bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical and Experimental Study of Forming Limit Diagrams in Sheet Metal Forming and Seamed Tube Hydroforming
Authors: Zhang Ren Tao , Chen Xian Feng , Su Hai Bo , Chen Zhi Yong
Published: September 2013

The paper establishes the forming limit diagrams (FLDs) for QSTE340 seamed tube hydroforming and the mother sheet metal forming by numerical approach and experimental approach. A novel experimental approach is proposed to evaluate the formability for tube hydroforming under biaxial stretching through elliptical bulging.Then the Nakazima and three types of tube hydroforming tests are simulated with finite element (FE) program LS-DYNA. The failure criterion of thickness gradient criterion (TGC) is introduced. The FLDs for seamed tube hydroforming and the mother sheet metal forming are constructed. The comparison of results based on TGC with experimental data shows the TGC is an appropriate one to determine the onset of localized necking. Finally, the differences and relationships between the FLDs for the seamed tube hydroforming and the mother sheet metal forming are discussed.
Thermal Crown Analysis of the Roll Sleeve in Twin-Roll Strip Casting Process
Authors: Cui Hai Tao , Wang Guo Dong
Published: September 2013

In the twin-roll strip casting process, analyses of heat transfer and deformation for the casting roll sleeve are carried out by using the finite element program ANSYS to examine the the thermal crown. The effects of several factors such as molten pool temperature, heat flux onto the roll surface and roll edge, heat flux onto the cooling channels, and cooling water temperature on thermal crown are investigated. The results show that the thermal crown does not change sharply during the casting process, after the casting roll reaches thermal equilibrium.
End Formation of a Round Tube into a Square Section with Reduced Forming Loads
Authors: Tan Chin Joo
Published: September 2013

Low formation loads are desirable in metal stamping industries as it reduces the press capacity of the machine and the tooling cost. In the previous study, the author had successfully developed a 2-stage end formation process of a round tube into a square section having small corner radii. However, the formation load in this process increased linearly with the punch stroke in the 1st stage due to the continuous expansion of the tube end by the conical die. Hence, buckling and cracks occurred at the circular section and the bottom end of the square section respectively when the punch stroke was excessive. In this study, the author proposes a circular die having a conical bottom replacing the conical die for the expansion of the tube end. Although the formation load increases when the tube end is expanded at the conical bottom, the amount of increase becomes small when the tube end reaches the circular section of the die due to its constant diameter. At the circular section, the tube end curls and wraps over the die when the punch stroke is increased. In the 2nd stage, the squaring process is performed with a conical bottom square punch and a taper square die for the two different expanded tubes i.e. the one formed with the conical die and the one formed with the conical bottom circular die. Both Finite Element Method (FEM) simulation and experiment were performed to evaluate these two processes. The distribution of plastic strains, forming loads and product appearances are investigated. With the circular die, the maximum forming loads are successfully reduced by 20% and 33% in the 1st and the 2nd stages respectively in the experiment when compared to the ones formed with the conical die. No buckling and cracks are observed for the tube formed with the circular die.
Study on Surface Properties of Big Tilling Depth Rotary Blade for Laser Shock Peening
Authors: Xi Xiao Bo , Miao Hong , Tao De Qing , Zhao Li , Zhang Rui Hong , Zheng Zai Xiang
Published: September 2013

A stress concentration area of big tilling depth rotary blade with 350 mm turning radius is found by ANSYS, and is strengthened by laser shock peening (LSP). The surface properties of rotary blade for LSP, included residual stress, surface micrograph, microstructure and hardness, are researched in this article. The results show that microstructure density is higher after LSP, and the layer is smoother, then the stress concentration is decreased. Meanwhile, the hardness and residual stress of rotary blade surface layer are significantly increased. The average residual stress reaches 390.7 MPa, and the average Rockwell hardness number achieves 45.1 HRC. Measuring results of residual stress, surface micrograph, microstructure and hardness after LSP indicate that LSP can significantly improve the surface properties of rotary blade, and it provides a new basis for further mending surface quality and fatigue property of big tilling depth rotary blade.
Reliability Analysis of Alumina-Based Ceramic Cutting Tool's Wear Life by Saddle Point Approximation
Authors: Wang Xin Gang , Jin Ya Juan , Zhang Yi Min
Published: September 2013

Under continuous cutting conditions, the reliability of alumina-based ceramic cutting tools wear life with abrasion wear was discussed extensively. An ultimate state equation of alumina-based ceramic cutting tools wear life was proposed according to stress-strength interference theory. Based on the premise that the probability distribution of random parameters has been known, the fracture toughness KIC and the hardness H which obey Weibull distribution were transformed into normal distribution by means of the equivalent normal distribution method, and then the reliability of alumina-based ceramic cutting tools wear life was analyzed by saddle point approximation method. The probability density function and cumulative distribution function of the ultimate state equation were accurately and quickly obtained by way of saddle point approximation, as a result, the saddle point approximation method was proved accurate with high computing speed in comparison with the Monte-Carlo method. Therefore, the application of the saddle point approximation method developed the reliability analysis theory of alumina-based ceramic cutting tools wear life.
Special Fixture Designed for the Fine Boring of Auto Engine Cylinder
Authors: Luo Jing , Xiao Tie Zhong , Gong Wen Jun , Zhan Jie
Published: September 2013

The rationality and advancement of fixture has an important influence on the precision of fine boring which has a direct impact on the performance on auto engines and is one of the key processes of cylinder machining, so a special fixture was designed in this thesis in order to improve the capability of fine boring based on the characteristics of cylinder fine boring. The detail of operating principle, positioning/clamping mechanisms, elevating mechanism and air-operated system were introduce, practical applications indicated that, this fixture can be able to ensure the quality of machining, and improve the flexibility, conveniences and automaticity of the process of machining, so this fixture can greatly reducing the auxiliary time, reduce the production cost and labor intensity, and more satisfying the demand of mass production.
Research on Genetic Algorithm in Mold Optimization Design
Authors: Chen Xi , Zhao Bao Sheng
Published: September 2013

Species evolution model in natural is introduced into the genetic algorithm to reflect the true laws of evolution. A multi-population genetic algorithm based on species evolution is developed. In the algorithm, the parameters of species evolution model are considered as design variables, and the equation is regarded as modified arithmetic crossover operator to participate in genetic operation. Immigration operator is used to promote convergence and enhance the ability of search optimal solution. The improved genetic algorithm is applied to mold optimization design to search the optimal gate location. The examples indicate that this algorithm can effectively solve the mold optimization problem.
Prediction of the Metro Section Passenger Flow Based on Time-Space Characteristic
Authors: Jin Jun , Wang Yan Hui , Li Man
Published: September 2013

At present, the real-time data of the section passenger flow can’t be acquired in the process of urban rail transit operation, which brings some difficulties to the passenger monitoring and controlling. After analyzing the spatio-temporal complexity characters, this paper adopted BP neural network to predict the section passenger flow, which was based on the first three consecutive periods of the in and out station traffic and the next period of the section passenger flow data. Finally, Fuxingmen and Xidan in Beijing urban rail transit were selected, their first three consecutive periods of the in and out traffic are put as the input data, and the next period of the section traffic as the output data, then BP neural network was used to train and predict under MATLAB. The anticipant and the actual output results are well fitted, which proves that the data processing method is effective and the parameters of the BP neural network are reasonable, and it can provide theoretical reference for the transport operators to some extent.
Quantitative Analysis of the Defect Dimension for Fracture Surface of Fracture Splitting Connecting Rod
Authors: Kou Shu Qing , Yang Hong Yu , Yang Shen Hua , Lin Bao Jun
Published: September 2013

The fracture surface of con-rod is difficult to be quantitatively described due to its indented macro morphology. Thus, the range of fracture surface defect dimension has no uniform standard. In order to solve this question, 3D software about the digital fracture surface reconstruction was developed by combining the fracture splitting technology of con-rod with reverse engineering, which realized the reproduction of its morphology and completed the real area calculation of the surface. The results show that the fracture surface area processed by fracture splitting is 13.1% larger than that of the plane processed by machining. It represents that the defect dimension range of fracture surface is improved compared to empirical value without reducing the bearing capacity and usability.
Boiler Combustion Control System Optimization Strategy
Authors: Zhang Yong , Yao Yuan , Luan Ting
Published: September 2013

Optimal control of the boiler combustion system is related to the economy and stability of the entire production process. To the problem that the boiler main product steam quality and the safe operation of the boiler optimization control, the fuzzy adaptive algorithm combined with the traditional PID control in the DCS system is proposed. The method optimizes the control system parameters and improves the control program. The simulation results show that the control scheme is better than the traditional PID control, and has good dynamic performance and stability. Both the boiler outlet steam quality and the security operation of boiler are improved.
Research on the Discretization of STL Model in the CNC Incremental Forming
Authors: Zhu Hu , Ju Jin , Zhang Wei
Published: September 2013

To the demand for the discretization of STL(Stereolithography) model in sheet metal CNC incremental forming, two kinds of discretization algorithms respectively based on unequally divided projection grids and unequally cutting planes were proposed. And the software systems were implemented by using VC++6.0, C++, OpenGL. Meanwhile the comparison of every discrete model with the original test model was done by using RapidForm XOV verification software. The case study shows that both discretization algorithm can generate uniformly distributed discrete points, and compared with the original test model, the average errors are 0.0475 and 0.0036 respectively.
Research on Assembly Optimization of Hull Section Based on the Genetic Algorithms
Authors: Xu Wei Jun , Wang Long Kan , Zhang Zhi Fan
Published: September 2013

This paper is concerned with the study on the assembly optimization of a hull section based on the genetic algorithms. It is significant important for improving efficiency of shipbuilding. Firstly, a typical hull section is selected as the analysis target for the assembly optimization. Then, the period and cost of shipbuilding is combined with the genetic algorithms, in which, the optimal assembly sequence is very important for the analysis, and it should be drown up. Finally, the hull section model is constructed by using CATIA software, and the simulation demo of the assembly procedure is carried out. The Genetic algorithm is a global optimizing method which can improve the calculation speed by using the subassembly. The virtual assembly of hull section based on the genetic algorithm is carried out under the environment of CATIA software, which including entity design, assembling and post-processing analysis and so on. The virtual assembly technology can be widely combined with the engineering production, not only have a significant effect on reducing costs and shortening the period of production, but also improve the quality of production. It is very useful for providing valuable reference in the actual productions.
B-Spline Curve Approximation Using Feature Points
Authors: Cheng Xian Guo
Published: September 2013

This paper addresses the problem of B-spline curve approximating to a set of dense and ordered points. We choose local curvature maximum points based on the curvature information. The points and the two end points are viewed as initial feature points, constructing a B-spline curve approximating to the feature points by the least-squares method, refining the feature points according to the shape information of the curve, and updating the curve. This process is repeated until the maximum error is less than the given error bound. The approach adaptively placed fewer knots at flat regions but more at complex regions. Under the same error bound, experimental results showed that our approach can reduce more control points than Parks approach,Piegls approach and Lis approach. The numbers of control points of the curve is equal to that of the feature points after refinement.
The Research of Adaptive Robust Predictive Current Control Algorithm of Permanent Magnet Synchronous Motors
Authors: Lin Lian Dong , Han Xue Bing
Published: September 2013

Predictive current control algorithm which based on deadbeat theory is studied in this paper which can improve the current control performance of PMSM. In order to obtain high control effect, on-line access to accurate motor parameters such as fault diagnosis, condition monitoring is important in many areas, especially to improve the traditional deadbeat predictive current control algorithm sensitivity to inductance error, this paper presents an inductor-based parameter identification current predictive control algorithm of permanent magnet synchronous motor based on least mean square (LMS) theory. By Simulation the identified inductance will be feed back to the control model to improve the system tolerance of inductance error. A 0.75KW PMSM is involved to verify the performance of the proposed algorithm, then present and analyse the simulation and experiment results.
Study on Common Fault of Wind Turbine
Authors: Yan Cun Fu , Hu Rui Hua
Published: September 2013

ntroducing the structure and working principle of wind power generator. Analysising the failure phenomenon and common faults of wind turbines in working, giving measures for troubleshooting and maintenance points, and provide a theoretical reference for the manufacturers and users.
The Shape Optimization Study of the Rolling Wheel of CNC Crushing Machine
Authors: Zhang De Xin , Yang Wen Liang , Ou Yang Jie , Zhang Li Juan , Liu Shao Wei , Gao Wei
Published: September 2013

The paper combined with engineering background, Selecting the Pressing gear of CNC crushing Machine Steady Support Body as starting point for Optimization modeling, Analyzed the simple conditions theoretical physical model of Support Body. Reasonably we selected design variables, optimized the Support Body, and obtained relevant data. And analyzed the results, to check the accuracy of the optimize results through the individual histogram map.
Adaptive Control for Aircraft Anti-Skid Braking System
Authors: Li Feng Yu , Jiao Zong Xia
Published: September 2013

The aircraft tire friction force varies significantly with different types of runway materials, surface lubricity and vertical load, which affects the braking efficiency. In this paper, the dynamic LuGre model is introduced to describe the friction force, which could give a projective mapping from the physical unknown runway state to mathematical friction force model with parametric uncertainties. The state observers are employed to estimate the unmeasurable internal friction states of the friction force model and the estimates are substituted into the parameter adaptive law to obtain the current runway state. The pseudo-static friction force model is calculated online to obtain the maximum friction coefficient and its slip ratio. This slip ratio is set as the tracking target for the well-designed feed-forward controller based on the feedback linearization method. The simulation results are shown to verify the proposed method.
Research on Reliability of Electromechanical System Based on the Competition Mode
Authors: Han Wei , Sun Shi Ju , Liu Yong , Liu Qiang
Published: September 2013

The reliability of electromechanical system is one of the key problems to restrict the rapid development of electromechanical system. Based on traditional reliability analysis methods, the degradation failure modes of electromechanical system are investigated, the reliability modeling analysis method based on competing mode of hard and soft failure is presented. The relations between reliability, failure rate, MTBF and failure threshold are analyzed by this method. The results can help to optimize electromechanical system design.
Developing and Research on Open Motion Controller Based on PC
Authors: Cui Guo Wei , Chang Rui Li , Han Jun
Published: September 2013

With the development of modern manufacturing, it is obvious that traditional numerical control system is bad in compatibility and is expanded uneasily in function and is not flexible in human-machine interface. The open numerical control system has become the research mainstream of numerical control technology. Therefore, the open motion controller based on PC is developed in the paper. In addition, the components and design method of system are introduced in detail.
The Influence of Pole-Slot Match on Magnetomotive Force with Concentrated Fractional-Slot Winding
Authors: Si Meng , Yang Ying Li
Published: September 2013

Magnetic field, produced by magnetomotive force (MMF) harmonic waves, is harmful to motors, by reducing efficiency of motors, resulting in demagnetization of permanent magnets and so on. It is also responsible for the increase of eddy current loss and the rise of temperature of rotors. Thus, research on the influence of pole-slot match on MMF with concentrated fractional-slot winding is necessary. This paper aims at researching unit motors with different cooperation of slots and poles. First, basic principle of MMF is described. Then, with different kinds of unit motors, MMF of harmonic waves is analyzed. Based on these analyses, distributive regularities are summarized.
Design Method of Offsetting Transmission Ratio of 6 Tons Truck Car
Authors: Chang Lv
Published: September 2013

In order to ensure the necessary economy and power performance indexes of car, it was necessary to configurate reasonable transmission gear and transmission ratio. Taking 6 tons truck as an example, two methods were designed according to geometric progression and offset geometric transmission ratio. The results show that the method of bias geometric distribution ratio is superior to the method of geometric distribution.
Progress in Research for Pipe Inner Diameter Detection Technology Based on Laser
Authors: Cao Jian Shu , Li Kui Long , Li Rui Qing , Wei Yi Di , Li Gui Jun , Zhang Lei
Published: September 2013

It is a new method of pipeline detection that pipe detector based on laser. This paper introduces the laser inner diameter detector related principle, detail the state of development and the latest development of pipe detector based on laser designed and made by domestic and international companies, and contrastive analysis the function of pipe detector. The paper proposed development prospect and the main technical difficulties of the pipeline laser detector. The development direction of pipeline laser detector is high efficiency, high precision and high speed. However, the key technical difficulties of in pipe detector based on laser, such as centering problem, reliability and accuracy problem, data analysis and processing problems. Keywords:Pipeline; Laser; Detector; Inner diameter;
Modeling and Simulation of Vector Control System for Asynchronous Motor
Authors: Rong Jun , Ding Yue Jiao , Chen Xi
Published: September 2013

Alternating current (AC) machine speed-adjusting system plays a very important role in our daily life. Firstly, this paper studies the basic principle of vector control system for three-phase asynchronous motor based on the MT coordinate system, and this paper especially gives the calculation principle diagram of the current model for rotor flux. Then this paper establishes the double closed-loop vector control system based on the Matlab/Simulink detail, and gives the simulation results. The simulation results of the double closed-loop vector control system verify the correctness of the simulation models and the principle of vector controlling.
Study on Temperature Control System of Film Laminating Machine
Authors: Guan Li Ming , Tian Jia Xing , Lu Chen , Zhang We
Published: September 2013

The recursive compensatory fuzzy neural network model was established against the characteristics of temperature control for film laminating machine. The neural network can be used to construct the fuzzy system, and the self-adaptive and self-learning capability of neural networks was used to automatically adjust fuzzy system parameters, BP network could be learned and trained by the gradient descent algorithm. Based on the test data for the study and testing of network, system error is less than the national standard error requirements, the results proved the effectiveness and feasibility of the algorithm.
Automation Control System of Pharmaceutical Factory Based on Wireless Sensor Network
Authors: Shang Qiu Feng , Zhang Lin
Published: September 2013

In view of the traditional wired sensing network PLC control system wiring difficulty, the equipment mobilized shortcoming, this article has designed based on the ZigBee wireless communication pharmaceutical factory automation control system. Using the ZigBee technology realization wireless sensing network, completes automatically to the plant production in various parameters monitor, the analysis, processing, automatically does not conform to the request parameter to completely or the part production process in to carry on the adjustment. This design uses the LabView software to replace the configuration software to complete the backstage the movement. Using LabView to carry on the instrument system the design, the examination and the realization, may reduce the system the development time, enhances the production efficiency. This system has the broad application prospect.
Design of Intelligent Home Control System Based on a Variety of Network
Authors: Chen Dong Hong , Ke Shuang , Chen Ji Quan , Chen Xiai
Published: September 2013

An intelligent home system controlled via GSM, GPRS and the Internet was developed to investigate the control system of intelligent home. The home environment including concentration of carbon dioxide, UV intensity, light intensity, smoke concentration, temperature and humidity were real-time transmitted to the host computer monitoring platform. The intelligent home system supports four different control methods with the remote control functions of household appliances, security locks of doors, lighting system and smart curtains realized through a variety of network.
The Design for the Hardware of Analog Controlling Module
Authors: Dai Hua , Xu Lu Tie , Chang Wen Ping
Published: September 2013

A scheme for analog controlling module detection system is fixed basing on the test signal analysis of smart munitions control cabin. The key detection signal of control module can be simulated with PC104 bussing technique, and the structure and working principle of data acquisition system is described. The test data can be acquired and processed by this system, which has such following merits: high precision, complete parameters, operation easy and reliable.
A Simple SOM Neural Network Based Fault Detection Model for Fault Diagnosis of Rolling Bearings
Authors: Li Zhi Chun
Published: September 2013

Rolling bearings are common parts in the transmission systems and have been widely used in various kinds of applications. The normal operation of the rolling bearings hence plays an important role on the efficiency of the system performance. However, due to hostile working environment the rolling bearings are prone to failures. The transmission systems may break down when there occurs faults in the rolling bearings. As a result, it is essential to detect the faults of rolling bearings. However, when use artificial intelligence method to diagnose the rolling bearings faults the signal processing is extensively complex while very few works have been done on the simplification of the artificial neural network (ANN) models for the rolling bearings fault detection. To deal with this problem, a simple self-organized map (SOM) neural network method together with a principal component analysis (PCA) based feature reduction procedure is proposed to diagnosis rolling bearings faults in this work. The vibration data of the normal and faulty rolling bearings was acquired from an experimental test bed. The PCA was firstly used to extract distinct fault features. Then the SOM was employed to train and learn the fault features to identify the fault patterns. The fault detection results show that the proposed method is feasible and effective for the fault diagnosis of rolling bearings. The fault detection rate is beyond 89.0%.
Study on Optimization Control Method of the Pickling Process
Authors: He Da Kuo , Qin Wei , Liu Tong Shan , Yuan Qing Yun
Published: September 2013

The pickling process is the important metallurgical production process. Based on pickling process prediction model, considering the max economic efficiency as the optimized objective, and seeing the operating variables as the decision variables, this paper establishes the pickling process optimization model and makes the optimized calculation to get the value of each key control circuit. At the same time, considering the pickling process prediction model error brings the uncertainty to the optimization results, based on iterative optimization control thoughts do pickling process optimization control, the simulation results verify the effectiveness of the method.
Path Following Control of a Mobile Robot Using Contractive Model Predictive Control
Authors: Kanjanawanishkul Kiattisin
Published: September 2013

In this paper, we propose a novel controller based on contractive model predictive control for the path following problem of a mobile robot. Besides dealing with path following, we also fulfill the following objectives: bounded control signals and optimal forward velocity. These three objectives are all achieved through integrating into our model predictive control framework as constraints. However, the major concern in the use of model predictive control is whether such an open-loop control scheme can guarantee system stability. In this case, we apply the idea of a contractive constraint to guarantee the stability of our MPC framework. To illustrate its effectiveness, several simulation scenarios have been conducted.
The Parameter of Fuzzy Self-Tuning PID Controller Realized Based on VHDL
Authors: Wu Qiong , Ma Shao Hua , Cai Zhi Yuan
Published: September 2013

This paper designs the core structure of fuzzy parameters self-tuning PID controller on the basic of nonlinear tracking-differentiator. Through constantly testing error E and rate of change EC, makes the controlled object have good dynamic and static performance. In order to meet the different requirements of controller parameters in the different constant of E and EC, the system can modify three parameters online in operation, and realizes the comprehensive and simulation process based on VHDL.
A Power-Control-Based WSN Boundary Detection Algorithm for Agricultural Environment Mornitoring
Authors: Xu Xu Min , Feng Guo Fu , Chen Ming , Zhang Yun
Published: September 2013

As the traditional boundary detection algorithms usually ignore the boundary width, this paper proposed a boundary detection algorithm based on power control to adjust the edge width. The algorithm did not need to establish the 2-neighbor graph which with higher time and space is complex. The algorithm detected boundary only by analyzing the connectivity of the rings, and did not require any information about node location. Simulation results show that the algorithm can detect the boundary nodes exactly.
Intelligent Control of a Cart and Pole System
Authors: Jia Hong Li , Liu Qiang , Du Feng
Published: September 2013

The paper focuses on the cart-pole system by using fuzzy control, fuzzy mamdan control theory, the fuzzy controller perturbation amplitude simulation and fine-tuning of different linear and nonlinear model. It applicates MATLAB soft which function is so powerful, suitable for a wide range of engineering software system for vehicle simulation intelligent control. And then adjusting fuzzy controller on PID control system, fuzzy control system, the cart-pole system can provide reliable data for our real life and production in the future.
Design of Automatic Tracking System Based on FPGA and Binocular Vision
Authors: Song Wei , Chen Yan Xiao , Zhang Long Ji , Qin Shu Yuan
Published: September 2013

An intelligent system with automatic tracking function based on FPGA and binocular vision was designed. The system can be divided into five parts, and they are the image acquisition and processing module, moving target detection module, motion control module, moving target tracking module, and the depth information computing module. The basic design theory and the structure of each component were analyzed from software and hardware.
Design of Multi-Stage Optimal Arbitrary Time-Delay Filter
Authors: Liu Ke Ping , Zeng Jian Peng , Yang Min , Jiang Chang Hong
Published: September 2013

Input shaping is an effective method for suppressing residual vibration of flexible system. In this paper, the design processes of Zero Vibration (ZV), Zero Vibration and Derivative (ZVD) shapers are deduced. Based on the idea of the robustness input shaper, the Multi-stage Optimal Arbitrary Time-delay Filter (MOATF) is proposed. The proposed control method is implemented on the second-order linear time-invariant system. Simulation results show that the residual vibration can be reduced effectively and the proposed method have great robustness in system parameter uncertainty.
The Research and Development of Hydraulic Support Applied for Thin Coal Seam
Authors: Xie De Yu , Zhao Xue Yi , Li An Qi
Published: September 2013

Now thin coal seam mining technology and equipment falls behind and the researches on hydraulic support is not enough, this paper introduces the structure and design characteristics of hydraulic support of thin coal seamm, systematically describes the automatic control function, and establishes simple planar models of thin coal hydraulic support. Successful application of the support provides methods and experiences for design and manufacture of thin coal seam hydraulic support.
Build for Motion Control System of Planar Five-Bar Parallel Mechanism
Authors: Zhao Dong Yang , Xin Hong Bing , Li Quan Lai , Cui Deng Qi , Xin Yue Fei , Liu Long , Wang Tan
Published: September 2013

MC206X motion controller being chosen as the core of the system, this paper built the control system of a planar five-bar parallel robot, achieved the debugging of the hardware of a full servo control system, developed the Motion Perfect software system on the basis of the Windows-based operating system to complete the planning and control of continuous paths.
Obstacle Performance of Track Robot with Passive Rocker Based on Recurdyn
Authors: Liu Man Lu , Zhang Jing , Li Kuan
Published: September 2013

To solve the instability of track robot in the process of climbing obstacles, a track robot with passive rocker was designed and a three-dimensional model of track robot was developed by Unigraphics NX in this paper. Furthermore, the kinematic analysis was made for obstacle performance of the track robot. The virtual prototype model of the track robot with passive rocker was set up by using the tracked vehicle subsystem of multi-body dynamics simulation software RecurDyn and kinematics simulation for this robot was made. The simulation results verify the feasibility of the machine and provide some theoretical guidance for developing the obstacle performance of track robot.
Neural Network Aided GPS/INS Integration for UAV Navigation
Authors: Meng Qing Ji
Published: September 2013

Traditional INS/GPS integrated system would degrade sharply when GPS outages, a new method is proposed in this paper, which is a NN(Neural Network) aided KF (Kalman Filter) integration method.The structure of the method was shown summarily, the NN and KF design flow was discussed briefly, test experimentations have been done to prove the availability of the proposed method. Primary test results have shown that the proposed method can reduce the navigation solution during GPS outages, by about 70%, in comparison with INS stand alone results in GPS outage of 60 seconds.
Research on Trusted Manufacturing
Authors: Hu Xiao Mei , Zhang Yang Yang , Zhao Lei , Zhao Li
Published: September 2013

The 21st century is the century of quality. The core of product competitiveness depends on the quality. One of the important issues in the manufacture is how to manufacture high quality products, which cannot only satisfy the demand of users, but also win the competition and make more living space. The existing modern advanced manufacturing modes are summarized and a new mode of advanced manufacturing technology, trusted manufacturing (TM) is put forward. The concept of TM is defined. And differences among TM, concurrent engineering and lean manufacturing are discussed. The system architecture of TM and its features are also proposed. In the end, the goal of TM and the application prospect of TM are described.
Design and Analysis of a New Electrode for Micro-Structure Gas Sensor
Authors: Liu Chang Bai , Bi Ke , Zhang Xiao Bo
Published: September 2013

A novel electrode structure is designed. Through the analysis of the temperature distribution of the gas sensor, the micro-structure gas sensor owns the best temperature distribution when the heating width, measuring electrode width and electrode space are designed to be 50, 20 and 500 μm, respectively. Through the simulation of the magnetic field, the new electrode can eliminate the interference from magnetic field on the measurement signal, which is beneficial to improve the sensor performance.
Design of Large-Stroke Linear Displacement Sensor with High-Precision Based on SS495A1 Technology
Authors: Lou Yun , Zhao Xiang Yang
Published: September 2013

Design of large-stroke linear displacement sensor with high-precision based on SS495A1 technology uses permanent magnet as the excitation source and a series of linear Hall devices as the sensing element. Having been encoded, linear Hall device output signal enters into DSPIC30F3011 A/D conversion to do conversion, and obtains the absolute displacement value after DSPIC30F3011 calculating, and then transmits to the host computer via RS485 to achieve the non-contact, absolute measurement of the linear displacement. The sensor shell and seal have special materials and special processes so that it can function stably under water, especially in the marine environment.
Research on Modulation Multiplexing System and Technique Employing Tilted Grating
Authors: Wang Hui Bo , Li Zhi Quan
Published: September 2013

A dual demodulation technique based on tilted grating and InGaAs photodiode array is proposed; using the coupling modes of the cladding, a wavelength demodulation method with the tilted grating as the spectroscopic device is realized. This method can achieve that the demodulation of the channel in which the sensing information changed and the optimization of collection rules of the system. Two tunable F-P filters scan and demodulate the sensing path simultaneously to further improve the system response speed. Simulation analysis and experiments results indicate that the average demodulation time is 40ms and the average signal frequency can reach 15Hz. In addition, the demodulation bandwidth is 40nm, and its wavelength demodulation precision can reach 20pm. The system has advantages of the shorter delay time, and the demodulation time is immune to the number of channels, etc.. Therefore, this system is able to meet the smart requirement of some complex systems and large scale distributed intelligent system.
Design of Multiple Bus Configuration Monitoring System Based on OPC Technology
Authors: Yu Ling , Wang Jian Ming
Published: September 2013

This paper focused on the same bottom set of field devices, and designed two kinds of field-bus control system, one is PROFIBUS, and another is the Interbus. Applied the OPC technology to realize the information exchange between two bus systems, and applied the PC configuration software, to monitor equipments on the spot. The whole monitoring system included the monitoring program and OPC server program. The monitoring program is no longer included with the specific hardware communication part. The communication monitoring program and hardware are realized by OPC server software, when the system needs to be modified, only need to modify the OPC corresponding part. If the system needs to expand and communicate with the outside world, just need to expand the OPC. After many times field operation, proved the monitoring system of two OPC bus technologies was stable, reliable, and timely control reaction.
Research on the Measurement Error of Portable Braking Performance Tester
Authors: Wei Chao , Nie Miao Xin
Published: September 2013

At present, the automobile brake road test generally adapts the portable braking performance tester. This paper firstly introduces the structure and working principle of the portable braking tester, analyzes the source of error, designs the experiment to determine the error of portable tester, and finally proposes the employment advices to use the portable tester.
Measuring Method for the Signal Distortion of Axial Thrust and Mechanical Vibration Platform
Authors: Wu Shang Sheng , Lin Xiao Meng , Lu Zhen Wei
Published: September 2013

This paper introduced a new mechanical construction for the vibration platform and its working principle. Based on virtual instrument, this paper used sensor, charge amplifier, DAQ(data acquisition card), computer, driver program and LabVIEW software to design signal measuring and analysis system of mechanical vibration platform. This paper used ADAMS simulate vibration platform motion and used LabVIEW calculate distortion degree of acceleration, velocity and position of the vibration platform.
An Improved Algorithm Based on Incremental Insertion in Delaunay Triangulation
Authors: Xi Jian Hui , Zuo Shan Chao
Published: September 2013

Target position is a critical step in the process of constructing Delaunay triangulation. This paper establishes an improved incremental insertion method which realizes fast location based on moving center of gravity along the search direction. It is effective to solve unstable searching path problem usually occurring in some special cases, such as the line from target point to current center of gravity passes through a vertex of a triangle or coincides with a triangle edge. Simulation results show that there exists only location path using this method and the constructing efficiency is increased.
The Calibration of Binocular Stereo Measurement System Based on a Coded Model
Authors: Chen Hong Ming , Zhang Hui
Published: September 2013

A calibration method of binocular stereo measurement system is proposed based on a coded model. Target points are designed to be with the unique IDs which make the match of two pictures and the match of image points and 3D points reliable and stable. The intrinsic parameters of the two cameras are calculated precisely and the 3D target point sets are reconstructed in each camera coordinate system respectively by using the multiple view geometry constraint and a generic sparse bundle adjustment. Then the extrinsic parameters are calculated by using the rigid transform of the two 3D point sets. The accuracy of the re-projection results is 0.037 pixel of standard error.
A Novel Alignment Method for Collimator Based on Laser Differential Confocal Technique
Authors: Li Fei , Li Lin , Hong Bao Yu , Liu Wen Li
Published: September 2013

A collimator is one of the most popular optical instruments used in optical workshop and parallelism of the beams is the key technical indicator of collimator. A great deal of efforts has been expended to ensure reticle locate at the focal plane. In this paper, a new laser differential confocal collimator alignment method is proposed for precision alignment of collimators. Based on this principle an experimental setup is built up and used to align two collimators whose focal lengths are 600mm and 1000mm and f-numbers are both 10.The wave-front parallelism error of the laser differential confocal system and the tested collimator is measured by the verified experiment based on scanning penta prism method. At last some influence factors alignment precision is analyzed. Theoretical analysis and experimental results show that the alighment precision based on laser differential confocal method can reach to 0.004mm.and can be a high-efficiency approach to align collimators, especially in industry production.
Measuring Routine Parameters of Wine by ATR-MIR Spectroscopy
Authors: He Zhong Hai , Duan Xue Rong , Ma Zhen He
Published: September 2013

In this paper, common parameters of wine are measured using attenuated total reflectance Fourier transform infrared spectrometer (ATR-FTIR). ATR cell is used which have the advantage of easy filling and cleaning. The parameters include sugar, alcohol, acid,, sugar-free extract, which is routinely measured in the wine quality determination. Commercial wines (n=125) both red and white were analyzed using the ATR-FTIR spectrometer. Reference data were measured based on standard procedure (GB150382006) and performed by technical analyst. Using PLS calibration method samples concentration can be predicted. The accuracy of quantification of main component such as total acidity, sugar, alcohol was excellent, with the measure error low than 1g/L. Some subdivision components are well, that concentration can be predicted in a lower accuracy. Based on the accuracy we obtained, the presented method can be used in winery widely as a fast method for measuring wines content.
The Design and Implementation of Monitoring System of Flue-Cured Tobacco Barn Based on ARM7
Authors: Liu Jin Hao , He Yong Tai , Peng Yue Hong
Published: September 2013

The disadvatages of traditional pattern of flue-cured tobacco are low work efficiency, high system error, and poor quality of tobacco and so on. In order to conquer the above shortcomings, a kind of monitoring system was designed in flue-cured tobacco barn based on ARM7 to implement the automation and intelligentization of flue-cured tobacco. The LPC2103 chip was chosen as the microprocessor of monitoring system. The data of temperature and humidity of barns was collected with the AM2303 sensor. We built the hardware platform based on embedded technology, and developed the corresponding software system for monitoring the control object of flue-cured barn in real-time, for implementing the automation of three stages flue-cured period which is yellowing stage, turning color stage and stem drying stage. The environmental data of flue-cured tobacco barn could be saved by the storage module .The result of testing experiments, which contain three periods of flue-cured tobacco, show that the features of our monitoring system ,which are nice control precision, lower system error, sooner response ,and good stability and so on, could be taken advantages of. The embedded technology of ARM7 could be used to improve the efficiency of flue-cured tobacco to guarantee the quality of tobacco, and cut the cost of labor, meanwhile, it could be applied to all kinds of flue-cured tobacco barns as well.
Application of Multithreading Technology in the Real-Time Measurement System
Authors: Zhang Ming Hui , Zhang Yao Yu
Published: September 2013

Real-time measurement system possesses high real-time demand which multithreading technology can largely satisfy, because multithreading technology can implement many tasks at the same time and make largely use of the multiprocessor unique advantages. The paper adopts multithreading programming method to improve the real-time system and it achieves significant design effect.
Design of Remote Control Equipment Based on Industrial Ethernet
Authors: Yang Yong Hui , Zhang Bao Yin , Zhang Ni , Gao Chuang
Published: September 2013

In this paper, a scheme of remote control equipment based on Industrial Ethernet is designed, which provides a communication interface selection of remote control for self-development users. This design has the characteristics of simple, flexibility, reliability, and it can be run in Linux system.
Research on Dual PWM Converter for VSCF Brushless Doubly-Fed Wind Power Generator
Authors: Zhu Lian Cheng , He Jian , Yang Yu Jie , Su Xiao Ying , Li Fu Yun
Published: September 2013

Came from the principle of brushless doubly-fed machine, combined the space vector pulse width modulation, modeled bidirectional PWM converter with unity power factor and feed-forward decoupling control using MATLAB/SIMULINK, studied the simulation characteristics, the results confirmed the correctness and effectiveness of the model, and provided reference for further research of the control scheme.
Development of Back-to-Back Flexible HVDC Prototype Based on MMC
Authors: Feng Cheng , Wang Da Li , Li Jin
Published: September 2013

With the development of flexible HVDC technology in the world, back-to-back HVDC system based on MMC topology have more attention. A high power back-to-back flexible HVDC prototype has been developed to assess performance and reliability of construction of converter valve segment. Valve normal working condition (rated conditions rated voltage, current, temperature), valve transient working condition (temporary overvoltage, overcurrent), valve fault protection and anti-interference ability are accessed. Performance and reliability of control and protection equipment are assessed. The design of control and protection strategy is optimized. The correctness of main circuit design is tested.
Design and Application of High-Power LED Drive and Control Circuits
Authors: Li Chen Wu , Zhang Jian , Ou Hao Yuan
Published: September 2013

LED (light emitting diode) is a solid luminescent source of fairly wide uses, a type of electronic components capable of transforming electric energy to luminous energy, which, emitted from LED, is highly centralized and strongly directive. LED can be driven simply by low-voltage direct current. This paper chiefly introduces the actualization of drive circuits by the constant current pattern, and proposes a type of high-power LED constant current drive solutions based on the constant current drive circuit PT4115. This drive circuit is simple, highly efficient and cost effective, suitable for the market demand of solar energy products.