bluuebunny/crossref_metadata_2025 huggingface dataset:
Automatic Calibration of the 3D Vector Magnetometer
Authors: Li Long , He Zhang
Published: November 2012

Embedded sensors are an emerging trend in mobile consumer devices. In this work a new algorithm is derived for the onboard calibration of three-axis magnetometers. The proposed calibration method is written in the sensor frame, and compensates for the combined effect of all linear time-invariant distortions, namely soft iron, hard iron, three-dimensional sensor non-orthogonally, scale factors, null-shift, arbitrary bias, among others. The new algorithm can be separated into two steps: In the first step, obtain the ellipsoid fitting parameters from comparing the difference between the measured value and the actual vector. In a second step, a calibration algorithm is adopted to compensate for magnetometers distortions. According to the model parameters the measured data is corrected to improve the precision of magnetometer. Simulation and experimental results with sensors data are presented and discussed, supporting the application of the algorithm to commercial and military platforms.
Design and Optimization of Elastic Diaphragm in Miniature High-Temperature Pressure Sensor
Authors: Cao Ling
Published: November 2012

The differential stress distribution of rectangular diaphragm with different sizes is simulated and analyzed using ANSYS. The results show that the maximal differential stress region on the rectangular diaphragm is located at the diaphragm center and the long side center, and also it gradually increases as the length-width ratio decrease. When the ratio is less than 1:2.2, the increase degree is not obvious and even falls slightly. According to this, the length-width ratio of the rectangular strain diaphragm was optimized as 1:2.2. Furthermore, the influence of stain diaphragm with different thicknesses and temperatures in differential stress distribution is discussed. It proves that the differential stress of the diaphragm is less affected by temperature, when the diaphragm thickness is properly chosen. The present results will provide the prerequisite for the design of miniature high-temperature pressure sensor in the future.
Propulsion-Force Optimized Control of Linear Induction Motor for Urban Transportation System Considering Material Change of Reaction Plate
Authors: Li Meng , Yang Zhong Ping
Published: November 2012

In this paper, a method of calculating the parameters of equivalent circuit model of linear induction motor(LIM) is proposed based on numerical analysis and finite element method(FEM). The method is proved accurately through the traditional removed and locked method. Material change of reaction plate’s effect on how equivalent circuit’s parameters change and the influence on control characteristics are analyzed through this method. A control algorithm to compensate the effect of material change is presented. The compensation is based on equivalent circuit parameters variation and indirect vector control. Simulation results have shown the algorithm had good performances
A Camera Calibration Method Using Quadratic Curve Fitting
Authors: Xia Tian , Jin Chao , Jiang Xiao Yang , Li Yi Zhong
Published: November 2012

The camera calibration is an essential part in the machine vision,the camera calibration is to establish the relationship between the camera image pixellocation and scene position,the approach is based on the camera model,solving the model parameters of the camera image coordinates and world coordinates from the known feature points. Using the camera calibration method based on quadratic curve,this article selects a template consists of two concentric circles and two concentric ovals.We shot 4 images in different directions,and use different combinations of three of the four images to calibrate camera.Thus we can calculatethe various parameters of the camera.
The Research of Automobile Automatic Stabilizer Bar Control System and Test Platform
Authors: Zhao Han , Sun Hao , Feng Yong Kai , Zhang Wei Xia
Published: November 2012

In connection with the problems that the automobile passive stabilizer bar can’t reflect the road conditions in real time and it is difficult to simultaneously meet the requirements of ride comfort and manipulation stability, this paper describes a kind of control system and test platform of the automobile automatic stabilizer bar. The control system uses speed sensor, steering angle sensor, roll angle sensor, lateral acceleration sensor and displacement sensor to simulate a variety of vehicle’s real driving conditions in the laboratory environment. According to the formulated control strategy, the microcontroller will send different instructions to make the executive mechanism act reasonably and in time. Then the test platform is established in the laboratory environment by the method of semi-physical simulation. The system can be designed according to the different needs of the vehicle and ensures the vehicle’s safety and comfort to the maximum.
Design and Implementation of Control System in Ultrasonic Detection Machine for Plate Part
Authors: Zhang Xin Ju , Yue Yan Fang
Published: November 2012

It is provided that when a machine has some thin-walled monolithic structure parts, It can improve equipment stiffness, reduce the weight of the equipment, greatly reducing equipment parts number. But, the casting property of the thin-walled monolithic structure parts are very bad, at the same time, those parts may have a warp in machining processes. So, to a thin-walled monolithic structure part of an important machine, nondestructive inspection should be carried out before assembly. The machine typically was designed to detect if a plate part has some imperfections. The machine includes control system built with SIEMENS CPU224 programmable logic controller (PLC), hydraulic driving system and the ultrasonic detection, etc. The prototype built can detect a key part before assembled, which is used in military, high pressure vessel and huge bridge.
A Design of Intelligent Illumination System Based on LonWorks
Authors: Zhang Ying , Yang Pu Qiong , Zheng Xue Fei , Tang Yong Hui
Published: November 2012

Fieldbus technology was one of the hottest development of today’s control area, It promoted fast development of modern enterprise network technology, brought new vitality and effectiveness to enterprises, therefore it had been widely used. The characteristics of Lons fieldbus technology were briefly introduced. The application of LonWorks technology in the field of intelligent illumination system was studied. The whole scheme of the intelligent illumination system and the hardware circuit for Lonworks intelligent node were designed and described in details. NodeBuilder software which was developed by Echelone company was used to design language for the LonWorks intelligent node. Through the LonWorks network communication, realized the functions of data transmission, memory and real-time monitoring, fast diagnosis and so on, it was an intelligent and highly effective system in automatic monitor. This intelligent illumination system achieved many functions, such as illumination auto adjusting, body detecting and remote monitoring. The system had better real-time performance and validity.
Energy-Saving Applying Study of Fuzzy Control in the Variable Frequency and Constant Pressure Water Supply System
Authors: Hu Yao Bin , Wang Yu Lin , Hu Liang Bin , Wei Peng
Published: November 2012

A new energy-saving method of variable frequency and constant pressure water supply system based on fuzzy control theory and software control technique is presented in this paper. Firstly, collecting the pipe network pressure periodically through the pressure sensor, the differential pressure signal will be sent into fuzzy controller after comparing the pipe network pressure with the set pressure. Then send a precise control quantity into the PID regulator to control output frequency of the frequency converter after a series of fuzzy arithmetic and solution of fuzzy arithmetic, so as to achieve the purpose of pump speed and consumed power controlling. The operating principle of variable frequency and constant pressure water supply system and the design procedures of software programming are elaborated. Practical application shows that the variable frequency and constant pressure water supply system based on fuzzy control has good effect on energy saving and obvious economic benefits and is worth popularizing and applying.
Power Short-Term Load Forecasting Based on QPSO-SVM
Authors: Zhu Xing Tong , Xu Bo
Published: November 2012

The values of parameters of support vector machine have close contact with its forecast accuracy. In order to accurately forecast power short-term load,we presented a power short-term load forecasting method based on quantum-behaved particle swarm optimization and support vector machine.First,cauchy distribution was used to improve the quantum particle swarm algorithm.Secondly,the improved quantum particle swarm optimization algorithm was used to optimize the parameter of support vector machine.Finally, the support vector machine was used for power short-term load forecasting. In the proposed method such factors impacting loads as meteorology,weather and date types are comprehensively considered. The experimental results show that the root-mean-square relative error of the proposed method is only 1.90%, which is less than those of SVM and PSO-SVM model by 2.29% and 2.80%, respectively.
Control and Stability Analysis of Multi-Joint Manipulator under Constraints Based on Riemannian Geometry
Authors: Liu Hao , Sun Hua Fei , Ding Gui Yan , Zhang Teng , Yuan Lei
Published: November 2012

This paper investigates the optimal control of multi-joint manipulator from the view of Riemannian geometry. We construct Riemannian manifold equipped with kinetic energy metric about configuration space, and regard constraints work space as submersion submanifold. We define the covariant forms for velocity and acceleration on Riemannian manifold, which make all expressions be independent of the choice of the coordinate systems, and research the relationship between the Euler equation and the geodesic equation, and show the property of preserving energy along geodesic paths. We investigate the hybrid position and force control under constraints, and analyze the corresponding stability based on Lyapunov’s method.
Multidisciplinary Design Optimization for an Earth Observation Satellite
Authors: Wang Xiao Hui , Xu Yan , Xia Ren Wei
Published: November 2012

This paper presents the multidisciplinary design optimization (MDO) for an earth observation satellite. The aim of the paper is to use various multidisciplinary optimization methods to optimize the numerical models of an earth observation satellite under iSIGHTTM software environment. Based on the best earth observation criteria, a mathematical model of the earth observation satellite is proposed, which considers the design variables, the state variables and constraints of the payload system, the attitude system, the control system, the power system, the structure system, and the propulsion system. This paper conducts the optimization by using the above three methods, and compare the efficiency and applicability among the methods.
Study on Improved PCA-SVM Model for Water Demand Prediction
Authors: Xue Xiang Hong , Xue Xiao Feng , Xu Lei
Published: November 2012

construct an improved water demand prediction model for support vector machine (SVM) on the basis of principle components analysis (PCA) in order to improve the accuracy of water demand prediction and prediction efficiency. Analyze the principal components of all the index factors which affect water demand; eliminate redundant information between the indices, thus to reduce SVM input dimensions; besides, it also introduces genetic algorithm, solved the problem that the traditional SUV parameters cannot optimized dynamically. A simulated experiment proves that the predication accuracy of this model is higher than SVM, BP neural network; this model has higher generalization ability and is an effective model for predicting water demand.
Research on In-Vehicle FlexRay Bus Network Nodes
Authors: Ou Zhou , Xie Xiao Peng
Published: November 2012

Network node designs of hardware system and software system based on in-vehicle FlexRay Bus were put forward. Structure and theory of node’s MCU, communication controller and Bus drive were analyzed. The simplest system of FlexRay Bus node was structured, and main files program, clock program, interruption program, and FlexRay Bus communication program were configured. The operation status of FlexRay Bus protocol was analyzed, and programs of receiving and transmitting data were designed. The experimental system based on MC9S12XF512 was established, and in development environment of CodeWarrior IDE, FlexRay Bus networks nodes communication was accomplished based on TDMA and FTDMA mechanism.
A New Numerical Control System Based on ARM Microprocessor
Authors: Zhang Jia Ying
Published: November 2012

In this paper, a new numerical control system for machining tool is introduced. The system hardware’s basis is ARM9 microprocessor. It can control four step-servo motors or servo-actuators and realize any three motors motion simultaneously. The system is a multifunction. To realize this, the software is important. The system’s software analyzes the keyboard response, translates the CNC code, receive the CNC code from other computer or keyboard. It gives the interpolation values made the system realize circle or straight line movement. In the management of software, the system can realize multifunction tasks
The Trouble-Shooting for the Over-Current in AC Inverter of Tanker
Authors: Li Fang Yuan
Published: November 2012

During the drive speed operation with motor, due to the big difference between the synchronous speed and the motor speed, it likely causes too much current. When the current exceeds a certain limit, it will cause the drive to current protection of the acceleration. For the over-current drive in the tanker case, by analyzing the causes of over-current proceeding, the key points are described from the load check, the drive hardware check, the parameters check, input/output circuit inspection and so on. When the large start torque or acceleration torque is necessary, the motor torque of about 100 to 150% can be generated in the low frequency area by adjusting the torque boost.
Switching Control Methods for Expressway Ramp Metering Based on Hybrid Automaton Model
Authors: Li Hong Feng , Wang Xi Fu , Ding Qing Yan
Published: November 2012

Based on the analyses of the traffic characteristic of urban expressway ramps metering, a hybrid automaton model for expressway ramp metering is set up and switching control methods of hybrid system is proposed using the hybrid automata theory. Compared with fixed-time ramp metering, Alinea control algorithm and fuzzy control algorithm in different traffic flows, and simulated in the Paramics traffic software, the results show that the method of switching control based on hybrid automata theory is more effective than a single control algorithm.
The AGV Controller System Design Based on CPAC
Authors: Xia Tian , Jin Chao , Li Yi Zhong , Jiang Xiao Yang
Published: November 2012

According to the material handling AGV in accurate,timely and flexible requirements, proposed based on Googol GE-400SV motion controller AGV control system. Constructed to CPAC core AGV control system hardware structure. Constructed as GE-400SV motion controller for the core of AGV control system hardware structure, and using VC ++6.0 completed system software realization. Experimental results show that: use GE-400SV motion controller and the development software as control core of AGV can meet the hardware and software design of Automated Guided Vehicle precise positionig , automatic walk.
Non-Sinusoidal Injection Control Strategy of Z-Source Inverter
Authors: Zhou Yang , Ma Xiao
Published: November 2012

The modulation strategy of injecting non-sinusoidal into reference voltage is presented in this paper. Z-source inductor current ripple and the relationship of voltage gain versus modulation index are analyzed in detail. Compared to simple boost control, the non-sinusoidal injection modulation strategy can obviously decreased the switching times, thus switching loss is cut down, and the voltage stress and Z-source inductor current ripple are obviously reduced. Theoretical analysis, simulation and experimental results are presented to demonstrate the features of the control.
Walking Motion Generation and Validation of Biped Humanoid Robot
Authors: Tu Bo , Zhao Dan Pu , Tai Xian Qing
Published: November 2012

Walking motion generation and validation have been a significant issue for biped humanoid robot. To generate more natural walking motions, and confirm the validity rapidly, this paper presents work on walking motion planning and validity verifying. Based on spline interpolation method, the walking motions in both sagittal and lateral planes are generated. Dynamic model is constructed with the toolbox of SimMechanics for Matlab, and the interactive forces between robot’s sole and ground are constrained in order to depict the state of balance. Dynamic model is driven by the walking motions which have been generated. The simulation and analysis demonstrate the validity of the motion which has been designed.
Study on 3-D Laser-Scanning-Based Machine Vision System for Robotic Construction Vehicles
Authors: Cao Jin Ling , Luo Ying , Li Zhi
Published: November 2012

Based on the AR4000-LIR type infrared laser rangefinder, the prototype of the 3-D laser-scanning-based machine vision system for robotic construction vehicles is developed and the software for scanning control, swing control and data sampling/processing is programmed. The experimental results show that the system has good spatial resolution and stability and is able to be used for the task planning of the robotic construction vehicles which is in autonomous operation, and better able to scan the detail object contour.
Photon Counter Implemented by Field Programmable Gate Array
Authors: Li Xu , Qi Xing Guang , Li Qing Hua , Wang Ning , Wang Li Peng
Published: November 2012

Photon correlation technique is an effective method for measuring the particle size of sub-micron particles and nanoparticles. This tenchnology has a good prospect and commerical value. Photon counter is used in photon correlation spectroscopy experiment to gain the intensity of photon. In order to obtain the accurate values of the photon correlation, efficient and accurate photon counter must be designed. This paper presents two kinds of photon counters implemented by FPGA. The programming language used is Verilog HDL. The software design and system simulation are completed in the integration circumstance of ISE. Experiments show that our work is effective. They all have a simple circuit design, and easy to be upgraded. The accurate photon counters can meet the different requirements of photon correlation.
Design of the Quad-Redundant Generators Based on CAN-Bus and Nonlinear PID
Authors: Zhou Yong , Zhang Yu Feng , Zhou Qi Xun
Published: November 2012

A novel control system of Quad-Redundant generators with the CAN-bus communication network and nonlinear PID algorithm is designed in this paper. To enhance the reliability of this power generating units, a control strategy for the multi-DSC control network of four Brushless DC Motors is presented. The hardware platform of this structure is composed of host-computer, master controller and slave-controllers, on this platform every generator could be driven independently via the CAN-bus communication network. And the principle of the nonlinear PID parameters is proposed. Using this system, the control structure of generators could be simplified and the speed of communicating could be improved. At the end of this paper, the experiment results verified that the control system is reliable, the control strategy is rational, and the system has better dynamic response.
Design and Research of Energy Saving Control System for Heating Network
Authors: Sun Hong Xing , Gao Chuang , Yan Xin
Published: November 2012

In the central heating system, because the controlled object has the characteristics of time-varying, nonlinear, strong coupling and big lag. The traditional single loop model and the conventional PID control algorithm are difficult to react the mechanism and meet the control requirements. Therefore a model of multiplex heating network is established. By comparing the single neuron PID control algorithm with the traditional PID control algorithm, the results show that the single neuron PID control algorithm has a better control effect.
Implementation of a Voice Dialing System Based on HTK
Authors: Li Fen Lan , Ma Xiao Yue , Zhuang Zhe Min
Published: November 2012

Putting speech recognition technology into practice, a speaker-independent digital voice dialing system is realized in an embedded system. In the speech recognition process, the Mel Frequency Cepstrum Coefficients (MFCC) is used as the feature parameter, the Continuous Hidden Markov Model (CHMM) is chosen as the training and recognition model and realized by HTK. This speaker-independent digit recognition is tested on embedded system. The result indicates the accuracy of this system reaches up to 98% to speaker-independent case and it takes 3.55 seconds. The speech recognition is implemented in software, which is easier transplant to different platform and has potential application prospects.
Analog Circuit Fault Diagnosis Using AdaBoost with SVM-Based Component Classiﬁers
Authors: Dong Bao Yu , Ren Guang
Published: November 2012

This paper presents a novel method of analog circuit fault diagnosis using AdaBoost with SVM-based component classiﬁers. We use binary-SVMs of o-a-r SVM as weak classifiers and design appropriate structure of SVM ensemble. Tent map is used to adjust parameters of SVM component classifiers for maintaining the diversity of weak classifiers. In simulation experiment, we use Monte-carlo analysis for 40kHz Sallen-Key bandpass ﬁlter and get transient response of thirteen faults. We extract feature vector by db3 wavelet packet transform and principal component analysis (PCA), and diagnose circuit faults by different methods. Simulation results show that the proposed method has the higher classification accuracy compared with other SVM methods. The generalization performance of ensemble method is good. It is suitable for practical use
A Design of Path Planning System for UP6 Industrial Robot Based on Machine Vision
Authors: Xu Shun Qing
Published: November 2012

This paper introduces operational path planning system of visual industrial robot, which could be applied to arc welding, cutting and gluing. It depicts a calibration method of camera coordinate. It gains environmental messages via the method of image acquisition. It uses the method of image procession to process the signals acquired. It fulfills robotic real-time control and offline programming. Practice has proved that this system has high repeatability precision, which can meet the challenge of arc welding, cutting and gluing, and also meet the needs of production line.
Analysis for SCR Control System Based on ANN
Authors: Ruan Guan Qiang , Zhang Zheng Dong , Wang Qiang
Published: November 2012

Design principle of SCR control system for modern diesel engine is based on MAP which is obtained from experiments. The data of urea injection is obtained from MAP, the many experiments with different revolutions and loads are necessary. MAP from experiments is not accurate, cannot be used for all the range exactly in case of engine running conditions. Therefore, it is very difficult to design PID controller based on MAP. Moreover, the robust performance can not be achieved. To overcome these problems, the control scheme based on artificial neural network (ANN) is proposed. This controller has good robust performance and rapid adjustment. From experiments, the system using this controller can achieve good performance.
Pseudo Multi-Hop Distributed Consensus with Adaptive Quantization
Authors: Wang Wen Kai , Peng Huan Xin
Published: November 2012

The convergence accuracy of distributed consensus with quantization communication depends on the quantization error and the convergence rate of the distributed consensus algorithm. In order to improve the accuracy and the convergence rate of distributed consensus under quantized communication, in the paper, based on the adaptively quantized scheme, we propose the pseudo multi-hop adaptively quantized distributed consensus algorithm. We analyze the convergence performance of the pseudo multi-hop adaptively quantized distributed consensus algorithm, and the algorithm can achieves a consensus in a mean square sense. Simultaneously, Simulations are present. Results show that the pseudo multi-hop adaptively quantized distributed consensus algorithm can reach an average consensus, and its convergence rate is higher than those of the other adaptive quantized distributed consensus algorithms.
The Design and Simulation of Voltage and Reactive Power Fuzzy Controller in Substation
Authors: Fang Huan Huan , Shu Xin Mei , Wang Jun , Wang Ming Qin
Published: November 2012

This paper analyzes the existing problems of the present substation of substation voltage and reactive power integrated control. A design for substation’s voltage and reactive power integrated control based on fuzzy 17-area control method is proposed. We build a substation simulation model base on voltage and reactive power fuzzy integrated controller. In this way, we analyze and simulate this control system dynamic performance. The simulation results show that this kind of control idea is feasible and it can effectively improve the voltage qualification rate, reduce frequency of the adjusted taps of transformer and switch action of the capacitor. It has a good control effect.
Stochastic Admissibility for a Class of Nonlinear Singular Markovian Jump Systems with Time-Delay
Authors: Long Shao Hua , Zhong Shou Ming
Published: November 2012

This paper is concerned with the problem of the stochastic admissibility for a class of nonlinear singular Markovian jump systems with time-delay by employing the free-weighting matrix method and the Lyapunov functional method. The singular matrices Er(t) in the discussed system are mode-dependent. A sufficient condition is presented to guarantee the considered system to be stochastically admissible. The proposed result is formulated in terms of linear matrix inequalities(LMIs). A numerical example is provided to verify the effectiveness of the obtained method.
Application of Fourier Analysis to the Outline of Object
Authors: Hu Jiang Ping
Published: November 2012

Precise measurement of shape parameters of gear components is of ultimate importance for performance and service life of machinery. The conventional manual methods with aid of measurement tools rely largely on experiences of testing personnel. This study aims at developing an efficient and automatic methods for gear measurements, based on Fourier analysis with image processing software OPTIMAS. The shape parameters of gear are conveniently derived from the polar coordinates and the Fourier coefficients obtained from the image analysis software. The automatic methods are applied to two types of gear for illustration. The macro written for this purpose is presented and the measurement results are compared with conventional methods. It has been proven that Fourier analysis is a reliable and cost effective method for gear measurement. In addition, the results of Fourier analysis can be used to determine other parameters to characterize shape and size of the gear.
A Sensor of Aero-Engine Real-Time Fault Detection System Based on ARM9
Authors: Sun Yi Gang , Wang Lei , Chen Wei Xing
Published: November 2012

A system is designed to monitor fault of sensors for aircraft engine real-time. SCM C8051F120 is used to control sensor signal acquisition process, and after processing and storage, the data will be transferred to the data processing unit via Ethernet for analysis and detection. ARM9 embedded computer based on WinCE is used as a data processing core for the data processing unit, three layers BP neural network is used as a sensor fault detection algorithm and troubleshooting software with C++ is developed. It can handle large amounts of data and improve processing efficiency. It has a good interface as well. Compared with current systems, it has been greatly improved in real-time and accuracy. After verification, the system is accurate and strong real-time, and can monitor aircraft engine sensor faults correctly.
Multi-Sensor Cooperative Tracking Using Distributed Nash Q-Learning
Authors: Cai Jia , Huang Chang Qiang , Guo Hai Feng
Published: November 2012

Traditional target tracking algorithm has a disadvantage of excessive dependence on the environment model. Thus a multi-sensor cooperative tracking method using distributed Nash Q-learning was proposed. Distributed Nash Q-learning with model-free was firstly described. Then sensor action and reward function were defined, which both are very crucial to the learning. Sensor action was only subjected to angle control, and reward function was given by calculating the trace of one time-step prediction error covariance. Nash tragedy can not be directly calculated, therefore, a probability statistics method using Bayesian inference was used to update the Q function. Simulation of passive tracking merely with angle measurements shows that this algorithm can enhance the adaptation to environment change and the tracking accuracy.
A Study on Using Plasticity Theory in the Design of the Transit Platform’s Panel
Authors: Teng Yuan Yuan , Dong Da Shan , Qiu Hui Qing
Published: November 2012

Taking the limit intensity as a starting point, a plasticity design theory is introduced in the design of the transit platform’s panel of double trolley quayside container crane for replacing elasticity design theory as a conventional method. As to the impact dynamics issue, the study gives a theoretical derivation based on the energy law as well as a verification of the experiments of the lockpins’ falling , and uses simulations with Ansys/Ls-dyna condition. Combining the above three aspects, the results prove to be correct. Given the limitations and requirements of the practical situation and the standards, a reasonable design is offered. Through full consideration, it provides the value of the experience for future reference design and should be widely extended to use.
Backstepping Adaptive Fuzzy Control for Permanent Magnet Synchronous Motor Servo Systems
Authors: Du Ren Hui , Wu Yi Fei , Chen Wei , Chen Qing Wei
Published: November 2012

An adaptive fuzzy controller based on the backstepping method is developed for permanent magnet synchronous motor (PMSM) servo systems with unknown parameters, nonlinear friction and other load torque disturbances. The adaptive fuzzy logic system is used to approximate the nonlinear part of the system online, which can eliminate the influence of uncertainties and nonlinear factors effectively and realize the high-precision position tracking. By adopting the Lyapunov method, it is proved that the position tracking error converges exponentially. Compared with the traditional backstepping adaptive control (BAC), the simulation results show that the backstepping adaptive fuzzy control (BAFC) has better robustness and accuracy.
Study on Multivariable System Based on PID Neural Network Control
Authors: Shu Huai Lin , Hu Jin Tian
Published: November 2012

The multivariable PID neural network (MPIDNN) control system is introduced in this paper. MPIDNN is used to perform both the control and the decouple at the same time and to get better performance. It is difficult to control multivariable system by conventional controller because the strong coupling properties of the system. Generally, the decoupling system should be designed first and the multivariable object would be divided into several single variable objects. Then, several simple controller would achieve the control of those objects. The decoupling system and the controller exist in theory but the design process is very difficult actually because the transfer function of the object is difficult to get. Especially, if the number of the object inputs is not equal to that of the object outputs, which is called unsymmetry object, the conventional decoupling is impossible. A actual example is discussed in the paper in order to prove the function of the MPIDNN, in which an un-symmetry multivariable system which has 3 inputs and 2 outputs is controlled by a MPIDNN and the perfect control property is obtained by self-learning process.
Robust Stabilization of Stochastic Singular Systems with Markovian Switching
Authors: Ding Yu Cai , Zhu Hong , Zhang Yu Ping , Zeng Yong
Published: November 2012

In this paper, robust stability and stabilization of singular stochastic hybrid systems are investigated. The system under consideration involves parameter uncertainties, Itô-type stochastic disturbance, Markovian jump parameters as well as time-varying delays. The aim of this paper is to design a state controller such that the dynamic system is robust stable. By using the Lyapunov-Krasovskii functional and Itô's differential rule, delay-range-dependent sufficient conditions on robust stability and stabilization are obtained in the form of linear matrix inequalities (LMIs). A numerical example is given to illustrate the effectiveness of the proposed main results.
Research on Multi-Objective Optimization Design of Thrust Vector Control Actuator
Authors: Zhou Jun , Zhang Jiao Long , Zhou Feng Qi
Published: November 2012

Aiming at the seriously nonlinear problems of the single nozzle thrust vector control servo system, this paper detailedly deduced the functional relations between the layout of actuators and system dynamic parameters, on the basis of which, a multi-objective optimization model was established with coupling degree, angular asymmetry, as well as length and variation degree of initial swinging arm taken into consideration. Linear weighting method was adopted to convert the multi-objective function into a uni-objective one and an improved genetic algorithm with good robustness was utilized to solve the optimization problem. Calculation results demonstrated that, with this optimization algorithm, sub-objective functions all reach the ideal effects when uni-objective function achieves optimum. The optimization method guarantees that coupling degree, angular asymmetry and swinging arm variation achieve minimum when the initial swinging arm length is at its maximum, which provides theoretical basis for the actuator layout of thrust vector control.
Consensus of Singular Multi-Agent Systems with Continuous-Time Dynamics
Authors: Jiang Tong Qiang , He Jia Wei , Gao Yan Ping
Published: November 2012

Consensus of singular multi-agent systems is studied, where the dynamics of each agent is described by a continuous-time singular system. Based on the controllability theory of singular systems, the consensus problem under consideration is transformed into the stability problem of a low-order normal system. Moreover, a sufficient and necessary condition for consensus is obtained by applying the stability theory. Finally, simulation examples are provided to validate the theoretical results.
Research on the Wi-Fi Protocol Intelligent Automatic Meter Reading System
Authors: Huang He Song , Yu Chuan Wei , Wang Zhen Lin , Wang Ning
Published: November 2012

In view of the real-time, reliable and efficient requirements in data transmission of the automatic meter reading system, a remote automatic meter reading scheme based on the technology of Wi-Fi is proposed. Wi-Fi (sometimes spelled Wifi or WiFi) is a popular technology that allows an electronic device to exchange data wirelessly (using radio waves) over a computer network, including high-speed Internet connections. Based on the transmission technology of Wi-Fi, this article introduces a remote automatic meter reading system, which takes UART-WiFi module as core and allows the meter connected to the Internet, so as to realize the function of network remote automatic meter reading.
Design of the Controller for PCMC Forward Converters
Authors: Zhang Wen , Xue Jia Xiang , Jiang Hong Bo
Published: November 2012

The work characteristics of forward converters are described. Presented the theoretical and practical details by means of the state space averaging method, the small signal model of forward converters under peak current mode controlled is constructed. The design of the controller is given to be used in this converter with the maximum control bandwidth of 10 kHz as well as an adequate phase margin. A closed loop simulink model for the converter is constructed on Matlab and the stability and dynamical performance demonstrated. The theoretical predictions of this paper are supported by computer simulations graphically represented and analyzed as practical evidences. Simulation results show the feasibility of the design, thus providing a solution seamless implemented the applications of peak current mode controlled forward converters.
Study on Comprehensive Performance Testing Table and Intelligent Measuring Technology of Constant Velocity Universal Joint Assembly
Authors: Shi Lun , Qin Xu Qi , Liu Xiao Jun
Published: November 2012

A comprehensive performance testing table, on which 9 testing items can be done, of the constant velocity joint drive shaft assembly is developed. The principle of the system is introduced and the mechanical structure and the computer measuring and control system of it are discussed particularly. Some intelligent measuring methods, such as fuzzy method, are used in the system and an example of testing the slip curve characteristic of the joint assembly by fuzzy measuring method is presented in detail, including its membership function and fuzzy rules of fuzzy reasoning. The slip curve measured by traditional method compared with that by fuzzy method. The experimental results show that the measurement precision by fuzzy method is more accurate than that by the traditional one.
Stabilization Analysis of Switched Affine System Applied to Dc-Dc Converters
Authors: Zhang Fang Ying , Hu Wei
Published: November 2012

This paper aims to solve the problem of stabilization about a switched affine system with stable and unstable subsystems. We show that if the switching signal satisfies the so called average dwell time approach, the uniform stabilization of the switched affine system under specific switching signal is guaranteed with explicit bound, and the switched autonomous system is a special case which is asymptotically stabilization. Then, we applied this result to Dc-Dc converters; the results verify that the peak-current control boost is uniform stabilization. Simulate results verify the theoretical analysis. The proposed Theoretical analytical methods can apply to other Dc-Dc converters under specific switching signals.
Pre-Estimating Dynamically the Optimum of Extremum Value Control System with Large Time Delay Element Based on Correlation Identification
Authors: Li Guo Qiang , Liu Yong Qin , Liu Wen Jiang
Published: November 2012

As to the optimum of extremum value controlled plant, if the transfer function of its linear part is only with the high order dynamic elements, the optimum of extremum value control system could be dynamically pre-estimated by using the method based on correlation identification we presented, the pre-estimating method has the estimate speed quickly, anti-jamming ability strong, accurate, highly effective and so on the merits. However, if the controlled plant is simultaneously with high order dynamic elements and a large time delay element, the method could not be used directly to pre-estimate dynamically the optimum of the extremum value control system. A new improved pre-estimating method is presented so as to resolve the problem above. After we have in detail analyzed the derivation process of the pre-estimating method we presented, Fully taking into account the effects of large time-delay element, a number of conditions have been improved, the algorithm based on correlation identification has been extended, the optimum of extremum value control system with a large time delay element is well resolved by the extended algorithm.
Optimal Control of a Nuclear Reactor in Load Follow Based on LQG/LTR
Authors: Liu Hua Chu
Published: November 2012

Load follow is necessary in the operation of a power plant due to the need of power changing with time. In the load following of a nuclear plant, many special factors have to be considered, which makes the control strategy particularly difficult as well as important. Among many strategies, Linear Quadratic Gaussian and Loop Transfer Recovery (LQG/LTR) design approach is an efficient method for L-F, and is applied to a model of a practical nuclear reactor. The simulation shows the robust control method LQG/LTR meet the control requirements of the neutron flux spatial distribution during load following. And a Kalman-filter based feedback control is also applied in this approach to eliminate the oscillations caused by Xenon poisoning within the nuclear reactor.
Design on Parameters of Power Circuit of AC Servo System
Authors: Liu Bing You
Published: November 2012

Power circuit is the core of high precision permanent magnet synchronous motor (PMSM) AC servo system. It is composed of three-phase AC-DC circuit and Intelligence Power Module (IPM). Three-phase AC electric currents flows through the major power circuit and changed to sinusoidal symmetrically AC currents to drive PMSM to work. For the high precision PMSM AC servo system, a design method of the system’s power circuit was given and the specific parameters of the circuit were calculated. According to the circuit, system simulation was carried on and simulation results show that the design of power circuit is feasible and the high precision PMSM AC servo system has good performances such as high position and trace accuracy, large range of adjustable speed, fast response and strong robustness. So the power circuit designed not only guarantee system’s robustness but also system’s following performance.
Joint Combat System of Systems Modeling and Effectiveness Analysis Based on Complex Networks
Authors: Qi Yan Bo , Zhong Liu , Zhang Le , Xu Jiang Hu
Published: November 2012

How to describe the difference among various combat networks and measure their effectiveness is an important problem in combat analysis. In this paper three basic network models are developed based on the theory of complex networks and a new method is put forward for measuring the network effect of combat SoS. Numerical comparisons of the three combat network models indicate that though integrated joint operations network has the highest networked effects in networked effectiveness and clustering coefficient, but when considering the Average Path Length index, it has the lowest effectiveness. The results also suggest that the degree distribution of integrated joint operations network is scale-free thus it has the highest survivability.
The Direct Kinematics Solution of the 6-RSPS Simulator Platform with BP Networks
Authors: Li Jian Jun , Wei Yan Ding , Zhou Xiao Jun
Published: November 2012

A new structure of 6-RSPS simulator platform which can be rotated infinitely is presented. The solution of direct kinematics problem of parallel structure is the fundamental problem. For the solution of this problem, according to the links vector diagram, the relationship of the position and orientation of the platform between the length of links and the rotate angle of the under-hinge is derived. BP network is applied, then using the previous data obtained by inverse kinematics as the training data and testing data of BP network, get the direct kinematics solution. Simulation results verified that the solution of direct kinematics applied the BP network can be meet the requirements completely, and the error percentages are within the acceptable range.
The Analysis of Wire Rope Tension Sensor Elastic Body Based on Solidworks
Authors: Liu Peng , Zhang Xin , Huang Ya Kun , Rong Ji Xu
Published: November 2012

This article introduces unbalance phenomenon when several steel wire ropes hoist skip and some main methods of measuring steel wire ropes tension in coal mine. Use the strain effects to design a sensor which can be used to measure the tension of steel wire rope, to provide reliable data for the subsequent online tension inspection system. In order to facilitate the sensor in this system, the height of the sensor needs to be low enough. As one of the most important parts of the strain sensor, the elastic body is also low-height. To solve that problem, first using the SolidWorks software modeling and analysis of elastic body to design the sizes and obtain the best patch position of strain gauge.
Based on the Point Cloud Data of Columnar Structures to Tilt Analysis
Authors: Li Qin Shan , Wang Tie Cheng
Published: November 2012

Based on the problem that tilt and convergence of some cylindrical structures in the building regularly need monitoring after the construction is completed. 3 D laser scan technology was applied and 3 D laser scanner was used to get the point-cloud data of a cylindrical structure which was deformed for external extrusion in the course of construction. The slope of the structure was calculated by the method of calculating the elliptical circle through more adjustment and proved that the method of using the 3 D laser scan technology to monitor the tilt and convergence of some cylindrical structures in the building is feasible and stable. 3 D laser scan technology can be used to calculate the slope of the cylindrical structure with minor error.
Flocking Control under Virtual Leader-Follower with Link Failure
Authors: Wang Wen Kai , Peng Huan Xin
Published: November 2012

For time-delay, noise and network congestion in the communication among agents, there are random communication link failures among agents. In the paper, we analyze the distributed flocking algorithms under virtual leader-follower model with random communication link failures. Under virtual leader-follower model, flocking algorithm can avoid diverging, but the performance of flocking algorithm with link failure often degrades. We analyze the impact brought by link failures on the flocking algorithm when part agents can’t receive the information of the virtual leader, and simulations are done. Results show that the performance of distributed flocking algorithm depends on the probability of link failure. Smaller is the probability of link failures among multi-agents, better is the performance of flocking algorithms with link failure.
Second-Order Consensus Filtering Algorithm
Authors: Peng Huan Xin , Wang Wen Kai
Published: November 2012

In order to improve the accuracy of consensus filters, in this paper, we propose a second-order consensus filtering algorithm based on the pseudo two-hop distributed consensus algorithm, we analyze the performance of the second-order consensus filtering algorithm, and prove that the second-order consensus filtering algorithm is convergent. We analyze the filtering accuracy of the second-order consensus filtering algorithm, and make a comparison for filtering accuracy between the first-order consensus filtering algorithm and the second-order consensus filtering algorithm, simultaneously, simulation is proposed, the results show the second-order consensus filtering algorithm is convergent, and the filtering accuracy is higher than that of the first-order consensus algorithm.