bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Measurement Method of Soil Surface Roughness
Authors: Zheng Zi Cheng , He Shu Qin
Published: November 2011

Based on the determination method of the comprehensive domestic and international surface roughness, by the method of indoor artificial rainfall, the determination of soil surface roughness had been studied from the measurement accuracy, time-consuming and resolution. The results showed that the laser scanner method was the best to determine the surface roughness, followed by pin meter method, the roller chain meter method, and the ruler was the worst. The results of determination had the better correlation between the laser scanner method and the roller chain meter method before rainfall, however they had poor correlation after rainfall. They had the better correlation between the laser scanner method and pin meter method both before rainfall and after rainfall. And on this basis, the relationships were established among the different methods. The results provide theory basis for the further study on soil surface roughness. At the same time, it would serve for harnessing soil and water loss of the slope farmland in Loess Plateau.
An Innovative Drive Train Design for Improved Dead Reckoning Accuracy in Automated Guided Vehicles
Authors: Muniandy Murelitharan , Muthusamy Kanesan
Published: November 2011

The automated guided vehicle (AGV) is a key component for the successful implementation of flexible manufacturing systems (FMS). AGVs are wheeled mobile robots (WMR) employed for material handling in the constantly evolving layouts of these modern factory shop floors. As such their ability to navigate autonomously is an equally important aspect to sustain an efficient manufacturing process. However, their mobility efficiency is inherently affected by the unproductive systematic and non-systematic odometry errors. Odometry errors mainly occur due to the mobility configuration of the AGV drive train and the surface characteristics the robot is interacting with. Odometry error accumulates over the distance traveled and leads to severe dead reckoning inaccuracy if the robot’s feedback control mechanism is unable to correct the error fast. This paper proposes an innovative drive train mechanism called dual planetary drive (DPD) that will minimize odometry errors without the need for complex electronic feedback control systems
From Topological Views Observe Collision Phenomenon in F1
Authors: Liu Hong Wei
Published: November 2011

In this paper, we mainly make use of path connectedness in topology to study how to set movement route of cars in F1 Racing, such that cars can change their direction effectively and safely and avoid colliding with each other. In particular, we consider the change of speed and direction after the change of position when the cars drive on linear,Y-shaped and circular routes.
The Use of Mixture of Piper Betle and Green Tea as a Green Corrosion Inhibitor for API X-52 Steel in Aerated 3.5 % NaCl Solution at Various Rotation Rates
Authors: Rustandi Andi , Soedarsono Johny Wahyuadi , Suharno Bambang
Published: November 2011

Flow induced corrosion due to the presence of turbulent flow often occurs which causes severe internal thinning and promotes premature leakage. In practice, the common method for controlling such internal high corrosion rate is chemical injection using corrosion inhibitor such as amine based which utilizing adsorption or film forming mechanism. Unfortunately, the protection performance of such inhibitor might be less effective due to turbulent flow induced. The aim of this work is to study the use of mixture of piper betle and green tea as an alternative of green corrosion inhibitor (eco-friendly) to reduce the corrosion rate of API X-52 steel in aerated 3.5 % NaCl solution in turbulent flow condition whether high inhibitor efficiency can be achieved. The method of corrosion rate measurements was conducted using electrochemical polarization equipped with CMS100-Gamry Instruments and DC105 software as well as Rotating Cylinder Electrode (RCE) simulation. The mechanism of inhibition was also investigated using Electrochemical Impedance Spectroscopy (EIS) method with EIS300 software. The results showed that the addition of mixture of 1000 ppm piper betle and 4000 ppm green tea extracts with Reynold number ranging from 0 up to 30000 reduced the corrosion rates significantly with its approximately 90 % inhibitor efficiencies achieved. In addition, EIS spectra showed that in the absence of corrosion inhibitor, the Warburg impedance (diffusion controlled) was significantly attributed to the overall impedance but in the presence of corrosion inhibitor, capacitive impedance (charge transfer controlled) was mainly attributed to the overall impedance.
A Study on the Effect of Different Median Barrier Shapes in Presence of Single or Parallel Noise Screens
Authors: Monazzam M.R. , Fard Samaneh M.B.
Published: November 2011

In most mega cities roadside barriers are used to protect receivers from noise pollution during recent years. Median noise barriers, like roadside noise barriers, can be employed to reduce the impact of traffic on roadside communities. In this study, a 2D boundary element method (BEM) is used to predict the insertion loss of different barrier models. It was shown that the performance of a median barrier along with a roadside barrier is affected if another road side barrier will be erected. However, it is possible to apply some new barrier designs to decline the negative effect of the extra roadside barrier. The best shape for inclined median barriers when erected inside parallel barriers was seen to be the tilted designed with 10 degrees slope.
Dynamic Topology Optimization for ATP Hanging Beam of EMU Bogie Based on Hyperworks
Authors: Wan Chao Yan , Li Xiao Feng , Li Jun Yong , Liu Ying
Published: November 2011

To achieve the damping design of an EMU bogie, the dynamic topology optimization is performed to the ATP hanging beam of bogie. Based on the HyperWorks / OptiStruct platform,the static and modal analyses on ATP are realized with the help of the finite element method. Then, the dynamic topology optimization is carried out in which improving the first natural frequency by variable density method is the optimization objective and the volume fraction and stress are the constraints. This optimization improves the structure and increases the natural frequency of the hanging beam. The design requirements are therefore satisfied. With the rapid development of high speed intercity rail, it's time to solve the security risk problem of trains. Using as the key components of high-speed bogie, more reasonable, safer and more reliable structure of ATP (Automatic Train Protection) hanging beam is needed by means of structural optimization, since it can improve the natural frequency of structure and increase the life of hanging beam on the hypothesis of meeting the fatigue strength conditions. Structural optimization design is a modern design manner combining the optimization techniques with the finite element analysis technology. In accordance with the degree of difficulty, it can be divided into size optimization, geometry optimization and structural topology optimization. The structural optimization design is the most challenging area because of the complexity of theory and calculation [1]. With the development and progress of technology, the dynamic characteristics of topology optimization for structures (including the natural frequency, mode shape, damping and stiffness and mass distribution, etc.) are attracted more and more attention[2]. The research focus mainly concentrates on the engineering applications [3-6]. In this paper, the dynamic topology optimization to the ATP hanging beam on a bogie is implemented by using the advanced structural optimization software named HyperWorks based on HyperWorks / OptiStruct platform [7]. An effective improvement plan of the ATP hanging beam is also introduced.
Detoxification of Wheat Straw Formic Acid Hydrolysis and Xylitol Production
Authors: Zhuang Jun Ping , Lin Lu , Yong Sun , Pang Chun Sheng
Published: November 2011

Xylitol can be obtained from hemicelullosic fraction of lignocellulosic materials containing D-xylose. Formic acid hydrolysis is widely used in lignocellulose pretreatment. However, formic acid hydrolysis wheat straw cannot be directly used as fermentation subsequently owing to various fermentation inhibitors, especially the formic acid in reaction system and released during pretreatment. This study describes main hydrolysis components and inhibitors prepared by hydrolysis of wheat straw with formic acid solution, and different detoxification methods ware used to romve the inhibitors. Study found treatment of wheat straw hydrolysate with overliming treatment and D311 ion-exchange resin had a good result on reduction formic acid and other main inhibitors, results showed which can eliminate 94% of residual formic acid and with only 15% reducion of xylose. To verify the effectiveness of different detoxification methods, hydrolysates of detoxification werr fermented by Candida.tropicalis AS2.1776, and the results also found that the hydrolysate treatmented with overliming treatment and D311 ion-exchange resin have the hightest xylitol yield.
Image Calibration and Correction for a Fisheye Lens
Authors: Sun Qi Yuan , Jiang Ping Ge
Published: November 2011

Fisheye lens as an image sensing is for extensive field such as navigational fixing of a mobile robot or an intelligent vehicle and so on. Since a fisheye imaging with wide visual angle can result serious image distortion especially at the image edge, so it is required to be corrected. The center and radius of a fisheye image should be determined before conversion from a fisheye image to a perspective image. Therefore, a method using least square fitting circle is presented in this paper to calibrate the center and radius for images of a fisheye lens, also a cylinder projection model is established to correct a fisheye image. The experimental results prove validity of the proposed methods.
Design and Research of Crash Sense Module of Vehicle Emergency Call System
Authors: Jiang Hong , Li Mei , Li Zhong Xing , Zhang Shao Bo
Published: November 2011

Crash sense module of vehicle emergency call system determines whether or not the system can sense accurately the accident happened in time. Based on the function requirements of crash sense module, this paper researched on its software and hardware so that implemented the serial communication between MCU and LabVIEW. And the result of sled crash test shows the reliability of software and hardware of crash sense module.
Design of Building Heating Supply Energy-Saving Control System Based on Information Fusion
Authors: Zhang Gui Qing , Zhang Lin , Wang Ming , Shen Bin , Li Cheng Dong , Yan Qiao
Published: November 2011

An energy-saving control system for building heating supply system is presented in this paper. Its design and implementation are on the basis of occupancy detection in buildings. By taking advantage of the information fusion technology, the control system will determine human’s location and control the heating equipments automatically according to non-human zone and human zone to realize the energy saving. The information fusion technology fuses three categories of information, which are the people counting information, the infrared sensors information and the RFID information. How to design and implement the heating energy-saving control system is described explicitly in this paper. Since the system has developed with platform concept based on the wireless network and the Internet, it can be used to other building electrical equipment systems with less modification.
Comparison of the Computing Method for the Radial Temperature Difference of a Supercharged Boiler Steam Drum Shell Based on the Approximate Solution and the Current Chinese Standard
Authors: Zheng Xin Wei , Li Zheng , Wang Hao , Chen Xiu Hui , Zhang Dong Yang , Wen Xue You
Published: November 2011

The radial temperature difference calculation of a steam drum shell is an important step in the process of calcu-lating its heat stress, so the current Chinese Standard recommended a computing method which was derived from the further modification to the simplified solution for the radial temperature of a steam drum shell. In order to derive the feasibility for the application of the current Chinese Standard computing method to a supercharged boiler, the computing method for the temperature difference of a steam drum shell, which was based on the approximate solution for the radial temperature of a steam drum shell and highly approaches to its analytic solution, was exercised. By analysing the computed results of examples, the conclusions show as follows: The current Chinese Standard computing method for the radial temperature difference of a steam drum shell can’t meet the calculation requirements of all the running work conditions and their courses of a supercharged boiler, and as a universal computing method, it can’t serve as a computing method for the same problem of a supercharged boiler. Whereas the approximate solution can apply to calculating the same problem of a supercharged boiler and a peak shaving utility boiler. Thereby the basis is offered for the selection and usage of the computing method for the radial temperature difference of a supercharged boiler steam drum shell, the pioneering researches on its interrelated problems and prac-tical applications.
The Study on Ergonomics-Based Design of Flood Survival Kit
Authors: Zhang Lu Lu , Wang Xuan , Nie Lu
Published: November 2011

As life-saving facilities for individual and family in current domestic market is almost blank, this paper, using the theory of man-machine engineering, makes human, machine and environment as a whole to give a comprehensive analysis among flood audience, rescue production and environment. According to the audience’s physiological and psychological demand, it puts forward the concept of flood survival kit. With detailed description of its content, material, color and size, the paper provides a more humanized point for the design of flood survival kit.
Soft Magnetic Composite Switched Reluctance Generator - Fabrication and Analysis
Authors: Karthikeyan R. , Vijayakumar K. , Arumugam R.
Published: November 2011

The main objective of this paper is to investigate the suitability of Soft Magnetic Composite (SMC) material SOMOLOY1000 for a Switched Reluctance Generator (SRG) through electromagnetic, thermal and vibration characteristics employing extensive Finite Element Analysis. The fabrication aspects of Soft Magnetic Composite Switched Reluctance Generator (SMC-SRG) using preform material blanks utilizing indigenous machining process have been delineated. The static and transient electromagnetic characteristics have been obtained through the electromagnetic finite element analysis software MagNet6.22.1 while the thermal and vibration aspects have been studied through coupled field Finite Element Analysis employing the multi physics software ANSYS10 while the Impulse hammers excitation - free vibration test using RT Pro Photon data acquisition system facilitated the experimental determination of vibration characteristics. The study concludes that the advantages of less weight , low torque ripple, low eddy current losses, reduction in vibration level of stator structure coupled with the ability to maintain precise mechanical dimensional tolerance may present SMC-SRG a viable candidate in standalone wind energy conversion systems meant for rural and remote area electrification scheme.
Fabricating Anodic Aluminum Oxide by Anodic-Oxidation
Authors: He Ji Yan , Ren Jian Dan , He Yan Bin
Published: November 2011

Uniform parallel pores and controllable pore diameter make Anodic Aluminum Oxide (AAO) membrane one of the best materials in synthesis of one-dimensional nano-structured material. High orderly AAO template was prepared by anodic-oxidation. The prepared AAO membrane’s apertures ranged from 30 nm to 75 nm. Within a few microns, holes were orderly arranged. The fabricating methods of AAO template in different electrolyte were studied and the factors which affect the pore distribution, such as electrolyte types, voltage and concentration were discussed.
RLV Attitude Control System Design in Reentry Flight Phase
Authors: Ji Peng Fei
Published: November 2011

In reentry flight phase of reusable launch vehicle (RLV), its aerodynamic characters alter sharply, going with serious uncertainties and nonlinearities. These factors make the reentry attitude control technique be one of key technique for RLV. In this paper, the sliding mode variable structure control technique is used for reentry attitude control. A specific switch function is defined; a specific exponential reaching law and continuous analogy of sign function are chosen to weaken the chattering brought by the variable structure control technique. RLV is equipped with aerosurfaces and reaction control system (RCS), the arithmetic based on dynamic pressure change is presented. Six-freedom nonlinear simulation with great gain and high frequency disturbance proves that the reentry attitude control technique performs very well, and its control accuracy and robustness are brilliant.
An Experimental Investigation of Flow Characteristics Downstream of Discrete Film Cooling Holes on Turbine Blade Leading Edge
Authors: Li Shao Hua , Qu Hong Wei , Wang Mei Li , Guo Ting Ting
Published: November 2011

The gas turbine blade was studied on the condition that the mainstream velocity was 10m/s and the Renolds number based on the chord length of the blade was 160000.The Hot-film anemometer was used to measure the two-dimension speed distribution along the downstream of the film cooling holes on the suction side and the pressure side. The conclusions are as follows: When the blowing ratio of the suction side and the pressure side increasing, the the mainstream and the jet injection mixing center raising. Entrainment flow occurs at the position where the blade surface with great curvature gradient, simultaneously the mixing flow has a wicked adhere to the wall. The velocity gradient of the u direction that on the suction side increase obviously, also the level of the wall adherence is better than the pressure side. With the x/d increasing, the velocity u that on the pressure side gradually become irregularly, also the secondary flow emerged near the wall region where the curvature is great. The blowing ratio on the suction side has a little influence on velocity v than that on the pressure side.
Multi-Model Adaptation Fuzzy Control for the Deep Sea Walking Hydraulic Control System
Authors: Meng Qing Bo , Yin Yi Xin , Qiao Gui Ling
Published: November 2011

To accommodate deep sea walking wheel the complex characteristics of deep sea environment such as randomness, non-linear and variability, the algorithm of Multi-Model-Reference Adaptation Fuzzy Control is presented to run the walking wheel system steadily. This control method incorporates the multiple reference models, fuzzy control and the conventional PID control; it runs efficiently by the control compensation deduced by the error of different phase-plane zones with the guidance of reference models.
A Design of TRT Hydraulic Servo Controller Based on DSP
Authors: Wang Yan Nian , Gao Xia , Chen Hong
Published: November 2011

The composition and working principle of electric hydraulic servo control system are briefly described. A program is designed about digital servo controller based on DSP structure, and the servo system is achieved to control position by using TMS320LF2407A’s powerful digital processing capabilities, rich peripheral interfaces and optimal control algorithm of deviation, meanwhile it also has complete self-testing, setting parameters online and other functions. It is shown that the digital servo controller runs reliably, achieves real-time and precise control effect, and can meet the TRT and other systems’ control requirements with the experimental results.
A Novel Speed-Sensorless Suspension Decoupling Control Strategy for Bearingless Motor Based on Linear Extended State Observer
Authors: Ding Qiang
Published: November 2011

In this paper, a novel speed-sensorless suspension decoupling control strategy for bearingless motor was proposed based on linear Extended State Observer (ESO). In the proposed control strategy, a second-order and a third-order linear-ESO algorithm were added respectively into torque d-q axis current-loop and suspension system x-y direction displacement-loop. A product of electrical angular speed and torque system d-q axis current and a product of torque q axis flux and suspension system d-q axis current were defined as disturbances in order to use the linear-ESO algorithm to estimate the defined disturbances. By obtaining speed information and compensation for disturbance force, the motor can work on speed-sensorless condition and traditional decoupling algorithm can be simplified. The simulation results show that the proposed control strategy can realize accurate speed estimation and guarantee stable suspension under the rated speed.
Study on B/S-Based Remote Fault Diagnosis System of Radar Equipment
Authors: Sun Zhi Jian , Zhang Xian Zhi , Sheng Wen , Liu Shi Hua
Published: November 2011

This paper discusses a Web-based remote radar fault diagnosis and information system . A delicated radar network is set up with knowledge base and Web . The various key points about the structure , the function module and the key technology of the remote diagnosis system are analyzed and developed . In this way the real-time monition and automatical fault and diagnosis are realized , the reliability of the radar and the emergency repairing ability is improved .
Finite Element Analysis of Drive Axle Housing Based on the Solid Element and the Shell Element
Authors: Fu Jing Shun , Wang Jun Feng , Wang Jin
Published: November 2011

The finite element model of drive axle housing was built by using the solid element and the shell element respectively. Vertical bend strength and stiffness under 2.5 times of fully load of the drive axle housing were calculated by finite element method. By comparing the results of the vertical bend strength and stiffness of both models, we could know that both of the two models can be used to analyze the whole stress situation of drive axle housing. Because there were fewer elements of drive axle housing model based on shell element, the amount of final calculation was less. It is more feasible to analyze the whole stress situation of drive axle housing by establishing drive axle housing based on shell element.
Numerical Simulation of Covered Culvert at Jinan Section in South-to-North Water Diversion Project
Authors: Wang Xiao Ling , Zhou Zheng Yin , Sun Yi Chao , Li Tao
Published: November 2011

A 3D model coupled with the Volume of Fluid (VOF) method of water-air two-phase flow is applied, and the roughness of walls is considered. The water-air two-phase flow simulation of the covered culvert is carried out while Jinan section of first-phase in east line of south-to-north water diversion project is taken as a case. The flow field of inverted siphon is discussed. The flow of inlet and outlet transition sections is gentle; the velocity distribution is nonuniform and the pressure distribution shows layered on current cross section. The water depth along the channel is downward.
Control Simulation Study Based on Recurrent Generalized Congruence Neural Network
Authors: Yan Tian Yun
Published: November 2011

In order to meet the real-time demand of neural network control system, the structure and algorithm of self-tuning PID control system based on recurrent generalized congruence neural network(RGCNN) with fast convergence are presented, in which the improved recurrent generalized congruence neural network is adopted for identifier, and the single generalized congruence neuron with three inputs is used as controller. The simulation results of nonlinear dynamical control system show that the proposed RGCNN control system responses quickly and is stable, i.e., the proposed control system based on RGCNN is effective and feasible.
Simulation of a Regenerative Braking System Producing Controlled Braking Force
Authors: Hong Jiang , Zhang De Wang , Wang Guang Pin , Sui Ni
Published: November 2011

The pure electric vehicles (PEV) research is mainly focus on regenerative braking. How to improve the efficiency of battery power utilization and increase vehicles’ driving range is a crucial problem. Based on the analysis of braking feeling, super capacitor characteristics and the efficiency of regenerative braking energy recovery, the control strategy of regenerative braking system is firstly established, which has two objective functions. One is to control the regenerative braking force. The other is to improve the recovery efficiency of regenerative braking energy. Then, the main operating mode of regenerative braking system is presented. On this basis, regenerative braking controller that is based on DC-DC controller is designed and implemented in simulink software. The results show that the regenerative braking control strategy can effectively control the regenerative braking force during braking and increase driving range of electric vehicles
Research on the Cutting Path Planning of Shearer Based on Expert System
Authors: Mi Jin Peng , Tan Chao , Quan Guo Tong
Published: November 2011

According to the characteristics of shearer working environment and cutting work, on the base of analyze the working principle of shearer working, use the expert system theory to achieve cutting path planning. Used rule-based knowledge representation, adopted PROLOG language to compile the path planning network, knowledge acquisition used the design method based on rule skeleton and rule body and generated shearer cutting path planning knowledge base, through modifying the internal predicates can be easily achieved the knowledge base modify, storage and maintenance. Experimented in the model of MG900/2210 electrical haulage shearer 1:6 prototype, the experimental results showed that the cutting path planning can effectively improve the working reliability of shearer, by combining with human-machine interaction and remote path correction to solve the problem which can’t be solved through memory cutting and drum automatic adjustment height.
The Synchronization Control of the Hydraulic Press Brake Based on the Virtual Shaft Control Algorithm
Authors: Liu Guang Fei , Li Su Ling , Zhang Lei
Published: November 2011

This paper simulated the virtual master shaft based on the analysis of the working principle and the existing problems of the hydraulic press brake as well as based on the application of the virtual shaft algorithm in motion control, which directly drive the synchronous system of the hydraulic press brake. We established the model of the virtual master axis and the model of the hydraulic press brake which based on the virtual shaft algorithm, and simulated the models in Mat lab. We obtain the better effect in the accuracy and combination property.
Parameters Design of Main Circuit of AC Constant Voltage Power Supply Based on Dual Directional Reversible PWM Control
Authors: Ma Yu Quan , Zhang Li Hong , Han Shu Fen , Lin Zhi Peng
Published: November 2011

The constant voltage power supply with dual directional reversible PWM compensation has merits of high precision, high efficiency, small volume, and so on. To ensure the quality of supply, it is important to fix the value of inductance, capacitance in main circuit. From the angle of filtering, and through analysis of the circuit working, detailed formulas of the inductance and capacitance calculation are given and an example of it is given too. In parameters calculation, to reduce the volume, the filter inductance is taken a smaller value but the capacitance is taken a greater value; the DC smoothing capacitance should be chosen according to the amplitude limit of DC voltage rising in inversion, and should be taken as great as possible to maintain voltage stabilizing precision.
The Research on Application of AT-DESIGN-Based Textile CAD/CAM System
Authors: Ren Xue Ling
Published: November 2011

With the popularity of digital technology, textile CAD/CAM design system have been applied extendedly and progressed greatly. AT-DESIGN is one of the several software regarding clothes and printing design in domestic market. From the view of a designer, this paper analyzes problems, commands defaults and other shortcomings exiting in textile CAD/CAM system which is based on AT-DESIGN. Moreover, future development goal and suggestion are given.
A Nonlinear Controller for PMLSM Control System Based on Tracking Differentiator
Authors: Yan Guang Ya , Ai Wu , Chen Bing
Published: November 2011

This paper introduces tracking differentiator based on the classical PID control in order to arrange the transitional process according to the set point and control system parameters, solving the contradictions between speed and overshoot of the manipulated variable in the traditional PID control. At the same time, tracking differentiator provide an effective method of calculating differential with low noise amplification. Nonlinear PID controller adopts a nonlinear combination of error, error differential and error integral to calculate the controlled variable in a very effective way. Applying this kind of nonlinear PID controller to the permanent magnet linear synchronous motor control system , the experimental results show that PMLSM can follow the speed command quickly in no overshoot, and has strong robustness, good static and dynamic characteristics.
Sliding Mode Variable Structure Control Design for a Kind of Nonlinear Discrete Singular Uncertain Systems with Time-Delay
Authors: Wang Yong Xu , Zhang Cai Hong , Gao Cun Che
Published: November 2011

In this paper, the quasi-sliding mode variable structure control problem for interval coefficients nonlinear discrete singular uncertain systems with time-delay is researched, and it can be decomposed to two lower dimension systems with ordinary coefficients. According to some results on robust stability of discrete singular systems with time-delay, the quasi-switching manifold with difference compensator are designed, then with the quasi-sliding mode variable structure control law, the system comes to stability. At last, the feasibility and effectiveness of the results are explained by a numerical example.
An Integrated Design and Fabrication Approach for Heterogeneous Objects
Authors: Zhu Yu Fang , Peng Chen , Yang Ji Quan , Wang Chang Ming
Published: November 2011

A novel method for the design and fabrication of heterogeneous objects is presented, which combines the Three Dimensional Printing (3DP) and micro droplets dispensing technology. It provides a solution to the fabrication of assemblies with multi materials, which can not be fabricated by traditional processes. An integrated design and fabrication system for heterogeneous objects based on the new process is introduced. Its constructive representation scheme is described. To show the effectiveness of the working process of multi-materials, based on slice software of color STL model and developing prototyping system, an example is shown to illustrate the entire design-fabrication cycle for heterogeneous objects.
Optimization Design of Φ355 Automatic Feed Mechanism Based on ADAMS
Authors: Chai Xiao Yan , Zhang Xian Feng
Published: November 2011

In this paper, the ADAMS Softwares is applied to the optimization design of the Φ355 automatic feed mechanism. After the optimization, the maximum and average lifting forces are reduced by 60.2% and 48.3% respectively. In addition, dramatic declines of 54.7% and 49.0% in the maximum and average propulsive forces are made, which saves energy significantly.
A New Teaching Method in a Kind of Industrial Palletizing Robot
Authors: Yao Meng , Han Bao Ling , Luo Qing Sheng , Lv Ting Qiang , Xu Jia
Published: November 2011

A new method of teaching method has been proposed for the palletizing robot. The principle of the method has been elaborated and a new algorithm about this method has been proposed. The servo control system is used to carry out this method. The practicability and conciseness of this method has also been analyzed through the simulation with soft Admas and real experiments. The results of simulation and real experiments prove that this novel method is feasible and can meet the practically industrial demands.
The UML Model for Access Management System of Intelligent Warehouse Based on RFID
Authors: Zhu Quan Yin , Zhou Hong , Shi Xiao Chun , Hu Rong Jing
Published: November 2011

As the RFID (Radio Frequency Identification) technologies developing fast, it is used widely on application domain nowadays. The UML model design for Data Access Layer (DAL), Business Logic Layer (BLL), and Service Layer are introduced in detail. The SOA architecture selected for the access management system design is applied for the service program and integrated into Web service applications. The MyEclipse 8.5 and MySQL5.0 database are opted to be the development environment. The C/S design pattern is used to achieve data collection from RF tag and store the synchronization service program. Furthermore, the godown entry and the outbound order are automatically produced respectively. On the other hand, the B/S model is selected for Web services applications.
Characterisation of Microstructure, Mechanical Properties and Corrosion Behaviour on GTA Welded AISI 310 and Inconel 800
Authors: Yeshwanth B.K. , Senthil Kumar S. , Hafeez Sharief B. , Devendranath Ramkumar K. , Narayanan S. , Arivazhagan N.
Published: November 2011

The current work was carried out to characterize the welding of austenitic stainless steel AISI 310 steel to Inconel 800 alloys by Gas Tungsten Arc (GTA) welding using Inconel 600 filler wire. Tensile test shows that failure has occurred in heat affected zone of AISI 310 and its strength was lower as compared to the base metal. In addition the SEM fractographs showed the micro void with some dimple structure which ensures the fracture is ductile in nature. Furthermore the maximum hardness value was found at the weld interface of AISI310 due to the formation of chromium-carbide. The microstructure revealed a considerable change in the grain size and orientation of the Heat Affected Zone (HAZ) in both sides of the weldment than that of the parent metal. Moreover the corrosion test was also carried out in the welded samples both in air and molten salt of Na2SO4 – 50%NaCl at 700 °C. The weld zone corroded less readily in the air and molten salt than that of the base metal. It can be concluded that these joints could be used effectively at aggressive environments without compromising the strength.
Investigation of a Plasma Jet Generated by High Voltage Discharge at Atmospheric Pressure
Authors: Li Xue Chen , Yuan Ning , Jia Peng Ying
Published: November 2011

Appling a high voltage to the dielectric barrier discharge device in a coaxial geometry in flowing argon, a uniform plasma plume is generated at one atmospheric pressure. The waveforms of discharge current and the applied voltage are investigated and results indicate that both the intensity and duration width of the discharge current pulse increase with increasing the applied voltage. The gas temperature of the plasma plume is investigated by using an infrared thermometer. The gas temperature of the plasma plume are functions of gas flow rate, peak value and the frequency of the applied voltage. Results show that the gas temperature increases with increasing the applied voltage or its frequency, while it decreases with increasing the gas flow rate. A qualitative explanation is given for the variance of gas temperature as functions of the experimental parameters by analyzing the waveforms of the discharge current and the applied voltage.
A New Engineering Model of Solar Array and MPPT Control
Authors: Wang Xiao Lei , Yang Liang , Yan Pan
Published: November 2011

An engineering model of solar array can reflect the real-time output voltage and current, the maximum power point voltage, the maximum power point current and the maximum power point in any light intensity and any temperature of solar arrary. A simulation model is established in Matlab/Simulink and proved the engineering model correctly and reliability. Using the method of Perturbation and Observation (P&O) and Incremental Conductance (INC) track the maximum power point of a solar array under the reference standard of these output elements, and found out the pursuit gain around the reference standard oscillation and further to validate the model's reliability.
The Research of Air Purification under Complex Electric Fields
Authors: Chen Jun Hua , Tao Li , Gu Ping Dao , Yang Zi Bing
Published: November 2011

A set of experimental device is built，to research the air purification under high voltage and high frequency complex electric fields. The results show that the half time TH will drop while the initial concentration of the aerosol particles reduces in air conditioning room, under high voltage and high frequency complex electric fields only or under the joint action of high voltage and high frequency complex electric fields and the filter. Compared with high voltage and high frequency complex electric fields only，the half time TH is observably reduced when they work together. The time of indoor air purification of air conditioning is greatly shortened. While the initial concentration of the aerosol particles is same, the diameters of aerosol particles are larger; the half time TH is less. The aerosol particles easily removed and the time of air purification is shorter.
Design of Mining Portable Static Resistance Strain Gauge Based on ATmega16L
Authors: Sun Qian , Guo Feng Yi , Li Bin , Yin Fei , Xu Peng
Published: November 2011

Mining portable static resistance strain gauge based on ATmega16L is introduced in this paper. It is used to monitor stress of bolt support in coal mines. The strain gauge is high-precision, simple and Chinese-displaying. It offers a more portable testing method of bolt support in coal mines for the workers.
Probabilistic Harmonic Load Flow Calculation Containing Doubly Fed Induction Generator
Authors: Wu Jie , Yan Bing Chao
Published: November 2011

In this paper, based on the analysis of the basic electromagnetic relation for the doubly fed induction generator (DFIG), the fundamental and harmonic equivalent circuits are presented. The harmonic propagation from the stator to the rotor side and in sub-synchronous mode and super-synchronous mode is explained. The model of probabilistic harmonic load flow equivalent circuits for DFIG is presented. Then, the influence of the harmonic from DFIG to a small power system are analysed. Finally, according to the harmonic characteristics of wind turbine, the concept of the probability density function of total harmonic distortion (PDFTHD) is proposed. The impacts on power grid from harmonic propagated by DFIG are analysed by the PDFTHD of each node after the probabilistic harmonic load flow.
Fixed Frequency Hysteresis Control Based STATCOM
Authors: Zhang Jun Li , Li Jian Zhuo , Zhang Yu Ren
Published: November 2011

The operation principle of STATCOM (Synchronous Static Compensator - STATCOM) is analyzed. To improve STATCOM response speed, and to sustain the STATCOM main circuit switching device operating frequency stability, the direct current control method is introduced. Fixed frequency hysteresis control method based on the traditional hysteresis control strategy is proposed. The proposed strategy is simple, high precision, fast response speed, while it has less fluctuation with the impact of load parameters, and good robust characteristics.
Parameter Identification of PMSM Based on Windowed Least Square Algorithm
Authors: Wang Song , Zhao Rui Jie , Chen Wei Min , Li Guang Da , Liu Chao
Published: November 2011

In this paper, two least square algorithms, Recursive Least Square (RLS) and Windowed Least Square (WLS) are applied to identify the parameters varying with temperature of Permanent Magnet Synchronous Motor (PMSM). In order to compare the identification effects of the two algorithms, a PMSM model is built and simulated in MATLAB. And simulation results demonstrate that WLS guarantees better timeliness and rapidity.
Research on Control System of Gearless Permanent Magnet Synchronous Traction Elevator
Authors: Hu Yan , Guang Zhen , Wang Xiao Yu
Published: November 2011

A driving system for gearless traction machine plays an very important role in controlling elevator’s running. And its performances have a direct effect on the elevator’s performance. On the basic of the mathematical model of the gearless permanent magnetic synchronous machine (PMSM), id=0 vector control method and space vector pulse width modulation method are used in the control system. Then making a simulation on the system designed by MATLAB/SIMULINK. The simulation results show that the control method is feasible.
Study of Direct Torque Control Technique on High-Capacity Motor Drives
Authors: Zhao Hong Ge , Zhu Jing Wei , Fan Yin Hai , Zhang Xiao Chen
Published: November 2011

The problems existed in the traditional control strategy of Direct Torque Control (DTC) system on high-capacity motor drives and the internal causes resulted in these problems were analyzed deeply in this paper. Combining the research result of Regional Interpolation method and the real requirement of ship electric propulsion system, a brand new DTC self-adaptation control system for high-capacity motor drives is proposed and verified by the real system parameters. The system can not only satisfy the requirement of the real operation condition of ship motion control, but also show good performance in improving dynamic index and reducing electromagnetic torque ripple.
Second Order Sliding Mode Control of Direct-Drive Ring Permanent Magnet Torque Motor
Authors: Sun Yi Biao , Jing Ya Nan , Xia Jia Kuan
Published: November 2011

The direct-drive ring permanent magnet torque motor is easily affected by parameters changes and the load torque disturbances, which reduces the servo performance of the system. In order to enhance the robustness of the servo system, the super twisting algorithm based on the second order sliding mode control (SMC) is proposed as the speed controller of the direct-drive servo system. The super twisting algorithm need not know the information of the sliding mode time derivative, which through the continuous control measure the sliding mode and its derivative approach zero in finite time. This method not only guarantees the robustness of the servo system and eliminates chatting, but also enhances the static precision of the servo system. The simulation results show that the servo system of the direct-drive NC rotary table has a very strong robustness by adopting the control method against parameters changes and the external disturbances.
Series Charge-Discharge Management for LiMn2O4 Power Batteries
Authors: Hu Yin Quan , Liu He Ping
Published: November 2011

Battery management hardware platform for LiMn2O4 power batteries group was built, based on features of car battery series charge-discharge. A novel batteries group management method was presented. Every power battery voltage, temperature and current will be detected by the centralized detection system, and use CAN communications to transfer data to touch screen microprocessor. The data of detection will be analyzed and dealt with, battery charger and motor controller will be monitored and controlled by touch screen microprocessor too. This will discover rapidly behind the battery, and avoid power battery overcharge and over discharge. The reliability and practicality of LiMn2O4 power batteries group management system are testified by experiments, and finally obtain some crucial experimental parameters and outcomes.
Optical Flow Sensor Designed for Altitude-Holding Flight
Authors: Liu Xiao Ming , Chen Wan Chun , Yin Xing Liang , Xing Xiao Lan
Published: November 2011

An optical flow sensor is fabricated by using an optical navigation sensor as its core chip. The design process is detailed and an optical flow testing platform is designed to test its performance and calibrate its basic parameters. Then the optical flow sensor is introduced to the altitude-holding control loop of a cruise missile and a hardware-in-loop simulation is demonstrated. The simulation result verifies the sensor’s effectiveness in the low-altitude penetration.
The Maintenance Strategy of Electric Equipments Based on the Least Average Annual Cost
Authors: Huan Jia Jia , Li Bo , Li Hai Feng , Wang Gang
Published: November 2011

With the enlarging scale of power grids, the quantity of electric equipments is increasing and their quality is improving. Therefore, the optimizing management of equipments, which is an important act to reduce investment and increase economic benefit of power grids, has been paid more and more attention. This paper makes a comprehensive analysis of factors that influence the life cycle cost of electric equipments. Considering the risk of power grid caused by the fault of equipments and other relevant factors, the economic life model is established and the judgment about the optimal maintenance strategy is proposed. The proposed maintenance strategy is conducive to save the operating cost of power grids and optimize the investment. Also, it can promote the refined management and provide reference decisions for electric utilities to plan and adjust equipments operating better.
Improved Structural Design and Digital Control System for Micro-Machined Tuning Fork Gyroscope
Authors: Wen Jiao , Liu Xiao Ming , Zhu Zhong Gan , Cai Ming
Published: November 2011

This paper proposes an improved design of micro-machined tuning fork gyroscope (M-TFG) to better decouple the cross talk between the driving and sensing directions and to increase resolution. By employing dual-folds spring suspension, the drive mode and the sense mode are mechanically decoupled. Through careful layout design of the location of the dual-folds spring suspension and the drive combs, the mechanical coupling effect is further decreased by isolating the unwanted excitation from detection. The peripheral circuit is also the important part to realize the function of the gyro system. Since the analog circuit has some inherent shortcomings, which has limited the accuracy of the gyro. In this paper, a digital control system for micro-comb is introduced.
The Design of the Detonator Wick Resistance Auto-Stripping Detector
Authors: Yang Ming Xin , Wang Nan , Song Wei
Published: November 2011

This paper introduces an online auto-monitoring instrument which can automatically slice the external insulation cover of the leading wire and accurately measure the wick resistance in the assembly line of the detonator wick resistance. With safety protection circuit, constant current source is employed to measure the resistance, endowing the design with high accuracy, safety protection features and high degree of automation. It is expected to change the traditional production process where manual work has been used to measure and collect statistics, hence could greatly improve labor productivity as well as product quality and produce favorable application and promotion value.
Application of Thyristor AC Voltage Regulation Technology in ICP Spectrum Excitation Source
Authors: Zhou Ying Chang , Jia Rui Jun , Sun Rong Xia , Huang Pan Pan , Wang Yong Qing
Published: November 2011

SCM control technology be applied to inductively coupled plasma excitation source in this paper. Through controlling thyristor trigger angle control AC voltage regulation, the go through step-up circuit to achieve output power continuously adjustable. It introduces construction and work principle. Grating spectrograph is co-operated with thyristor AC voltage ICP excitation source for performance tested. By means of Ar355.431nm tested power stability≤0.5%. Testing Fe, Cu, Au and other elements shows that the detection limit is 10-9g/ml, precision relative standard deviation RSD≤ 3％. Results show that this voltage regulation technology is stable, reduces the instrument’s size and operates conveniently. It is suitable for ICP excitation source in spectroscopic analysis.