bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Design Method of Component-Based Modular Fixture
Authors: Guo Hong , Pang Si Qin , Yan Xian Guo , Zhang Rong , Liu Zhong , Xu Chang Gui , Li Jian Wei
Published: November 2012

On the basis of the traditional assemble method of components modular fixture, the establishment of a component-based modular fixture design method was proposed in the paper. First of all, the concept of modular fixture components was put forward, and then the components according to different functions were classified, and the relationship table between the components and elements were established. At last of this paper, the application of this method was introduced through an instance. While designing fixture for part family, this method can utmost save design time and minimize the quantity of disassembling of combined fixture element, reduce the wear and tear of components, and shortening the time of manufacturing.
Design and Performance Analysis of Yielding Anchor Bolt with Large Deformation
Authors: Jiang Zhi Ming , Wang Cheng Jun , He Tao
Published: November 2012

According to the principle of the spring constant support device, a kind of large deformation yielding anchor bolt with three elongation properties has been designed. This paper analyzes the performance of the dynamically-pressured soft rock roadway surrounding rock and support mechanism of yielding anchor, carries out the force analysis of the anchor head, derives equation of the knife-type cam and uses Matlab programming to solve the knife -shaped cam contour curve. In the condition of keeping certain anchoring force, the anchor head can produce large displacement along the anchor body in order to decrease the pressure. And after the pressure of surrounding rock relief, the anchor head can move back to add pressure to form a “Loose - support”cycle of flexible supporting.
Numerical Investigation to the Impact of the Shape of the Front Part on the External Flow Field for a Heavy Duty Vehicle in Crosswind
Authors: Hu Xing Jun , Guo Peng , Yang Bo
Published: November 2012

To study the external flow field of a domestic heavy duty commercial vehicle, numerical simulation method was used in this paper, a hybrid of k-w and k-e turbulent model and polyhedron mesh was adopted to simulate the external flow field of the truck with three different front shape, and a comparative assessment was made to analyze the difference of the flow structure in the case of crosswind. The comparison analysis revealed that the top and bottom flow separation at the side wall of the truck was reduced due to the guiding effect of the truck nose, and the pressure at the leeward side of the truck was increased, which helped decreasing the pressure difference of the two sides, and alleviated the negative effect of the increased side positive-pressure area caused by the increased lateral area resulting from the elongated truck nose.
The Innovation Design of the Molding Method and Machine about Non Spherical Sweet Dumpling
Authors: Li Si Yi , Yang Ya Ping
Published: November 2012

In order to reshape the spherical sweet dumpling for other shapes such as flat triangle, flat spherical, etc., a kind of molding machine for sweet dumpling was developed. Three different molding principle schemes, such as the roller-extrusion molding, the pattern-plate plane-pressure molding, and the turntable with model-hole plane-pressure molding were putted forward. It took the roller-extrusion molding schemes as an example, the machine main work structure, transmission methods and so on were analyzed. Then to use UG software, the machine's overall design is completed.
Type Synthesis of Torsional Mass Dampers as Anti-Galloping Devices by Using Planar Four-Bar Mechanisms
Authors: Yang Jia Lun , Zhu Kuan Jun , Liu Bin
Published: November 2012

The type synthesis of torsional mass dampers (TMDs for short) as anti-galloping devices is very import for the safe operation of power grid. In this paper, the TMDs are considered as passive robotic manipulators, with the aim of introducing planar four-bar mechanisms into the synthesis of TMDs. By utilizing one planar four-bar mechanism or two planar four-bar mechanisms in a single TMDs, 6 TMDs with symmetrical structures and 18 TMDs with non-symmetrical structures are synthesized, which may improve the reasonable applications of the TMDs for the solving the anti-galloping issue of power grid.
A New Method of Gear-Position Decision for Automatic Manual Transmission of Parallel Hybrid Electric Bus
Authors: Zhang Hong Kun , Li Wen Jun , Hua Fu Gen
Published: November 2012

In this paper, the gear-position decision method based on 3-parameter the optimal economical shift schedule for Automatic Manual Transmission (AMT) of Parallel Hybrid Electric Bus (PHEB) is proposed. Vehicle simulation model was built by using ADVISOR simulation software. The simulation results show that 3-parameter shift schedule has improved in economical performance of PHEB compared with 2-parameter shift schedule.
Study on the Vibration Lamella Thickener and its Application in Mineral Processing Plant
Authors: Zhou Xing Long , Long Zhe Yi , Hu Wen Yuan , Zhang Xiao Ming , Shi Zhi Xin , Sun Dong Yang , Zhang Wen Bin
Published: November 2012

The development status and research progress of inclined plate sedimentation equipment, as well as the research progress of how to prevent the blockage of sedimentation channel were discussed. The main disadvantages of traditional inclined plate thickener were analyzed. A kind of new type lamella thickener which could vibrate the inclined plate was introduced. The core technologies of the vibration lamella thickener are that the inclined plate sedimentation channels are integrated and modularized, the integral sloping plate group module are suspension supported by using springs and each module mounted an independent mechanical vibration excite. By implementing an intermittent high frequency weak vibration to the sloping plate group module, the regular automatic cleaning of the surface of inclined plate was carried out, which could prevent the fine materials adhesive to the oblique plate and guarantee the settlement channel is not blocked, so as to achieve the purpose of long-term stable operation of the equipment. Vibration lamella thickener has been used in many concentrators successfully, including the classification of feed pulp, desliming and thicken of middle materials, dewatering and thickening of concentrate and tailing, and paste discharge of tailing thicken at al.. It is highly valued from clients by their good application in practical production.
Method of Genetic Algorithm Optimization Design of Permanent Magnet Retarder
Authors: Huang Yi Qi , Cai Gan Wei , Jiang Yu , Luo Zhao Yu
Published: November 2012

This paper introduced the method of multidisciplinary design optimization based on genetic algorithm. The basic structure and new auxiliary braking mechanism of permanent magnet retarder was analyzed. The influences of magnetic field parameters, structural design parameters, rotor parameters and permanent magnet temperature parameters on the behaviors performance of the permanent magnet retarder were discussed. The conceptual model of permanent magnet retarder was developed to maximize the brake torque of the permanent magnet retarder. The design variables included the radial width and the axis length of permanent magnet, the number of permanent magnet, the radius of rotor, the thickness of rotor, and the air gas. The constraint conditions included permitting temperature of rotor, saturation magnetic flux density of magnet material, and relation of structural geometry. The results of design optimization variables were obtained by applying genetic algorithm. The multidisciplinary design optimization in this paper is an effective method for the global design optimization of the permanent magnet retarder.
A Design Method Based on Extraction of Key Points of the Contours of Agricultural Machinery’s Internal Structure: A Case Study on the Design of a Small Self-Propelled Square Baler
Authors: Liu Sha , Wang Yun Qi , Ma Xiao Gang , Wang De Cheng
Published: November 2012

Refer to Reverse Engineering of extracting points cloud to generate a digital model, the paper proposes a rational method to design agricultural machinery's appearance. Depending on the product's internal structure contours, we can extract several key points and connect them by four ways: straight lines connecting, arcs connecting, free curves connecting and data fitting. Then we choose and modify the connected lines by a unified style to get the main profile of the machinery, which can better match the structural components. In the end a small self-propelled square baler's design process was presented to describe and testify the method.
Design and Parameterized Virtual Simulation Test of a Kind of Seat Bench for Ergonomic Test
Authors: Liu Sha , Wang Yun Qi , Wei Wen Jun , Wei Lei , Che Tian Xu
Published: November 2012

How seats can provide the best sitting posture is still a challenging subject in ergonomics. The researches on seats and sitting postures often need to measure physiological data or to record human’s subjective experience under a certain sitting posture. So to build a kind of multi-posture sitting bench has an important significance. The paper proposes a simple, reliable and less costly universal seat bench, whose size and shapes can be quantitatively, continuously and parameterized adjusted and which also can be adjusted to a variety of seat back curves by simulating spinal modeling. Based on Pro/ E software, two kinds of parameterized virtual simulation models are built, which can simulate deformation effects of the ergonomic seat bench easily and verify the correctness of data used to change the shape of bench.
Conception of Innovation of the Electric Vehicles
Authors: Zhang Jia Qi , Zhao Fang Hua , Huang Jin Yuan
Published: November 2012

Late-model vehicles inevitably will replace the automobiles due to the non-renewable characteristic of the automobile fuel. This paper has analysed the development trend of the novel vehicles that are driven by wheel hub motor, and proposed the necessity and the research direction of the single electric vehicle.
Application Research on TRIZ Technical Contradiction Solving Principles in Tank’s Protective Armor
Authors: Cui Yu Lian , He Cheng Ming , Zhang Shi Xin
Published: November 2012

TRIZ theory is a new method of creative design which provides systematic theory and tools for inventive problem discovering and solving. In this paper, technical contradiction solving principles is discussed and its application in tank’s protective armor is presented to illustrate its significant value in engineering practical problem solving.
The Study of the Furniture Design Based on Product Morphological Semantics
Authors: Li Xin , Ye Zhen He
Published: November 2012

morphological semantics is an important theory of kansei engineering. Making an analysis of psychological feeling of modern furniture by using molding semantics, pointed out that the awareness of modern furniture in material, shape, structure, color quantization scheme, which make the design of furniture products more in line with the need for user’s cognition, and provide effectiveness for furniture products’ design as well as manufacturing, make furniture to meet people to use the functional requirements and satisfy people’s aesthetic desire.
The Suit Pattern Optimal Design Based on the Features of Middle-Aged Women’s Body Shape
Authors: Lin Bin
Published: November 2012

The current clothes for standard body type are difficult to meet the middle-aged female. Through measuring and analysising the body for the middle-aged female (40 - 59years old) and the dataes，this paper offers a statistics summary. Aiming at the defects in the applying female suit，we adjust the reference parameters of pattern structure and improve the way of processing. The conclusion can be the guidance for pattern design of special type suit.
An Image Fusion Assessment Metric Based on Multi-Scale Structure Similarity
Authors: Xiao Zhang Shu
Published: November 2012

Considering the fact that the human visual system is not only highly adapted for extracting structural features such as lines, edges, contours from the input images, but also has characteristics of multi-channel (multi-scale) information processing, An image fusion assessment metric based on multi-scale structure similarity is proposed. Compared with the single-scale assessment metrics, the proposed metric provides more flexibility on account of considering the variations of viewing conditions and has better consistence with human perceptions. Visual experiments and quantitative analysis confirm its effectiveness, and the statistical results of image fusion demonstrate its promising applications.
Modal and Structural FEM Analysis of a 50 ft Pleasure Yacht
Authors: Alaimo Andrea , Milazzo Alberto , Tumino Davide
Published: November 2012

In this paper a structural Finite Element analysis of a 50 ft pleasure vessel is presented. The study is performed under different loads conditions: modal analyses have been done in order to find the natural frequencies of the vessel, structural analyses to verify the strength of the vessel to design loads. The design loads for the vessel considered are computed according to RINA rules for the construction and classification of pleasure vessels [1]. Two different composites are used for the lamination: one is a monolithic sequence of short fibre and balanced glass lamina, used for the bottom of the vessel and for structural reinforcements, the other is a sandwich made of glass fibre composite skins and a PVC core, used for the main deck and sides of the vessel. All the analyses are performed by using Patran/Nastran™ finite element commercial software in order to identify critical areas where possible reinforcement or redesign needs to be considered.
The Optimal Method of Structural Reliability and Implementation of MATLAB
Authors: Liu Xiao Fan , Li Yan
Published: November 2012

According to the geometric significance of the reliability index, the solving of the reliability index is converted to the optimal solution of minimum without complicated functional derivation. The optimal model of solving reliability index is generated. The software MATLAB is used to establish the general calculation program of reliability index, which could facilitate the calculation of structure reliability index.
Multi-Objective Optimization of a Large-Span Wing Analog Beam with Variable Cross-Sections
Authors: Li Kui , Qiu Yuan Ying , Sheng Ying
Published: November 2012

Aiming at the difficulty with structure and parameter design for a wing analog beam under a large deformation condition, a large-span cantilever truss model with Pro/e is designed. Then a mathematical model of the wing beam based on the Multi-objective Genetic Algorithm is proposed. Thereby the sizing optimization and shape optimization for the wing analog beam are conducted with the finite element analysis and meanwhile two main objectives minimizing the maximum von Mises stress and the mean-square error of the deformation displacement curve fitting are satisfied. A Pareto optimal solution aggregate is obtained after the optimization. Finally an optimal structure is concluded via the multi-objective optimization design, which improves the curve fitting accuracy of the wing and satisfies the stress strength requirement as well.
The Ultimate Bearing Capacity of Partial Concrete Encased Steel Strengthened Column
Authors: Yin Zhan Zhong , Wang Qiang , Liang Ya Xiong , Hu Zong Rui
Published: November 2012

The finite element modes of composite columns were built. The nonlinear analysis of the common steel column and the partial concrete encased steel composite columns were conducted. The load-displacement curves were getting. The strength of partial concrete encased steel Strengthened columns was much higher than the common steel column. Finally, Construction design suggestions and theory study of the type of partial concrete encased steel composite columns are advanced according to the results of analysis and computer simulation.
Modal and Local Modal Analysis of High Speed Train Car-Body
Authors: Chen Tian Li , Lu Yao Hui , Zeng Jing , Zhang Li Min
Published: November 2012

with the speed rising of railway train and the weight lightening of car-body, the frequency range of car-body is widened and the natural frequency is decreased. Especially, the local modes of car-body are caused by suspension device under the car-body bottom, which lead to large vibration response, influence the ride comfort and fatigue failure of structure. In this paper, the whole mode of car-body was analyzed through finite element software. The local mode of car-body bottom and side wall were computed by method of equivalent stiffness constrain. The results show that the local mode of car-body is mainly caused by asymmetry suspension device. The modal analysis method and local modal analysis method adopted in this essay provide the reference and guide the dynamic structural design.
Research on Roll Bending Forming Dynamic Linked List Model and Intelligence Deformation Analysis
Authors: Li Guo Chang
Published: November 2012

Aiming at the actual cold bending forming rolling process, in order to make more accurate analyses to stress and strain, the paper mentioned dynamic link model of rolling process, and based on the spline finite method , using the model to study the deformation analysis method of node and link in actual roll forming process, giving the holey stress and strain mathematics description type of link structure node, and on this basis intelligent node structure is given. Set up corresponding Agent for each node or link, establish knowledge rules for each Agent, realize a new method making use of link model to analysis cold bending forming. Provide the theoretical foundation of establishing a new complex profile groove design algorithm.
Simulation of Dynamic Properties of ER Damper
Authors: Tan Suo Kui , Song Xiao Ping , Zhang Yan Song , Zhao Yu Dong , Ji Song , Zhao Hong
Published: November 2012

By way of Matlab software simulation, the relationship among shear stress and frequency, velocity, displacement and ER properties has been researched, the damper strength -- velocity, damper strength – drift properties of shear electrorheological fluid damper has been given, the law of damper strength with frequency, gap , diameter and electric field strength has been showed that damper strength is increasing with electric field strength, the biggest damper strength is 100kN, the key facters are velocity, drift, frequency, gap and etc.
Finite Element Analysis of Motion Gesture for Four-Legged Walking Robot MiniQuad-1
Authors: Zou Jing Chao , Wang Lian Gwen , Guo Zhi Qiang , Chen Wei Hong
Published: November 2012

When walking robot MiniQuad-1 moves, the motion error is larger. The robot’s structure deformation is obvious. In order to improve the precision of the walking robot, the finite element analysis technique is adopted to research four-legged walking robot MiniQuad-1 in this paper. After the structure of the robot is introduced, the motion error of robot is discussed. The robot kinematics planning is completed based kinematics analysis. Some Motion postures are built using the solidworks. Static analysis of the motion pose is completed by using ansys software for robot MiniQuad-1. According to the analysis results, the robot structure improvement measures are determined. Further, the force and deformation for robot is studied after loading to lay the foundation for expand the robot of subsequent application.
Dynamics Simulation Study on 3-TPS/TP Parallel Robot
Authors: Luo Ji Man , Xing Zhi Hui , Jiang Yang , Wang Wen Zhao , Zhang Xiao Tong
Published: November 2012

The purpose of this research work is to find the relationship between the movement and force (torque) of 3-TPS/TP parallel robot, the Lagrange method is adopted to establish the dynamics model, and the results of the simulation by ADAMS are given in this paper. The curve is about the change of force come from every joint of active chains with time. It provides a lot of data for further reference to choose the drive device.
Study on the Tractive Ability of Lunar Rover Wheel by Discrete Element Method
Authors: Wei Can Gang , Zou Meng , Zhao Zhen Jia , Li Jian Qiao , Zhou Gui Fen
Published: November 2012

It is important to research the relationship between the lunar wheel and lunar soil in the circumstances of lunar surface in order that the lunar rover can work efficiently. Distinct Element Method (DEM) is an ideal method to analyze the relationship between lunar wheel and lunar soil. In this work, a prediction model for rigid-wheel and lunar soil is proposed, and the DEM model for lunar soil is found by the biax-test. The results show that the values of the simulation parameters in lunar soil are close to that of the real lunar soil after adjusting the micro simulation parameters. The Bekker’s model is used to calculate the pressure-sinkage, and the Janosi model is used to describe the shear characteristics. The plate-sinkage-test as well as the shear-test was simulated by PFC2D. The parameters of terra-mechanics were calculated based on the least square method. In the simulation, the value of K is 1635 kN/mn+2, n is 1.22 and k is 1.35 cm. After that, the soil bin system is simulated by the software PFC2D. Further, the tractive test which is checked out by the soil bin test and model calculation was simulated in PFC2D. Finally, by comparing the traffic ability of the nonrug-wheel with the rug-wheel, the results show that the slip radio is 0.52 of the rug-wheel and 3.21% of the nonrug-wheel under the traction load. The draw-bar pull is 121.67 N in the rug-wheel compared that of 7.71 N in nonrug-wheel under the slip is 10%.This indicates the rug-wheel can generate greater draw-bar pull and show better traffic ability than the nonrug-wheel under enough torque condition.
Micromechanical Modelling for Bauschinger Effect of Dual Phase Steel
Authors: Lu Chao , Kang Yong Lin , Zhu Guo Ming
Published: November 2012

The aim of this study is to simulate the micromechanics of dual phase (DP) 600 steel during tension-compression deformation and apply the calculated stress-strain curves to identify material parameters of phenomenological constitutive models with focus on Bauschinger effects. Image-based and statistical representative volume element (RVE) models were built to perform virtual tension-compression tests. The effects of mesh size, dimension, martensite volume fraction and martensitic particle size on stress-strain response were also studied. The results showed that the RVE models gave good overall prediction compared with experiment data. Material parameters of Chaboche nonlinear kinematic model were identified by fitting the resulted cyclic strain-stress curve from virtual tests using optimization software LS-OPT.
Study on Image Sensor Controlling Circuit for Wireless Endoscopic MEMS
Authors: Chen Ying Jun , Sun Zhong Hua , Ping Huang
Published: November 2012

In this paper the design and experiments of image sensor controlling circuit using in wireless endoscopic MEMS was studied. Through comparing the excellency and deficiency of various types of image sensors, and considering the working environment and requirements in the human body, it is pointed out that the CMOS image sensor with high integration density, low power consumption, small dimension and analog image signal output is suitable for the wireless endoscopic MEMS. By theoretically analyzing, the controlling circuits of two typical image sensors were designed successfully. The images captured in the animal experiments prove the validity of the designed circuits for the wireless endoscopic MEMS.
The Lower Extremity Exoskeleton Coordinated Control Method Based on Human Electromechanical Coupling
Authors: Guo Qing , Jiang Dan
Published: November 2012

This paper has introduced electromechanical coupling characteristics in the lower extremity exoskeleton systems, considered model ,according to legs supporting gait when people walking, established the load torque compensation model , and a mathematical model of knee position control system which is made of the servo valve, hydraulic cylinders and other hydraulic components, designed hydraulic cylinder position control loop in case of existing load force interference compensation, and used the method of combining the PID and lead correction network for frequency domain design ,ensured system to meet a certain stability margin. The simulation results show that this position control method can servo on the knee angular displacement of normal human walking, reached a certain exoskeleton boost effect, at the same time, met the needs of human-machine coordinated motion.
Discussions on Dynamic Way to Develop Electric Vehicle Control Method
Authors: Yan Shi Rong , Su Zhen Hai , Li Shi Zhong
Published: November 2012

Two different car traction control methods were studied and some dynamic characteristics were found. Firstly, a new electric rear driving car with two DC motors driving independently is controlled by a combined system. The combined system consists of a feed-forward control, a feedback control and a SRC. Secondly, a built-in permanent magnet synchronous motor is selected as its driving motor. A motor driving system with a current loop and a speed loop was developed. The current loop consists of maximum torque per ampere control and field weakening control. Some simulation work was done based on MATLAB/Simulink software. The simulation study showed the control system can make the electric vehicle work well.
Research on LWD Transmit Circuit Based on DDS Technology
Authors: Xing Ya Min , Liu Sheng Hu
Published: November 2012

A new type of logging transmit circuit applied to measurement while drilling (MWD) based on DDS technology is presented. As for logging instrument, Electromagnetic wave source is very important .The logging transmit circuit adopts TMS320VC33 series digital signal processing chip as main controller, in addition, LWD(logging while drilling) signal waveform generation circuit, peripheral signal processing circuit, DDS module, DSP and AD9850 interfaces, etc have been given.2MHz and 400KHz digital transmit circuit mainly composed of DDS AD9850 , which carries out the shift of the phase and the limit of the amplitude easily ,has been designed and debugged successfully. it is used to substitute for the conventional transmit circuit ，so the all-digital transmit channel of phase shift is achieved. The experimental results show that the logging transmit circuit for MWD is feasible.
Weighted Tuning PI Controller for MRAS Sensorless Induction Motor Drive
Authors: Wang Hsiu Ping , Chang Yu Feng
Published: November 2012

The paper presents a weighted tuning PI controller for speed estimating of induction motor using model reference adaptive system (MRAS) approach in a direct torque control system. The performance of speed controller affects the performance of sensorless each other. The objective of presented weighted tuning PI controller is to improve the performance of induction motor drive and enhance the performance of speed estimation. The presented controller is based on Ziegler-Nichols (Z-N) tuning formula with weighted tuning. The method improves the problem of parameter choice, reduces the over shoot and is simple as Z-N without system model. The availability of the proposed structure scheme is verified by through simulation results.
Experiment and Dynamic Model of Motor for Rotary-Screw-Driven Dispensing System
Authors: Liu Shu Zhen , Zhang Yu Bao , Chen Xiong Biao
Published: November 2012

Motor plays an important role in the dynamic property of the rotary-screw-driven dispensing system. Dynamic model of the motor was developed and validated in this paper. The output angle displacement and input voltage were measured from photoelectric digital encoder which is used to measure the angle displacement of the motor. In order to realize data smooth processing, Alpha-Beta filter was used. Discrete model of the motor was developed based on the Least Square Method and Model Selection criterion. Computational studies show that the system is equivalent to second order system. Moreover, the model was validated based on the experiment results under the different applied pressure and angular speed of motor. It is revealed that there is a good fit between experiment data and model simulation.
Research on Control Precision of the Neutron Bandwidth Chopper
Authors: Zhao Li Ru , Zhang Xiao Zhang , Zhang Kai , Zhang Tong
Published: November 2012

Operation of neutron bandwidth limiting chopper requires high controlling precision. Phase difference between the chopper rotor and the synchronous pulse signal should be maintained to be fixed. Rotating frequency of the rotor needs to be very stable. To achieve the above technical requirements, control scheme, dynamic balance, and other means are made. Thus influences to control accuracy are effectively reduced, which are from rotor asymmetry and neutron absorbing materials. In the case described in this paper, phase tracking error was controlled under ±0.10752°with 90% confidence for the designed chopper.
Study of Open Numerical Control System Based on DMC Motion Controller
Authors: Ren Zhong Wei , Song Ming , Yang Lin , He Yu Kun
Published: November 2012

An open numerical control system was built based on DMC movement controller. The system was simple and practical for most common CNC machine tools transform. The open numerical control system was introduced, the hardware connection and user interface program were designed combined with CA6140 lathe. The constructed CNC system has general functions of CNC system, the jog and interpolated motion can be realized, and this open control system can reach the requirements of customer. The experiments indicate that the open numerical control system can be applied to other machine tools, it has certain efficiency and usability.
Error Analysis of 6-DOF Welding Robot
Authors: Wang Cai Dong , Wang Xin Jie , Chen Xue Dong , Zhang Chao Hui
Published: November 2012

Welding robot has the advantages that welding quality stability, high efficiency, improving the working conditions of workers, and it is widely applied in the manufacturing sector. A six degree of freedom welding robot configuration is presented in this paper. The kinematics model of the robot is established by DH method and its kinematics was analyzed. At last the error model of the position-pose of the robot end-effecter, produced by the influence of robot joint movement variables deviation and structure deviation, was established by the differential method. The deviation influence on the end-effecter was analyzed by numerical simulation. The results prove the error model is right, and they will provide a reliable basis for robot position error compensation and accuracy optimum design.
Vibration-Based Terrain Identification for Planetary Exploration Robots Using Support Vector Machine
Authors: Li Qiang , Xue Kai , Xu He , Pan Wen Lin , Li Zhi Xu
Published: November 2012

Human ability to explore planets (e.g. the moon, Mars) depends on the autonomous mobile performance of planetary exploration robots, so studying on terrain classification is important for it. Vibration-based terrain classification unlike vision classification affected by lighting variations, easily cheated by covering of surface, it analyses the vibration signals from wheel-terrain interaction to classify. Three accelerometers in x, y, z direction and a microphone in z direction were mounted to arm of the left-front wheel. The robot drove on the sand, gravel, grass, clay and asphalt at six speeds, three groups of acceleration signal and one group of sound pressure signal were received. The original signals were dealt using Time Amplitude Domain Analysis. Original data were divided into segments, each segment was a three centimeters distance of driving; eleven features from every segment were normalized. The data from four sensors were merged into a forty-four dimensions feature vector. Ten one against one classifiers of Support Vector Machine (SVM) were used to classify; one against one SVM program from LibSVM was applied to multi-class classification using voting strategy in MATLAB. Facing to the same number of votes, we propose a new algorithm. Experimental results demonstrate the effectiveness of the feature extraction method and the multi-class SVM algorithm.
The Design of PID Controller of Turntable Based on BP Neural Network
Authors: Liu Kai , Lu Ping
Published: November 2012

As the parameters of traditional PID are fixed, the application areas are limited. With its research focus on the servo control system of the three-axis flight motion simulator table and the mathematical model of the brushless DC motor which is used as the drive mechanisms of the heading turntable. Put forward the traditional PID control arithmetic and NN PID control way arithmetic based on model forecast. MATLAB simulation is conducted to test stepping and sine input signals. The test results show that NN PID control way arithmetic is better than traditional PID control arithmetic and it is important to enhance the efficiency of flying simulator contro1．
Agile Intelligent Research of Manufacturing System in Modern Enterprises
Authors: Meng Chao , Wang Shan
Published: November 2012

In the large-scale modern production, enterprises have to improve the ability of agile intelligent manufacturing for surviving and developing. This paper explained the basic concept of agile intelligent manufacturing, and then discussed in detail its three bases, namely enabling technologies, management models and human resources. Because it adapts well to the production pattern of the 21st Century, this advanced method should be greatly promoted according to circumstances.
Edge Detection Combined Local Gray Level Difference and Competitive Fuzzy Logic
Authors: Tong Tong , Cai Yan , Sun Da Wei
Published: November 2012

In this paper, we present a new approach by local gray level difference based competitive fuzzy edge detection. In the light of human visual perception, a preprocessing step is proposed to simplify original images and further enhance the performance of edge extraction. Then we define the feature vector of each pixel in four directions and six edge prototype. Finally, BP neural network is used to classify the type of edge, and the competitive rule is adopted to thin the thick edge image. From the experimental result, it can be seen that the edge detection method proposed in this paper is superior to Canny method and Log method under the noisy condition.
The Combination of Local Fuzzy Entropy and Gray Level Difference-Based Thresholding Segmentation
Authors: Tong Tong , Cai Yan , Sun Da Wei , Huang Wei
Published: November 2012

A novel transition region extraction and thresholding method based on both frequency and degree of gray level changes is proposed by analyzing properties of transition region. Frequent gray level based transition region extraction methods are greatly affected by noise. To eliminate the algorithm limitation, a modified descriptor taking both degree and frequency of gray level changes into account is developed. The proposed algorithm can accurately extract transition region of an image and get ideal segmentation result. The experimental results show its superiority and feasibility.
A Template Matching Method Based on Genetic Algorithm Optimization
Authors: Zhang Xiao Hui , Liu Qing , Li Mu
Published: November 2012

This paper presents a method of using Genetic Algorithm (GA) to optimize template and image searching process, using template matching to recognize target. An initial matching template is set manually according to 2D shape and the optimizing template is obtained by GA optimizing to meet the requirement of real-time and effective performance. Then the pixel position is encoded into genes, template correlation degree function works as fitness function to do GA search to recognize the target. The relating image process experiments show that this method has good real-time and robustness performance.
Tracking Multiple Persons under Occlusion Using Appearance Model Based on Attributed Relational Graph
Authors: Wan Qin , Wang Yao Nan , Yu Hong Shan , Mo Xiao Qi
Published: November 2012

Appearance features are important for tracking persons in stationary scenes. The proposed algorithm was based on appearance mold built by attributed relational graph (ARG). The ARG was used for modeling human appearance features containing color and spatial information. The matching degree of the ARGs was utilized for analyzing tracking situations in current frame. For tracking persons under occlusion, multiple feature patches were generated and the genetic algorithm was used for finding optimal labels of patches. Experiments showed the utility and performance of the proposed approach.
Research on the Segmentation Method of Rice Leaf Disease Image
Authors: Liu Li Bo
Published: November 2012

In Order to Improve the Segmentation Effect of the Rice Leaf Disease Images, we Take Optimal Iterative Threshold Method,OTSU Method and Fuzzy C-means Clustering Algorithm to Make Adaptive Segmentation of Rice Disease Images which Were Collected under Different Circumstances. through Comparative Analysis, Experimental Results Show that: Three Methods All Can Effective Separate Spot from the Leaves; in Comparison, the Effect of the Fuzzy C-means Clustering Algorithm Is the Best, but the Number of Iterations Is too many and the Time Spent on it Is the Most; the Effect of OTSU Method Is Lesser, Optimal Iterative Threshold Method Is the Worst. Comprehensive Considering the Segmentation Accuracy and Efficiency, the Paper Chooses OTSU as the Segmentation Method of the Rice Leaf Disease Images.
Study on Maintenance Period of Reserve System Based on Markov Process
Authors: Zhang Xing Yuan , Lu Wen Hua , Yao Rao
Published: November 2012

This papercalculated and researched equipment maintenance cycle based on Markova Chains.Taking cold reserve system as an example, maintenance information of systems was analyzed and the space figure of state transfer of parts working process was painted. State equation was listed according to the space figure. Next state equation was solved and reliability parameters were obtained. The practical application of the system’s mean time to failures (MTTF) shows the feasibility and veracity of this approach.
STUDY on the RIA Based Remote Monitoring System
Authors: Tan Yong , He Ling Song
Published: November 2012

This paper presents a method to design the Rich Internet Application (RIA) based remote condition monitoring system. The contents include the structure of RIA based remote condition monitoring system, the design method of RIA based client program, and the design method of server program. The movability and cross-platform ability are two main advantages of this method. Two examples are also shown in the paper. One is to use a computer as the remote monitoring terminal, and another is to use a smart phone as the remote monitoring terminal.
Design and Application of LAN Interface Communication Module
Authors: Jing Zhen Hua , Zhao Jian
Published: November 2012

This paper presents three methods of design and development of an instrument with LAN interface. And the method of designing a communication module of Ethernet interface is adopted. Using this module, it is economical and efficient to change a traditional instrument into a network instrument without changing the hardware of the instrument. The communication module is designed on an ARM9 (S3C2410) platform. By transplanting embedded Linux OS in the platform, developing applications of Ethernet interface and standards RS-232 interface communication in Linux, the transformation of RS-232 port to LAN port is realized successfully in the module. For verifying the feasibility of this method, a signal generator is translated into a network signal generator by connecting with the module through serial port in the interior of the instrument. A virtual signal generator is also developed by LabVIEW on computer, and it can control the signal generator remotely though Ethernet.
Study on Earthquake Prediction Based on the BP Network
Authors: Zhu Yu Yu , Yang Han Song
Published: November 2012

In order to improve the prediction accuracy and reduce the influence caused by earthquake disasters, the method of predicting the earthquake is proposed. The method aim at nonlinear problems, limitation in training samples and unbalanced distribution that exist in the earthquake prediction, according to the sample the method build training and forecast BP network. The results of simulation experiments prove that the method is feasible and also helpful to improve the accuracy of earthquake prediction, because of less error.
Delay Dependent Stability Analysis of Active Power Filter
Authors: Li Tao , Liu Yong Qiang
Published: November 2012

The active power filter (APF) is a dynamic harmonic filtering equipment. The time delay is unavoidable and it has a great negative influence on the stability of the APF system. Based on the introduction of its topology and control strategy, the mathematical model of APF with time delay is built. And the model is a time delay systems with bounded nonlinearity, so a new delay dependent stability criteria is derived and formulated in the form of linear matrix inequality (LMI). The maximum allowed time delay is solved, and the relationships between it and some other parameters are investigated and simulated. The result can be as a reference in the future work.
Oil Pipeline Leak Detection System Based on Acoustic Wave Technology
Authors: Wang Li Kun , Xu Bin , Wang Hong Chao , Chen Shi Li , Wu Jia Yong , Yu Dong Liang
Published: November 2012

Principle of the pipeline leak detection system is presented, and the leak detection method based on acoustic wave and wavelet analysis is studied in this paper. The dynamic pressure transmitter based on piezoelectric dynamic pressure transducer is designed. The characteristic of dynamic pressure transmitter when pipeline leak happened is analyzed. The dynamic pressure signal is suitable for pipeline leak detection for quick-change of pipeline internal pressure, while the static pressure is suitable for slow-change of pipeline internal pressure. The signal is analyzed by wavelet analysis method to detect the singularity, and the singularity is used to recognize and locate the leak. This paper indicated that the dynamic pressure signal could be adjust to this detection that the pressure changes in the pipeline. Field tests in 68.2 km pipeline segment show that the method detects pipeline leak rapidly and precisely.
Design of a Resource Scheduling Tool for Production Project Management
Authors: Bin Zeng , Zhang Jing
Published: November 2012

Production planning is clearly needed in all manufacturing systems, and that is also the case for job shops. When dealing with a small number of products or jobs repetitive scheduling becomes a major issue. In this situation, the same tasks are performed sequentially and repeated from job to job. To help with this problem, a resource scheduling tool is developed that would work alongside Microsoft Project. This tool should act as a front end to Microsoft Project and allow for the creation of a schedule with a minimal amount of work for the scheduling manager. Due to the repetitive nature of production processes, the tool should be able to eliminate most of the manual scheduling currently done exclusively in MS Project.
Motion Planning of Underwater Vehicle-Manipulator System with Joint Limit
Authors: Zhang Ming Jun , Peng Sheng Quan , Chu Zhen Zhong , Wang Yu Jia
Published: November 2012

This paper studies motion planning of underwater vehicle-manipulator system (UVMS) based on weighted minimum norm method with joint limit. In response to the problem that joint motion is limited and cannot give full play to kinematical performance in the range of allowed orientation angle, existed in the traditional weighted minimum norm method for joint limit, an improved method about motion planning is proposed. By means of introducing threshold in the joint potential function to change the initial position where the joint velocity is limited, the method makes that joint is only limited between threshold and boundary when it moves from the middle position to bilateral boundaries. A simulation is carried out to verify the proposed motion planning method.
Database Design of Failure Diagnosis Expert System for Combustion Engine
Authors: Liu Yong , Zhang Sai Fei
Published: November 2012

The database design process for failure diagnosis expert system is divided into two parts. One part is, in the knowledge base, we mainly introduce design ideas of each maintaining module of in knowledge base, including the implementation method for entry, retrieval, modification and inquiring function interface of knowledge. Another part is dynamic database. We mainly introduce the modules of specific design process for data transmission. The entire system realize by C++Builder language. And the detailed codes of database are written into the program code book.
The WMSN Routing Protocol Based on Multiple QoS Constraints
Authors: Li Peng , Zhao Ke , Xiong Yan
Published: November 2012

In order to satisfy the data transmission in the wireless sensor multimedia network of several QoS constraints. This paper proposes a real-time and low energy consumption routing protocol on the basis of MMSPEED, This agreement inherits the advantages of MMSPEED protocol, multipath and priority classification data transmission. And at the same time, in the routing decisions this paper chooses fragmentary active routing decisions, further energy consumption and transmission delay reduction. The simulation results indicate that in the random node distribution, the agreement in real-time and prolong the network survival cycle, etc, have a good performance.
Study on Rate Convergence in Distributed Wireless Mesh Network
Authors: Chen Yi , Gao Ge , Wang Sai
Published: November 2012

One of the major factors that affects the distributed network utility maximization(NUM) is the exchange message delay which leads to oscillations due to imperfect response to time-variant channel. In this paper, a novel Fuzzy technique is presented to solve the reverse impact control delay in distributed NUM of wireless mesh networks. Simulation results illustrate better performance.
Temperature Characteristic Optimizations of the RTD Sensitivity for the MEMS Sensor Applications
Authors: Zhang Bin Zhen , Guo Hao , Tang Jun , Liu Jun , Wang Jie
Published: November 2012

The electron in the RTD has a high mobility with the resonant tunneling effect. We have embedded the RTD in the structure of MEMS sensor using the meso-piezoresistive effect. The sensitivity of sensors is higher one order of magnitude than the accelerometer which used the silicon piezoresistive strip as sensitive unit. In this paper, we optimize the temperature effect of RTD as the sensitive unit of sensors by reducing the size of emitter mesa of RTD structure. In the experiment, the temperature coefficient reduces from 10μA/°C to 5.22μA/°C at the peak, and reduces from 35μA/°C to 13.88μA/°C at the valley. Meanwhile, the temperature effect of bias voltage sensitivity reduces from 6mA/°C to 2mA/°C at the valley. Finally, the reliability and precision of RTD structure used as the sensitive unit of MEMS sensors is improved.
Identification Method for Multichannel Multisensor ARMA Signal with Colored Measurement Noises
Authors: Zhang Ming Bo , Sun Xiao Jun
Published: November 2012

For the multisensor multichannel ARMA signal with ARMA colored measurement noises and unknown model parameters and noise variances, this paper presents a kind of multi-stage identification method. At the first stage, the on-line information fusion estimator for the unknown model parameters is presented based on the Recursive Instrumental Variable (RIV) algorithm and the Recursive Extended Least Squares (RELS) algorithm, which is realized by computing the average of local estimators for model parameter. At the second stage, the on-line information fusion estimator for the unknown variances is obtained using the correlation method, which is realized by computing the average of the local estimators for noise variances. At the third stage, the information fusion parameter estimator of MA model is presented using the correlation method and the dead zone Gevers-Wouters and LS algorithms.