bluuebunny/crossref_metadata_2025 huggingface dataset:
Control System Design of Missiles with High Angle of Attack Based on Differential Geometry and Variable Structure Control Theory
Authors: Gao Yuan
Published: July 2013

This article has proposed a nonlinear decoupling control method based on differential geometry and variable structure control theory according to the nonlinear and strong coupling characteristics of missile with high angle of attack. The affine nonlinear model of missile with high angle of attack was firstly established, the accurate linearization and input/output decoupling of system were then performed by differential homeomorphism and feedback transformations. On the basis of this, the variable structure controller was designed to reduce the influence of parameter variation and disturbance. Simulation results indicate that nonlinear decoupling of missile with high angle of attack can be realized through this control method, which is superior due to its good static and dynamic characteristics.
Analysis of Spontaneous Combustion and Predictive Modeling for Electric Vehicle
Authors: Zhang Jian Xiang , Zhang Jin Zhao
Published: July 2013

Taking pure electric vehicle as object, it has been studied for the temperature and over-current in power system of electric vehicles under different working conditions firstly, the sensor location selected also be analyzed. Based on BP neural network method, the tipping point of spontaneous combustion has been estimated through simulation, and the results show that this approach is effective.
Coal-Conveying Control System for the Pressure of Coal Waste Heat Power Generation Based on PLC
Authors: Zhao Li Jun , Chen Ying Feng
Published: July 2013

This paper constructs a coal-conveying control system based on programmable logic controller (PLC), which is applied to the residual heat and pressure integrated energy-saving technological transformation projects, and realizes the performance of security, reliable and efficient operation. This control system consists of the PLC control system, computer control system and industrial television monitoring system. After more than one year of actual operation shows that the system structure is reasonable, reliable operation, at the same time, reduce labor intensity, improve the utilization rate of equipment, the stable operation also provides a practical reference for other similar projects.
Design of a Secure Electric Vehicle Charging Pile Control Device
Authors: Zhai Feng , Liu Ying , Fu Yi Lun , Cen Wei , Sun Zhi Qiang
Published: July 2013

This paper has designed a secure electric vehicle charging pile control device according to such security problems as the traditional electric vehicle charging pile control devices transmission data can be illegally intercepted easily in electrical communication process. The electric vehicle charging pile control device has used advanced data encryption technology, increased secure storage unit, which can prevent transmission data being intercepted or falsified illegally in electrical communication process effectively, so as to ensure datas integrity and confidentiality. Therefore, it has great practical value.
The Application of Numerical Simulation Technology in Road Engineering
Authors: Hu Ming Wu , Li Luo Ke , Wang Yi Na , Su Hai Tao
Published: July 2013

In order to analyze the contact stresses between dowels and surrounding concrete in the dowel-jointed cement concrete pavement, the 3-D finite element model is used to simulate the stress concentration in concrete around the dowel bars under traffic loading. The stress and strain responses on the concrete surface have been calculated and they are also verified with self-design full-scale experiments. Results show that the strain data from the numerical simulation agrees well with the full-scale experiment. As a result, the research indicates that the 3-D finite element model is an efficient and accurate method to calculate the interaction characteristics between dowel bars and surrounding concrete. Besides, the high press stress concentration on the concrete up dowels and the tensile stress concentration on the concrete besides dowels will cause the initial crack development in the concrete material surrounding the dowels, which is the main reason leading to the dowel bar deterioration. In this paper, a more concrete and detailed numerical analysis method will be provided to analysis the stresses concentration at steel-concrete interface in the concrete structure.
Research on Simulation of Fischer-Tropsch Synthesis Based on Virtual Assembly
Authors: Wang Yan Bang , Su Yue Feng , Zhang Xiao Dong , Deng Wen Sheng
Published: July 2013

The scene graph structure of Fischer-Tropsch synthesis (FTS) was constructed. In the meanwhile, the assembly unit model of equipment was designed. The main FTS reactor and its mathematical physical model were described. Platform for chemical process simulation was established, on base of the virtual assembly for FTS. The method of data transfer in common chemical process simulation was proposed. The composition and flow rate of components, as well as the temperature and pressure of the FTS reactor was investigated by the one dimensional quasi homogeneous model. The relative error is less than 3% between the calculation and experiment. The accuracy of the system process simulation is reliable. It is verified that the simulation method of chemical process is feasible on base of the virtual assembly. This work studies a new way for simulation of the FTS, and also provides technologic supports for the simulation of chemical process based on virtual assembly.
Circuit Realization of Grid Multi-Wing Hyperchaotic System
Authors: Zhang Chao Xia
Published: July 2013

This paper investigates a grid multi-wing hyperchaotic system firstly, then an improved module-based circuits are designed for generating the hyperchaotic attractor. Numerical simulation and circuit implementation have testified the feasibility of the proposed method.
The Coal Slurry Pipeline Pressure Prediction Research Based on Quantum Genetic BP Neural Network
Authors: Yang Xue Cun , Hou Yuan Bin , Kong Ling Hong
Published: July 2013

According to the coal slime pipeline blockage problem of coal gangue thermal power plant, after the analysis of the actual scene, it is sure that thick slurry pump master cylinder pressure prediction is the necessary premise of blockage prediction. The thick slurry pump master cylinder pressure prediction model is proposed, which is based on QGA-BP (Quantum genetic Algorithm BP neural network). The simulation results show that the prediction model based on QGA-BP can be used to predict the paste pump outlet pressure, and the relative error is less than 8%, which can satisfy the engineering requirement .And compared with prediction model based on GA-BP(the genetic Algorithm BP neural network), The QGA-BP prediction model is better than GA-BP model in prediction accuracy and optimization time.
Road Feel Design for Vehicle Steer-by-Wire System Based on Joystick
Authors: Zheng Hong Yu , Han Ya Ning , Zong Chang Fu
Published: July 2013

In order to solve the problem of road feel feedback of vehicle steer-by-wire (SBW) system based on joystick, a road feel control strategy was established to analyze the road feel theory of traditional steer system, which included return, assist and damp control module. By verifying the computer simulation results with the control strategy from software of CarSim and Matlab/Simulink, it shows that the proposed strategy can effective get road feel in different vehicle speed conditions and could improve the vehicle maneuverability to achieve desired steering feel by different drivers.
A Novel Starting Method for Sensorless Brushless DC Motor with Low Cost
Authors: Wang Qiang , Wang You Ren , Kong De Ming , Wu Yong
Published: July 2013

This paper presents a novel method to improve the starting performance for sensorless brushless DC motor (BLDCM) with low cost, based on the principle of back electromotive force (BEMF). The commutation points are extracted from three phase terminal voltages achieved by AD converters integrated in the microprocessor. The phase delay caused by the detection circuit is compensated. The start process consists of alignment, accelerating, and switching. In the accelerating process, the commutation instants are determined by the zero-crossing points and phase delay table. The motor can be started reliably because of the closed-loop startup strategy. Experimental results have verified the effectiveness of the proposed method.
Mechanical Simulation of Knee Movement in Basketball Shooting
Authors: Yue Hui
Published: July 2013

A short explanation of the finite element method as a powerful tool for mathematical modeling is provided, and an application using constitutive modeling of the behavior of ligaments is introduced. Few possible explanations of the role of water in ligament function are extracted from two dimensional finite element models of a classical ligament. The modeling is extended to a three dimensional finite element model for the human anterior cruciate ligament. Simulation of ligament force in pitching motion of basketball player is studied in this paper.
Study on the Control System of Electric Vehicle Anti-Rollover Based on DSP
Authors: Xiong Xin Min , Hou Yan
Published: July 2013

According to the actual need of vehicle anti-rollover, based on the current technology of measuring speed, weighing and measuring turn angle, an anti-rollover control system with differential braking and turn angle limit function for electrical vehicle was researched. The system uses data signal processor (DSP) as the core controller, and includes the speed measuring circuit, the weighing circuit, the steering angle measuring circuit and the steering wheel control circuit. The speed measuring circuit using the orthogonal pulse photoelectric encoder and DSP can realize the acquisition and calculation of speed. The weighing circuit with capacitance sensor can convert the load of vehicle axle to the voltage signal. A/D conversion is completed by DSP, and the vehicle load is calculated with V-M mathematic model. The turn angle measuring circuit is composed of the photoelectric angle sensor, the filter and DSP' counter. The control program of the system was also designed.
Lithium Iron Phosphate Power Battery State of Charge Estimation Based on the Extended Kalman Filter
Authors: Li Ming , Jiang Yang , Zheng Jian Zhong , Peng Xiao Xiao
Published: July 2013

In order to estimate the state of charge (SOC) of lithium iron phosphate (LiFePO4) power battery, the state space model that fit for kalman filter to estimate was established on the basis of PNGV equivalent circuit model. In the case that considering the influence factors such as power battery charge and discharge current, environmental temperature and battery state of health, an improved composite SOC estimation algorithm based on extended kalman filter (EKF) algorithm was proposed, this proposed algorithm integrated using EKF algorithm, improved Ah counting method and open circuit voltage method to estimate SOC. The simulation results show that the proposed algorithm can track the change of the power battery SOC effectively, verify the validity of the proposed algorithm.
Research on the Parameters Identification of Direct Thrust Control System Using Wavelet Neural Network
Authors: Zhao Li Jun
Published: July 2013

Wavelet neural network is used in the direct thrust control system of linear motor in this paper, as wavelet theory has the characteristic of the time frequency location characteristic, the strong approximation and fault-tolerant capability. The observation of flux linkage is improved by accurate identification of primary resistance, and the direct thrust control performance of linear motor is further improved. This paper used wavelet neural network to realize the identification signal of resistance. The simulation results show that the identification system has good effect in primary resistance identification. The direct thrust control system based on resistance identification can efficiently improve the control system performances of linear motor, and offer a novel design opinion for improving the low-speed performances of linear motor.
Research on State of Charge Estimation for Power Battery of Electric Vehicle
Authors: Zong Chang Fu , Xiang Hai Ou , He Lei , Chen Dong Xue
Published: July 2013

An optimized battery state of charge (SOC) estimation method has been proposed in this paper. The method is based on extended Kalman filter (EKF) and combines Ah counting method and open-circuit voltage (OCV) method. According to the current excitation-response of a battery, the internal parameters of the battery model were identified by the method of least squares. Then the proposed estimation method is verified by experiments. The results show that the estimation method can reduce the cumulative error caused by long discharge and it can estimate the battery SOC effectively and accurately.
Study on the Fuzzy Expert System of Cucumber Planting Temperature Humidity Control in Greenhouse
Authors: Cui Wei , Wang Xiang Dong
Published: July 2013

The cucumber is one of the main crop planting in greenhouse,but the production of the cucumber have been restricted by the shortage of the agricultural experts.The design of the fuzzy expert system in this paper.Using computer simulation human experts to control greenhouse cucumber growing environmental temperature,humidity,light intensity.First turn on the sensor detection by the temperature,humidity,light intensity data sent to the computer,then put these data conversion for deviation value and fuzification.Through consulting a large number of documents according to the experience make fuzzy rules.Finally,in the rule base retrieval the fuzzification of data after the corresponding fuzzy rules,and output the executive strategy .
The Algorithm of Fuzzy Adaptive PID Control Applied to the Multi-Channel Temperature Control System of the Injection Molding Machine
Authors: Zhang Yang , Mo Wei
Published: July 2013

This paper presents a fuzzy adaptive PID control algorithm for the multi-channel temperature control system of injection molding machine. The article describes the structure and control rules of fuzzy adaptive PID controller and the hardware and software implementations of the temperature control system. The experimental result shows that the systems temperature control method has a good control effect on such kind of time-varying hysteretic complex temperature control system of injection molding machine, and it can finally reach the temperature control accuracy of ±1°C within the measuring range of 0~400°C.
Speed Model Predictive Control Based on the Track Error Rate
Authors: Huang Jin , Yang Cheng Zhi , Wang Ji Feng
Published: July 2013

In order to make the controlled object have better dynamical characteristics, through introducing the differential item of error into optimal performance index function of tracking error, an improved algorithm of model predictive control is discussed in this paper. The theoretical analysis and Matlab simulation results show that it has better controlled quality and stronger robustness for closed-loop system.
Analysis of Ultrasonic Radiation Field Based on Linear MEMS Ultrasonic Transducer Array
Authors: Wang Hong Liang , Wang Xiang Jun , He Chang De , Xue Chen Yang
Published: July 2013

The analysis of the acoustic field distribution characteristics for the ultrasonic transducer array plays a very important role in both the optimization of the design parameters of the array and the improvement of image quality. In this paper, the acoustic analysis method based on spatial impulse response is studied for the linear MEMS ultrasonic transducer array. The spatial impulse response for the ultrasonic transducer array and the lateral ultrasonic radiation field for the transducer array are obtained by simulation and calculation, and the simulation results are analyzed, which has important implications on the further optimization of MEMS ultrasound transducer design parameters.
Algorithm Design and Convergence Analysis of Iterative Adaptive Dynamic Programming
Authors: Yang Bao Sheng , Yang Bao Sheng , Chen Li Li
Published: July 2013

Time delays are tremendous difficulties to system stability analysis and controller design, and often cause system instability or even lead to the deterioration of the system performance. The optimal control law is solved for a class of nonlinear discrete affine systems with multiple time delays. The systems HJB equation of optimal control is solved by adaptive dynamic iterative algorithm and minimized system performance index function, given the convergence proof of the algorithm. Neural networks are adopted to realize iterative algorithm for optimal control law of time delay systems. The simulation results show that the adaptive dynamic programming can solve for the optimal control of delay nonlinear systems, make the system to achieve stability.
A Digitalized Implementation of Time-of-Flight Measurement for Cable Fault Location
Authors: Yu Jun Hui , Dong Yong Gui
Published: July 2013

The major technical difficulty of time domain reflectometry (TDR) based cable fault location lies in the accurate measurement of the time of flight (TOF). The measurement of such time intervals is realized by a digital counter together with a reference clock. Theoretical analysis is established to prove that the resolution can be refined to nanosecond by averaging the counting results from a massive number of repetitive measurements. A microcontroller is used to generate a repetitive step signal in order to perform the repetitive test. 8 MHz clock and 8-bit digital counter are used to measure the time of flight. Experimental results showed that the timing resolution of the counter method is improved to nanosecond using the mean of 30,000 times of measurement results. A portable prototype for cable fault location is made to verify such a configuration. Test results showed that the position of the cable fault can be located with error of less than 0.1m.
Study on Sugarcane Flow Mathematical Model for Logistics Systems of Mini-Type Sugarcane Harvester in Static State
Authors: Li Li , Zhou Xiao Rong
Published: July 2013

The conveying logistics of harvesting harvesters has been one of the constraints to the sugarcane harvester technology development bottleneck problem,which conveying stability and reliability are not high and easy to plug. Firstly, the mechanism of logistics conveying was discussed. Secondly, for the sugarcane flows (SF) changing in sugarcane harvester process as the objects, the sugarcane volume model and mass of the model in a static state were established, which was relation to the number, the form and the parallel. Finally, the experiments had been done to verify the model coefficients. It had provided the theoretical basis for increasing the sugarcane harvester smooth conveying and work efficiency
Dynamic Characteristics Analysis on Symmetric Control of Asymmetric Heavy-Duty Hydraulic Cylinder
Authors: Pan Liu Ping , Mi Zhi Nan , Ju Shou Jian
Published: July 2013

As an important equipment of electrohydraulic lifting system, heavy-duty cylinder uses asymmetric structure, i.e., non-rod chamber and rod chamber of single-rod piston cylinder. The kind of structure do not ensure equal flow rate between non-rod chamber and rod chamber, leads to different control parameters (including flow gain) on extending and retracting movement of cylinder, and arise asymmetric dynamics. Based on the new definitions of load pressure and load flow, mathematic models of asymmetric hydraulic cylinder on extending and retracting direction are established. Simulation results indicate that the overshoot of extending speed is larger than that of retracting speed, and exists asymmetric features on two moving direction.
Time-Frequency Analysis for Power System Oscillations
Authors: Lu Chia Liang , Huang Pei Hwa
Published: July 2013

Low frequency oscillations due to the lack of damping may occur in power systems under normal operation and will cause system instability. These oscillations are essentially nonlinear power responses which are difficult to extract the inherent characteristics by the time domain method. This paper aims to analyze nonlinear power responses by using the Hilbert-Huang transform (HHT) which is a time-frequency signal processing method which comprises steps of the empirical mode decomposition and the Hilbert transform. Dynamic power system responses, including generator output power and line power are to be processed by the HHT and a set of intrinsic mode functions and the associated Hilbert spectrum are obtained. The generator with most effects on the system will be accordingly found out through the time-frequency analysis and the power system stabilizer will be placed at the generator. Numerical results from a sample power system are demonstrated to show the validity of the time-frequency approach in the study of power system low frequency oscillations.
Effects of Structure Parameters on Performance of DSPM Motor
Authors: Liu Hua , Wang Wei Jun , Mao Long Bo , Dai Qiang
Published: July 2013

A novel flux switching external rotor doubly salient permanent magnet (DSPM) motor was researched. The two-dimensional model of the motor was established by Ansoft motor design software and the effects of air gap length and rotor pole arc on motor performance were discussed. The simulation results show that larger or smaller air gap length and rotor pole arc improve the torque ripple rate, but the increase of air gap length is helpful to enhance the overload capacity. The conclusions of this article have positive significance for improving the motor performance.
Study on Effect of Van Der Waals Force and Casimir Force to Microsystem
Authors: Guan Yan Wei , Gao Shi Qiao , Shen Li , He Yun Li
Published: July 2013

Based on the electrostatic comb drive structure, the comb will do relative motion when it is driven up, and the space between them will be less than 1μm. Considering the micro-scale effect, the Van der Waals force and the Casimir force is used to analyze the influence on the micro-structure, compared with the electrostatic force. The van der Waals force and the Casimir force is almost equivalent to the electrostatic force when the initial gap of the micro-structure and the relative displacement between the micro-structure is relatively small. Therefore the van der Waals force and the Casimir force play an important role in the micro-structure and cannot be ignored.
EMC on Fiber-Optic Transceivers under EFT
Authors: An Guang Pei , Zhang Wei Dong , Cui Xiang , Jiao Chong Qing
Published: July 2013

Under high voltage and ferromagnetic condition, the optical fiber, as the new communication carrier, is widely used in power signal transmission. However, the interference rejection performance of optical-fiber transceiver, an important part of photoelectric conversion, has always been of great concerns. Whether the optical fiber transceiver works properly or not, will directly affect the quality of the whole communication network. This paper focuses on the time-domain and frequency-domain features of power ports and control ports under the strong transient electromagnetic disturbance. At the same time, this paper makes use of magnetic toroid to suppress electromagnetic interference (EMI). The results provide a reference for future anti-jamming design of optical-fiber transceivers.
An Experimental Platform Based on Transfer Learning Paradigm for Mobile Robots
Authors: Lv Hong Bo , Tu Jun Jie , Sun Qi Guo , Li Fang Yuan , Wang Jiao , Lei Yan Xiao
Published: July 2013

The transfer learning paradigm promises to improve the adaptability of mobile robots which apply machine learning (ML) algorithms for perception and localization. An system framework based on transfer learning paradigm for mobile robots was proposed. The keys of the framework are 1) how to arrange the knowledge database, 2) how to select the source data, source model and priori knowledge, 3) the method to achieve the target model and 4) the method to gain new samples. An experimental platform was built up in order to gain data to verify the framework, whose underpan is the same as the Freescale Cup, MCUs core is ARM Cortex-M4, raw data is stored in a SD card and model is trained offline by a more powerful computer using ML algorithms. The MCU communicates with the powerful computer by Zigbee or WiFi. The experimental platform is cheap and feasible, which is validated by data collection and model training experiments.
Error Analyzing Method for Rotation Inertial Navigation System Based on Fourier Transform
Authors: Cheng Jian Hua , Wang Bing Yu , Chen Dai Dai
Published: July 2013

According with the problem that the error propagative characteristics of rotation inertial navigation system can not be quantitatively analyzed, a new error analyzing method is proposed. As the inertial navigation system can be equivalent to a low pass filter, the method converted the complex gyro drifts into signal which can be quantitatively analyzed after modulating through Fourier transform, thus the low frequency components of the error can be extracted. The relationship between navigation errors and gyro drifts is built by using the conventional error equations of strapdown inertial navigation system. The comparative analyses and computer simulation of conventional, uniaxial unidirectional and uniaxial reciprocating system prove the correctness and feasibility of this method. This method provides an effective reference for other same types of control system error analyses.
Research on Roundness Error Measurement and Separation Method of NC Machine Tools
Authors: Xiang Sheng Hua , Lin Hai Feng
Published: July 2013

This paper first introduces the trajectory mode of the each error source in detection the roundness error of NC machine tool. The error separation algorithm is derived according to the relationship between the various error sources and the machine tool motion trajectory. Based on the two testing link under different condition, comparing the test results under two testing conditions, the main error source of NC machine tools is further analyzed. According to the merits and demerits of the two kinds of detection methods, the different round error detection method can be chosen under different occasions.
Vehicle State and Friction Force Estimation Based on FPGA
Authors: Zhao Lin Hui , Liu Zhi Yuan
Published: July 2013

In order to improve the computational performance of the nonlinear observer for vehicle state and friction force estimation, two novel implementation schemes in Verilog Hardware Description Language (HDL) and System on Programmable Chip (SoPC) is proposed based on Field Programmable Gate Array (FPGA). Firstly, the parallelism analysis of the vehicle state and friction force estimation algorithm is provided. Then, the Verilog HDL and SoPC implementation schemes are presented respectively based on the analysis results. Finally, a testing platform is built to evaluate the functionality and the computational performance of the implementation schemes. The experimental results show that the proposed schemes all have high precision and computational efficiency for vehicle state and friction force estimation.
Droplets Transportation on a Piezoelectric Substrate with an Obstacle
Authors: Fu Xiang Ting , Zha Yan , Zhang An Liang
Published: July 2013

A method for a droplet transportation by jumping a obstacle on piezoelectric substrate is presented, and a device for the droplet transportation is implemented on a 128° yx-LiNbO3 piezoelectric substrate. An interdigital transducer and a reflector are fabricated on the piezoelectric substrate using microelectric technology. Hydrophobic film is coated on the area free of electrodes and a polydimethylsilicone obstacle is mounted on it. A radio frequency signal amplified by a power amplifier is applied to the interdigital transducer to generate surface acoustic wave. When the surface acoustic wave meets with the droplet on the piezoelectric substrate during transportation, part of acoustic wave enegy is radiated into the droplet, leading to internal acoustic streaming. Once the radio frequency signal with appropriate amplitude is suddenly decreased, part of the droplet will jump the obstacle due to interial force. Red dye solution drops are demonstrated for transportation experiments. Results show that a droplet can be transported from one side to another of the obstacle on piezoelectric substrate by help of surface acoustic wave. The presented method is helpful for microfluidic system on a piezoelectric substrate.
Study and Design of Home Intelligent System Based on Embedded
Authors: Choi Won Hyuck , Beom Hong Seung , Jie Min Seok
Published: July 2013

Home networking means high tech living environment which connect all the information electric appliances in the house with wire/wireless network and providing various services such as remote education, home automation and multimedia to anyone, anytime and anywhere free from boundaries. This thesis have designed and implemented a controlling system which control intelligent Home networking system with smart phone and server. Implemented intelligent home network system design proposed with home node structure, remote smart application system, and home server controlling system. Home node structure consists of intrusion detection, weather control, power control and On/Off control module and modules design proposed to be controlled from home server.
Development of Automatic Examination Instrument for Diesel Engine Sequential Turbocharging Control System
Authors: Yang Chuan Lei , Liu Jin Zhu , Cao Can , Wang Jin Xin
Published: July 2013

ATmega128 single-chip microcomputer was regarded as control core, the diesel engine speed and pressure signal simulation hardware circuit were designed based on digital to analog converter TLC5618, clock chip DS12C887 and analog signal processing unit SY4-20mA-P. According to the equipment evaluation process, the sequential turbocharging control instrument automatic assessment program was compiled in the reference of real-time. The sequential turbocharging control instrument factory automatic evaluation function was realized which improve the production efficiency.
Design of the Assistive Leg and the Simulation Research
Authors: Liu Zhen Ze , Zhang Lei , Tian Yan Tao
Published: July 2013

The wearable assistive leg is a kind of traditional exoskeleton device, which not only can help healthy people with walking, but also can assist those who have walking troubles to rehabilitate. Based on the bionics principle and the research on the body mechanism, a wearable assistive leg for rehabilitation training and power augmentation is designed. This device satisfies the requirement of the compact structure, portability and safety. Then the dynamic model of the assistive leg is constructed based on the Lagrange theory. The mechanical structure is devised by Solidworks2011 software in which a standard human body model and this assistive leg are assembled. Thus the assembly is introduced into Adams2007 R3. The dynamics simulation is carried in this software. The results and the existing problems are analyzed. The simulation results show that this kind of assistive leg can provide helping force for human lower extremity movements.
A Study of Non-Uniform SPST RF-MEMS Switch under the Effect of Squeeze Film Damping
Authors: Awad Omar A. , El-Sinawi Ameen , Bakri-Kassem Maher , Landolsi Taha
Published: July 2013

This work presents a practical technique that can be used to construct the dynamic model of any RF MEMS switch regardless of its shape. The presented technique also allows for inclusion of squeeze film effect in the model without resorting to complex mathematical development of the latter. The technique utilizes Finite element methods to determine mode shapes and natural frequencies of the switch. A modal-model is then constructed from the FEA results. The model can be reduced using by retaining modes with highest Hankel norm modes to reduce calculations effort associated with large models. Simulation results have shown that the proposed model has merit and agrees with published experimental data.
Problems and Solutions on Security of Wireless Sensor Network in Facilities on Sports Venues
Authors: Wang Wei Guo , Li Xiao Lei
Published: July 2013

Security issue of sensor networks is greatly different from that of conventional networks. In this paper, the characteristics analysis of wireless sensor network (WSN) has been carried out firstly, through analysis, the security architecture of sensor networks is proposed, trying to outline a general illustration on this area, and then security defense on the wireless sensor network security issues has been implemented secondly, finally the pairwise keying algorithm has been described and analyzed ,from above all, the ultimate security solution of wireless sensor network has been proposed.
Experimental Investigation of Environmental Monitoring System for Large Granary Based on WinCE
Authors: Zhang Xiao Dong , Yu Xin Jun , Wang Yan Ping , Zhang Jie
Published: July 2013

In order to meet the monitoring needs of grain conditions, an embedded environmental monitoring system based on WinCE was introduced in detail in this paper. The hardware of the embedded environmental monitoring platform integrated a S3C2410 ARM microprocessor for grain signals processing. A four wire resistive touch screen was adopted as the input and output tools in this environmental monitoring equipment. Furthermore, Windows CE.net was selected as the embedded operating system of the slave computer terminals. The use of Windows CE.net emulator supported the debugging and simulation of the user application programs for environmental monitoring system. Finally, the experimental investigation results proved the stability and reliability of the environmental monitoring system.
Design of Length Measurement System of Mobile Objects with Real-Time Voice Broadcast
Authors: Wang Yan Quan , Wang Gang
Published: July 2013

As an important part of modern measurement science and technology, length measurement has significant value in application and research in industrial production and teaching practice. In the paper, the length measurement integrated system integrating voice broadcast function, keyboard operation functions and real-time display is designed; composition hardware is stated and flexible software programming is used to meet requirements of system design; finally, the system is tested.
The System Architecture of Scalable Network Threat Waring Platform
Authors: Zhang Li Juan
Published: July 2013

In this paper, based on the SOA design of a large-scale network monitoring data for anomaly detection and alarm system architecture, focusing on the anomaly detection model and network threat early warning model to do an in-depth study and analysis.
Hybrid Differential Evolutionary Algorithm Based on Extremal Optimization
Authors: Wang Cong Jiao , Wang Xi Huai , Xiao Jian Mei
Published: July 2013

A new hybrid algorithm based on Differential Evolution (DE) and Extremal Optimization (EO) is proposed to solve the premature convergence and low precision of standard differential evolution when applied to complex optimization problems. The key points of it lie in: the hybrid algorithm introduced the population-based Extremal Optimization algorithm in the iteration process of DE when population aggregation got the high degree, which uses the volatility of EO to increase the diversity of population and the ability of breaking away from the local optimum. Simulations show that the hybrid algorithm has remarkable global convergence ability, and can avoid the premature convergence effectively.
Research on Communication Design of Modular Production System
Authors: Tong Yi Fei , Tang Zhao Hui , Cao Dong Mei
Published: July 2013

Touch screen is monitoring equipment used in industrial field, whose applications in industrial control will be more and more widely. With the continuous development of PC technology, the traditional man-machine interface will gradually be replaced by the man-machine interface as touch screen and so on. This paper studies structure and function of modular production system (MPS). It emphasizes on how MPS is reformed based on EV touch screen configuration and PROFIBUS-DP Field Bus. S7-300PLC as master communications with S7-200 PLCS through PROFIBUS-DP Field Bus and touch screen communications with S7-300PLC through the MPI adapter constitutes a control network. The touch screen is configured by EV5000 Configuration software, to complete the dynamic process monitoring of MPS system module, and improve the monitoring software so that it will have a simple user login management, production management, production information display and alarm functions.
A Replication Algorithm Considering the Node Traffic for P2P Networks
Authors: Zhu Yong Qiong , Hu Rui Min
Published: July 2013

In this paper we focus on replication method in unstructured Peer-to-Peer (P2P) networks. Most current replication approaches are designed for the structured P2P systems. The EAD is specific for the unstructured P2P network, but the replica utilization is low and has the bump problem. In order to acquire more replica utilization and search efficiency, we propose a decentralized replication methodsFTR. The proposed algorithm can calculate the real query flow of node according to the order of the node selected. Experiment on the simulation proves that our method can enhance search success rate and replica hit rate.
Fuzzy Clustering Segmentation Algorithm Research on Sports Image
Authors: Dong Xue Jiao , Zhang Xiao Yan
Published: July 2013

In this paper, linking with the basic principle of FCM (Fuzzy c-means clustering) algorithm, on the basis of theory research, a method of the cluster analysis of FCM is proposed. Firstly, the approximate optimal solution obtained by the improved FCM algorithm is taken as the original value of the FCM algorithm, then carrying on the local search to obtain the global optimal solution, the final segmentation result is achieved at last. The experiment results prove that in the view of the flame image segmentation, this method shows the good clustering performance and fast convergence rate, and has the widespread serviceability, so it is the practical method in image segmentation.
Neuro-Control Robustness Analysis of an Inverted Pendulum Using the Bee Algorithm
Authors: Metni Najib , Lahoud Jean
Published: July 2013

In this paper, the Bee Algorithm is used to train a Neural Network. This is done by altering the connections and biases of the Neural Network (NN) so that the desired output from the input is obtained. The merging between the two concepts is tested to control an inverted pendulum which is a benchmark for testing control theories. The trained NN is used to stabilize the pendulum in its upright position. The NN is trained by comparing its response to that of a state feedback controller. The Bee Algorithm succeeded in training the NN for it to have the desired output. Moreover, the effect of changing the parameters of both the neural network and the bee algorithm is also studied.
Wavelet Neural Network Based on Chaos Genetic Algorithm
Authors: Zhao Hu Cheng
Published: July 2013

To improve the performance of Wavelet Neural Network (WNN), a hybrid WNN learning algorithm, which is combination of Genetic Algorithm (GA) and Chaos Optimization Algorithm (COA) in a mutual complementarity manner, is proposed. In the algorithm, GA is first used to roughly search the optimal parameters of WNN as a whole, and then COA is adopted to perform the refined search on the basis of the result obtained by GA, which can make remarkable progress in modeling accuracy, learning speed, and overcoming local convergence or precocity. Simulation show its effectiveness.
Design of a Remote Monitoring System Based on the TCP/IP Protocol
Authors: Peng Rui , Li Yong Dong , Yang Guang
Published: July 2013

With the development of science and technology, the remote monitoring system is more and more widely used in management control integration systems. The remote monitoring system proposed in this paper is composed of sensor, collector adapted to various sensor signals and host computer of monitoring center. The collector whose core control chip is STR912FW based on ARM9 structure, is distributed in monitor environment as independent node, and communicates with host computer though Ethernet network (TCP/IP Protocol). It has been shown that the monitoring system has many advantages such as supporting online distributed monitoring, adding or removing nodes conveniently, low cost, high stability and high practicability.
Research and Design on Agent-Based Individualized Recommend Learning System
Authors: Zhang Chun Fei , Fang Zhi Yi
Published: July 2013

With the rapid development and wide application of information technology and internet technology, e-learning is a new way of teaching method in recent years, and it plays a significant role in the national education strategy. In this paper, an Agent-based individualized learning system is structured. And we also give the frame, algorithm, model and the knowledge representation of the system. Experimental results confirm the effectiveness of the model.
Associativity-Based Path Control Scheme in Wireless Multi-Hop Networks Using AODV
Authors: Lee Ji Hoon , Rhee Eugene
Published: July 2013

In existing on-demand routing protocols, the generated paths cannot dynamically adapt to the change of network topology even if another route with less hop is available. Routing efficiency affects network performance and lifetime. In this paper, we propose an associativity-based path control (APC) scheme that can actively adapt to network topology change due to node mobility. Each node monitors its active neighboring information and tries to meet the situation when a better local link is available. We evaluate the proposed APC scheme using analytical modeling and prove that the path available time of existing routing schemes can be significantly improved by the application of the proposed scheme.
Stability Analysis of Internal Model Based Gain Control System for Three-Level EDFA Model
Authors: Song Seong Ho , Kim Chang Seop , Kim Jeom Keun
Published: July 2013

In this paper, stability analysis of an optical fiber amplifier gain controller is presented. The mathematical model of an EDFA (Eribium-Doped Fiber Amplifier) control system is described by two-time scaled system and thus singular perturbation approach can be applied to the design and analysis of the control system. In order to handle the channel variations such as add/drop, we adopt an internal model. The performance of the control system is theoretically analyzed based on a novel singular-perturbation-like approach.
AR Based on ORB Feature and KLT Tracking
Authors: Ren Jie , Yu Yao , Zhou Yu , Wang Zi Qiang , Du Si Dan
Published: July 2013

Currently Augmented Reality (AR) simply based on natural features is not efficient. In this paper, we propose a novel simple method of AR registration using Oriented FAST and Rotated BRIEF (ORB) features and Kanade-Lucas-Tracker (KLT) tracking algorithm. First we extract ORB natural features from a reference image and the first video frame. Select the matching points using appropriate Hamming distance and Random Sample Consensus (RANSAC) algorithm. Then we track the matched ORB features of the next video frames with an updating KLT strategy. Finally we calculate and determine the camera pose using the matched feature point sets. Our experiments show that, in the cases of different scales, different angles, some changes in ambient light, complex backgrounds or part of the reference image blocked, our AR system performs well to track and position accurately. And the processing speed of our system approximately meets the requirement of real-time system.
A Segmentation Method for Multiple Sclerosis White Matter Lesions on Conventional Magnetic Resonance Imaging Based on Kernel Fuzzy Clustering
Authors: Xiang Yan , He Jian Feng , Ma Lei , Yi San Li , Xu Jia Ping
Published: July 2013

Multiple sclerosis (MS) is a chronic disease that affects the central nervous system and impacts substantially on patients. MS lesions are visible in conventional magnetic resonance imaging (cMRI) and the automatic segmentation of MS lesions enables the efficient processing of images for research studies and in clinical trials. A new method for the segmentation of MS white matter lesions (WML) on cMRI is presented in this paper. Firstly the Kernel Fuzzy C-Means Clustering (KFCM) is applied to the preprocessed T1-weight (T1-w) image for extracting the white matter (WM) region. Then region growing algorithm is applied to the WM region image to make a binary mask which is then superimposed on the corresponding T2-weight (T2-w) image to yield a masked image only containing WM structures and lesions. The KFCM is then reapplied to the masked image to obtain MS lesions. The testing results show that the proposed method is able to segment WML on cMRI automatically and effectively.
Body Measurements Extraction from 3D Scanner Data
Authors: Elbrecht Pirjo , Henno Jaak , Palm Knut Joosep
Published: July 2013

The growing power of computing, development of methods of 3D graphics for human body modeling and simulation together with development of 3D image capture technologies using 3D scanners has caused rapid development of digital tailoring - a complex of methods where made-to-measure clothing is produced starting with 3D scanning of a customer, extraction of essential measurements from obtained data cloud and then automatic production of a garment corresponding to exact measures of the customer. Extraction of exact measures from the ca 200000 data points produced by 3D scanner is a complex problem and not yet well investigated.
A Road Grade Recognition Method Based on Longitudinal Acceleration
Authors: Fu Yao , Ye Wan Hua , Lei Yu Long , Liu Zhen Jie , Zeng Hua Bing
Published: July 2013

A road grade recognition method based on longitudinal acceleration was proposed after longitudinal dynamics analysis. The method based on longitudinal dynamics utilized a real-time engine output torque signal and the real-time vehicle speed signal to calculate road grade. The result of simulation and the vehicle field test showed that the method based on existing vehicle sensors was low cost, simple and feasible, it could identify road grade.
Simulation Analysis on Ride Comfort of Heavy Vehicle
Authors: Wang Song , Liu Da Wei , Liu Wei
Published: July 2013

In this paper, a detailed rigid-flexible coupling multi-body dynamic model of heavy vehicle was established using multi-body dynamics method, and B class road model was built using harmonic superposition method. Then, the platform of heavy vehicle dynamics simulation was established. The driver seat acceleration and tire dynamic load were simulated at different speeds under the input of different random road excitations. According to the ride comfort evaluation method provided by ISO2631-1, total weighted root-mean-square (RMS) acceleration evaluation method was used to evaluate the ride comfort of heavy vehicle at different ride speeds.
Realization of a ZVS Inverting Spot Welding Power Supply
Authors: Zhao Peng Shu , Wang Xu Dong , Yang Miao Sen , Kang Kai
Published: July 2013

In this paper it constructs a phase shift to control zero-voltage-switching of high frequency inverter spot welding power supply topology structure. Through testing the former vice edge current, the system realizes the closed loop control. In this paper, it shows the working condition of main circuit modal. The experimental results proved the advantages of the topological structure.
Two Degree of Freedom Model Driven PID Control for Unstable Process with Time Delays
Authors: Zhang Li Xiang
Published: July 2013

PID control systems are the most commonly used control technology in industries. However, there are issues on control performances for the unstable process with time delays. In order to improve the control performances of PID control systems, a new two degree of freedom model driven PID control system is introduced in this paper and it is used to the unstable processes with time delay. The model driven PID control is capable of stabilizing with unstable processes by using PD feedback, regulating quickly for disturbance and tracking quickly to the change of set point. With case studies comparing with conventional PID control systems was done.