bluuebunny/crossref_metadata_2025 huggingface dataset:
An Improved RRT Based Path Planning with Safe Navigation
Authors: Feng Bin , Liu Yang
Published: February 2014

Path planning has been a crucial problem in robotics research. Some algorithms, such as Probabilistic Roadmaps (PRM) and Rapidly-exploring Random Trees (RRT), have been proposed to tackle this problem. However, these algorithms have their own limitations when applying in a real-world domain, such as RoboCup Small-Size League (SSL) competition. This paper raises a novel improvement to the existing RRT algorithm to make it more applicable in real-world.
Multi-Mode Switching Control for HSA/EHA Hybrid Actuation System
Authors: Guo Li Li , Yu Li Ming , Lu Yang , Fan Dian Liang
Published: February 2014

According to the switch transients problem existing in the Hybrid Actuation System (HAS), a multi-mode switching control system was proposed. This control system, based on the system feedback correction theory, can cater to the demands of dynamic characteristics and switch transients. To start with, the mathematical model of HAS was established on the basic of HASs operating principle, and the HAS is composed of Hydraulic Servo Actuator (HSA) and Electro-Hydrostatic Actuator (EHA). Further, the different operating modes controller are hammered out by employed the PID feedback correction control, and the acceleration feedback controller is added to the switched system to decreasing the switch transients. Finally, simulation results demonstrate the system is precise in tracking displacement signal, and it is validity of mitigating the switch transients by used method of feedback correction.
An A Priori Planning of Joint Motions for USV as a Problem of Guaranteed Control/Estimation
Authors: Kruglikov Sergey V. , Kruglikov Alexey S.
Published: February 2014

Navigation and routes planning for a group of unmanned surface vessels (USV) jointly moving in complex environment, including circumvention of seashore and islands, are important applications of computer-based decision-making support systems. A group of objects as an open complex system includes several hierarchy levels and may be controlled by a decision-maker supported by information-analytical software and methodical maintenance. Planning, as a stage of management, includes an a priori phase guidance for all objects in the group, coordinated in both time and directions of approach to the target set restricted by a set of obstacles. A discrete system of priorities reflects relative preferences of importance and allows choosing routes optimal in different senses. One can formalize such tasks in terms of different mathematical models including control problems of formation motion, theory of extreme networks and interval analysis. The paper bases on guaranteed approach to control of dynamic objects under uncertainty. Unified mathematical descriptions of shores, routes of individual objects and the whole group may be given in terms of hierarchic (i)-systems. This allows to reconcile data on geography, environment, object characteristics, peculiarities of control systems and data transmission, including sources and causes of uncertainty, and to describe movement of a group as an extreme problem of control and estimation. The results of computer simulation are considered. One may use similar models to explore economic aspects in application of heterogenic complex of autonomous surface and underwater vessels.
Optimal Control Theory Research on Inverted Pendulum System
Authors: Wu Shuo Mei , Song Jian Wei , Zhang Wen Qing
Published: February 2014

The state space expression can be deduced by establishing the mathematical model of inverted pendulum system. In this paper, linear quadratic regulator (LQR) is used to control the inverted pendulum system, providing better balance between system robustness stability and rapidity. The simulation structure shows that the better the system anti-interference capability is, the shorter its recovery time is. Good control effect can be achieved by applying linear quadratic optimal control in the control of double inverted pendulum balancing system.
The Development of Underground Power Transmission Line Inspection Robot
Authors: Tang Shu Feng , Chen Shi Hui , Zhou Peng , Wang Biao , Guo Xiao Hong
Published: February 2014

The small underground power transmission Line inspection track robot is developed. The robot is composed of left and right track walking mechanisms driven independently and camera tripod head with better environmental adaptability and flexibility of movement. The robot is controlled by wireless remote control mode. The portable handheld controller is also developed with communication, control, display and storage function. The inspection work experiment at the cable room of 110kV underground substation has been done using this robot. The result indicates that the inspection robot has better flexibility of movement, better reliability of communication and better convenience of operation, which is the better method for underground power transmission Line inspection.
Terminal Sliding Mode Control of a Lunar Lander with Electric Propulsion
Authors: Yang Bo , Miao Jun , Yang Yong
Published: February 2014

This paper presents an attitude control method based on electric propulsion systems for the lunar lander that considers the important characteristics of nonlinearity and uncertainty of lunar soft landing maneuvers with large attitudes. The attitude control law is designed according to the terminal sliding mode variable structure control method. A soft lunar landing utilizing the proposed control method is simulated, and the results show that this attitude control system demonstrates superior global robustness, consumes less propellant, and can achieve higher precision than a conventional chemical propulsion-based control system. For a lunar lander with a pulse plasma thruster as the propulsion system, the attitude control precision of the system is 0.002 degrees when the attitude control force is 0.1 Newtons. When a conventional chemical, not electric, propulsion thruster is used, if the attitude control force decreases by one order of magnitude, then the control precision of the lunar lander decreases 10-fold. This study demonstrates that a terminal sliding mode variable structure control method combined with low level thrust electric propulsion can improve the precision of lunar soft landings.
Study of PID Control Algorithm Based on the Critical Ratio Method
Authors: Wang Wen Bin , Liu Dao Yuan , Yao Yu Qin
Published: February 2014

PID control is one of the earliest control strategy and till has the most widely use in the industrial process at the present. The PID parameter tuning and optimizing decide what the control performance of the control system can achieve. PID parameter tuning is the core content in control system design. In this paper, aiming at the complexity of PID parameter tuning process, the critical ratio method was optimized and propose a simple and effective method of tuning PID parameters. By simulation, this method turn out to be simple and effective, good real-time performance.
Permission Centralized Control System Based on LDAP and Module
Authors: Tang Jian , Xiao Chang Shui , Wu Jian Ping
Published: February 2014

The users and permission management functions of multiple application system will increase management complexity, reduce the convenience of users using.Analyze the module features of application system , LDAP technology , XML and RBAC technologies,etc. to build a permission centralized control system and combine with configuration file to solve the docking problems between various application systems and control systems.The system achieve unified management of users, permissions, application modules and access control and improve management efficiency and user experience.
Multiple Model Based Robust PID Control for Superheated Steam Temperature System
Authors: Liu Li Hua , Wei Xiu Kun
Published: February 2014

Temperature of superheated steam in power generation units is essentially important for the safe and economic running of boilers and turbines. In this paper, a robust PID control strategy based on multiple models is proposed. Robust PID controllers associated with each model are designed with parameters tuned based on the H performance. For different operating conditions, the appropriate controller is selected by the given switching strategy. Simulations are done to prove the effectiveness of the control strategy.
Environmental Modeling and Walking Simulation of Quadruped Search-Rescue Robot Based on VRML
Authors: Wang Peng , Li Ji Xiang , Zhang Yuan , Jiang Wen Hao
Published: February 2014

In order to create the virtual earthquake environment, VRML modeling language is used to build a real environment that is a 3D mountain scene after earthquake. A simulation model of quadruped search-rescue robot is established in VRML modeling technology. The walking stability of quadruped search-rescue robot is observed using the VRML model established with the change of gravity curve. Simulation results show that the gravity displacement curve of the robot is smooth.
Real-Time Micro-Fluidic Chip Pressure Control System Base on the Optical Interference
Authors: Liu Kan , You Hao
Published: February 2014

This article introduces a measurement system based on LabVIEW used for optical interference fringe on micro-fluidic chips. This system mainly uses cameras to capture real-time images of wedge interference fringe on micro-fluidic chips, then the collected images will be binarized by LabVIEW. The processed images will be divided by zone , determine the flatness and gap thickness of the micro-fluidic chips by interference fringes with different directions of deflection and numbers. Finally, feedback from measured data will be used to adjust the flatness and gap thickness of micro-fluidic chips in order to meet the requirement of tests.
Simulated Annealing Algorithm Based Single Robot Odor Source Localization Strategy
Authors: Cui Shi Gang , Zeng Guang Ming , Liang Fan , Dong Jiang Lei
Published: February 2014

This paper presents a search strategy for single mobile robots to realize the active olfaction (also called odor/gas source localization or plume tracing). The odor source localization is regarded as a kind of dynamic function optimization problem in this article, using the simulated annealing algorithm to calculate the optimal solution of density distribution function, namely the odor source location. The simulation experiments results in indoor ventilated environment show that the robot can track in plume and locate the odor source under the area of the 10m*10m, and it can effectively jump out of local maximum values in the process of search.
Radiation Characteristics of Heat Sink in Propulsive Wheel of Mobile Robots
Authors: Xu Yan , Xu He , Luan Yu Kun , Gao X.Z. , Xue Kai
Published: February 2014

Electromagnetic interference easily appears in the propulsive wheel - a key component of the mobile robots, because internal space of propulsive wheel is very small, there are numerous electronic devices, and signal communication is complex. So electromagnetic shielding is very important for the propulsive wheel. In this paper, a wheel model and an equivalent source model of electromagnetic interference of the wheel were developed based on considerations of the internal electromagnetic properties. At the same time, a secondary source of electromagnetic interference is formed by heat sink. Hence, shielding effectiveness is taken as one of the evaluation criteria for the Electro-Magnetic Compatibility (EMC) problem, and the Genetic Algorithm (GA) in the software Ansoft HFSS platform was used to optimize the first resonance frequency of heat sink.
Design and Experimental Study on Fuzzy Self-Adaptive Controller of Common-Rail Pressure for DME Engine
Authors: Li Wei , Han Ran , Wang Wen , Li Fan Bin
Published: February 2014

A fuzzy self-adaptive PID controller is developed for controlling the pressure of the common-rail of DME (Dimethyl Ether) engine, and the performance test was carried out on a pump test bench. The results showed that the lag time of pressure following was not more than 0.34ms when the set value of common rail pressure stepped under the different speed, and the fluctuation value of common-rail pressure did not exceeding 0.5MPa while the target pressure changed from 5MPa to 11MPa, and the rail pressure fluctuation decreases rapidly with the target pressure increased, and the rail pressure fluctuation value did not exceeding 0.1MPa when the target pressure reaches at 11MPa. All these results fully illustrated that the fuzzy adaptive PID controller possesses the common advantages of PID controller and fuzzy controller, and the regulator of common rail pressure has the advantages of fast response, small static error, tiny overshoot, good robustness and quite stability.
Space Motion Planning for one Kind of Six-Axis Robot Based on Inverse Kinematics
Authors: Jin Xu , Yan Gang Feng
Published: February 2014

Robot control is of great importance in modern industrial manufacture. This paper introduces a motion planning of one kind of six-axis robot. D-H Model and transfer matrices are constructed based on a certain kind of six-axis robot. Inverse kinematics method is applied to obtain every angle of axes, which can work out the space trajectory in DSP with an interpolation method. Experiments and simulations show that the motion planning achieves a quick response and high accuracy.
Research on the Split Electric Variable Transmission for Hybrid Electric Vehicle
Authors: Xu Qi Wei , Xu Jia Ning
Published: February 2014

This paper introduced an advanced electric variable transmission used in hybrid electric vehicle, and analyzed the operating mode in hybrid electric vehicle. For the strong flux coupling of EVT, a kind of split electric variable transmission used in hybrid electric vehicle was expatiated, and the parameters of split electric variable transmission were designed. The simulation model of HEV using the split electric variable transmission was completed using Matlab/Simulink, and the experiment test bench was built. The simulation and experiment results demonstrate the feasibility of the proposed method, and it can be taken as a new theory and method for the study of hybrid electric vehicle.
The Design and Simulation Analysis of Halbach Permanent Maglev Positioning Platform
Authors: Xie Hu , Ma Shu Yuan , Li Wen Bin
Published: February 2014

The thesis put forward a new maglev positioning platform whose structure, theories of operation and modeling were discussed. Applying finite elements methods in electromagnetic simulation and thermal simulation of the structure, the feasibility of the new platform was proved.
Analysis on Obstacle-Surmounting of Coal Mine Detection Robot with Mechanical Arm
Authors: Hu Han , Niu Zhi Gang
Published: February 2014

This paper took the coal mine detection robot model TUT-CMDR for research. First of all, the three degrees freedom mechanical arm was installed on the robots body. By the same time, the theory of Euler angle and D-H method were established to analysis the posture and position of robot body and mechanical arm. After the integration, the centroid coordinates on the robot in any location was calculated. In the next place, mechanical arm angle change and the size of the load effect on both forward obstacle-surmounting and the barrier height were discussed. In the end, the three dimensional relationship diagrams of barrier height, barycenter, pitch angle, arms' swing angle and mechanical arms swing angle were drawn and the results of mechanical arm gesture planning were compared with the initial state. The theory will provide basis for robot obstacle-navigation control.
Control Point Optimization and Simulation of Dental Arch Generator
Authors: Jiang Jin Gang , He Tian Hua , Dai Ye , Zhang Yong De
Published: February 2014

During the manufacture of complete denture, the most important step is to design and generate the dental arch curve which adapts to the requirement of patients according to the jaw arch morphology of them. It is important to study the optimization method of the number and position of control point for the dental arch generator. On the basis of motion analysis of the dental arch generator, objective function, multivariate design and constraint function of control point optimization of dental arch generator is determined. Control points number and position of the dental arch generator is optimized. Simulation results verify the feasibility of control point optimization method.
Study on Six-DOF Electric Platform Adaptive Control
Authors: Gai Yong Jun , Wang Jing Quan
Published: February 2014

As the six-DOF electric platform, we establish the single-channel electric platform model on the basis of strongly coupled, nonlinear and strongly interferential AC servo motor driven platform system, and design the electric platform model to improve the dynamic response character and robustness. This study is based on the task space control policy to solve the control problem in various environments. Whats more, the introduction of dynamic surface avoids the acceleration feedback. The simulation result illustrates that it has effectively inhibited the system parameter uncertainty, and the impact of cross-linking coupling between nonlinear dynamics and DOF. Thus the system dynamic performance is improved, and the tracking capability is increased.
Research and Design of Embedded CNC System Based on CAN Bus Technology
Authors: Cheng Yan Hui
Published: February 2014

This paper is based on the expansion of the CAN bus interface on ARM so that the embedded CNC system to achieve network, and display their respective advantages of field bus technology and embedded technology, so that to set up local area network embedded NC system model. The CNC system designed in this paper has characteristic as follows: high integration, flexible structure, good expansibility and the high performance-to-price ratio and so on.
Simulation Research on Aerodynamic Characteristics of Vehicle under Steady Crosswind Based on XFlow
Authors: Han Shan Ling , Li Zhi Yong , Li Jin Bin , Yu Ru Xing
Published: February 2014

The aerodynamic characteristics of vehicle play a crucial role in steering stability, comfort and safety of vehicle. The crosswind will affect the aerodynamic characteristics of vehicle. In this paper, the aerodynamic characteristics of ASMO model under steady crosswind is simulated by XFlow software, and the changes of aerodynamic characteristics under different steady crosswind are analyzed. It turned out that the asymmetry of wake flow field is enhanced with the increasing of crosswind, and the body surface pressure of windward is amplified, the six components of aerodynamic coefficient are also increased. It is found that the vehicle aerodynamic characteristics changed obviously under steady crosswind.
Torque Ripple Reduction of Switched Reluctance Motor by Optimizing Stator Pole Type
Authors: Wu Hong Xing , Sun Qing Jie , Zheng Ji Gui , Zhou Shou Ming
Published: February 2014

The torque ripple is the important restriction affecting the promotion and application of switched reluctance motor, the analytic expressions to calculate switched reluctance motors tangential force and radial force are derived in this paper, based on analyzing the cause of switched reluctance motor vibration and torque ripple. By improving the stator poles structure, the torque near the commutation points is compensated, which smooth the wave of air gap magnetic field to reduce torque ripple when the stators and the rotors salient poles coincide. In this paper, three structures that puts wedge angle on both sides of the stator poles is presented, and analysis of torque ripple is made. Studies shows that the right size of wedge angle can effectively inhibit the switched reluctance motor torque fluctuations.
Application of Random SVPWM Technique
Authors: Zhu Jian Guang , Yan Sheng Kun , Yu Shen Bo
Published: February 2014

This paper analyses the harmonic distribution of current and voltage of inverter output based on RSVPWM control strategy and compares the result with normal SVPWM strategy. It gives the random strategy and verifiesthe strategys feasibility. Experimental results show that RSVPWM control method makes harmonic energy evenly distributed in wide frequency band, and changes the original discrete harmonic spectrum into a continuous spectrum on the whole frequency band as much as possible. Random switching frequency SVPWM control scheme could reduce the harmonic energy which focuses on the integral multiple of switching frequency, thus reducing electromagnetic noise and mechanical vibration.
Fuzzy Recursive Integral PI Control for Three-Phase Four-Wire Shunt Active Power Filter
Authors: Song Ming Zhen , Chen Zhi Bin
Published: February 2014

This paper focuses on the current tracking control of three-phase four-wire active power filter (APF). The conventional PI control method usually causes a large deviation of the harmonic compensational current, and results in a slow response, which means that harmonic compensational performance under the conventional PI control is not ideal. In order to improve the compensation performance and the dynamic response speed of APF, the authors present a new control strategy by integrating the parameters online tuning of fuzzy adaptive with the recursive integral PI control algorithm. New algorithm takes full advantages of the characteristic of integrating the deviation of each sample-point of the recursive integral PI control and the adaptive merits of the parameters online tuning algorithm. The simulation experiments indicate that the control algorithm is feasible and can effectively improve the harmonic compensation performance of active power filter.
Novel High Voltage Switch for Damped Oscillatory Voltage Testing System
Authors: Hou Zhe , Huang Zhi Wei , Xue Rong , Huang Chen Xi , Li Hong Jie , Ji Sheng Chang
Published: February 2014

This paper describes the development of a novel high voltage (HV) switch for use in the damping oscillating voltage testing system. Specialized for up to 10 kV rated XLPE partial discharge test application, the switch consists of ten identical IGBT function units in series connection and has a maximum voltage of 20 kV. To solve the synchronization problem of the gate signal, we used the optical fiber to trigger the units. A multiple isolation power-supply system is used for the drive circuit. The operation of proposed switch is tested on an equivalent specimen, confirming the feasibility of this kind of application.
Development of Damped AC Voltage Generator for the Partial Discharge Detection of Distribution Power Cables
Authors: Zhang Wei , Xue Rong , Huang Zhi Wei , Huang Chen Xi , Li Hong Jie , Liu Chong Xin
Published: February 2014

This paper presents the development of the Damped AC (DAC) voltage generator for the detection of partial discharge (PD) in distribution power cables. High voltage semiconductor switch (HVSS) and air-core inductor are the key units in the DAC test system. Series connection of insulated gate bipolar transistors (IGBTs) was used to achieve the 20kV HVSS. Based on the Neumanns formula, the inductance of the air-core inductor was investigated. Finally, the performance of the developed DAC system was tested on a 8.7/15 kV cross-linked polyethylene (XLPE) cable in the laboratory, where artificial defect of missing stress tube is made in the cable termination.
A Technique for TEV-Based Detection and Location of Partial Discharges on MV Metal-Clad Switchgears
Authors: Huang Rong Hui , Li Rui Peng , Yu Ying , Zhang Long , Xing Ya , Li Hong Jie
Published: February 2014

The principle of detection of partial discharge in MV Metal-Clad Switchgears utilizing Transient Earth Voltage (TEV) method is introduced and some problems in application of the traditional PD detection systems are summarized and analyzed. After that, an improved PD detection system is proposed and established with an advanced technique. The technique involves use of energy method to determine time difference among multiple signals and external trigger method to realize phase integrity during data acquisition process. Laboratory experiment and site tests are conducted and it is proved that the improved detection system is of great effectiveness in PD location and interference identification.
Characteristics of Partial Discharge in Cross-Linked Polyethylene Insulation Cable under Damped AC Voltage
Authors: Zhang Wei , Huang Zhi Wei , Xue Rong , Zhang Long , Li Hong Jie , Liu Chong Xin
Published: February 2014

Partial discharge (PD) diagnosis techniques are widely used in the insulation condition monitoring for power cables. In this paper, the damped AC (DAC) voltage method was used to study the PD characteristics in the heat-shrinkable cable accessories. Four different cases of artificial defects in cross-linked polyethylene (XLPE) cables were investigated, and these defects include termination without stress tube, incorrect use of insulation tape as the semi-conductive adhesive tape in the middle joint, void and metal particles on the surface of XLPE insulation. Furthermore, the PD inception voltage and patterns obtained under the DAC voltage are compared with the AC test results.
Design of Soft-Switching Control Circuits in Vibrating Screen Invert Power Source
Authors: Li Xin Wei
Published: February 2014

A new control system of vibrating screen invert power source was designed according to the question of step regulation of current and power in vibrating screen in the use of MCU. Zero-voltage switching inverter is used to reduce the loss of switching devices in the main circuit and MSP430 MCU is the core of the control circuit. A PI voltage regular with a filter and a feedback type, IGBT over-voltage protection circuit and PWM pulse generating and drive circuit are designed. Experimental results show that the inverter power has high precision, fast response, and anti-interference ability, and the system can obtain better steady state accuracy and dynamic characteristics and greatly improve the efficiency of shaker.
ZPW-2000 Track Transmission Network Modeling and Analysis
Authors: Huang Bin
Published: February 2014

In order to study and improve the track circuit system,we preliminary study and model for ZPW-2000A no track circuit transmission network of automatic block for in china, through the insulation of domestic ZPW-2000 no track circuit transmission network system model and simulation,we verified that the simulation results and field device test results is consistent . Simulation results show that the track circuit transmission network mathematical model is correct and effective, for further study made ZPW-2000 laid the foundation for the track circuit.
ZPW2000 Rail Transmission Network of Compensation Capacitor Analysis and Ponder
Authors: Huang Bin , Wu Jian Jun
Published: February 2014

In order to better research and design track circuit system, this paper analysis and calculated compensation capacitor of the ZPW2000 no insulation track circuit, and verified the consistency of the experimental results and the practical installation situation. Analysis results also show that, through the appropriate compensation capacitor, the no insulation track circuit transmission distance significantly increased.
A Novel Method for Investigating the Frequency Dependent Behavior of Instrument Transformers
Authors: Feng Yong Xin , Li Zhao , Gao Ya Qi , Shao Bing Ran , Ding Xue Wen , Zhou Yi
Published: February 2014

This paper describes the structure and the principle of the NI DAQ based measurement system used for investigating the frequency dependent behavior of instrument transformers in the high voltage system. A computer based NI DAQ card is utilized as the data acquisition system in the new measurement system. The software digital filter and the phase locked loop are implemented to obtain the magnitude and phase angle, respectively. With this measurement system, we investigated frequency responses of several voltage and current transformers at the converter station of the Germany railway.
The Research Status and Development Trend of Active Power Filter
Authors: Ma You Jie , Yuan Hong De , Zhou Xue Song
Published: February 2014

Power quality is getting worse with the extensive application of nonlinear loads, and active power filter technology is the effective way to settle the problem. This paper introduces the basic theory and the sorts of active power filters at first. Then the key technologies of active power filter are discussed in detail. Finally, based on some problems about current situation of active power filters, the directions of its development are analyzed in this paper.
A Method to Estimate Voltage Sag Caused by Transformer Excitation Inrush Current
Authors: Pan Ai Qiang , Luo Ling , Jin Jia Pei , Wu Xiao Qing
Published: February 2014

Due to excitation inrush current, no-load transformer accesses system can cause different degree of voltage sag. Therefore presents a method to estimate voltage sag caused by closing no-load transformer. Firstly, accord to the point of saturation magnetic flux and transformer core general single value curve equation to establish general nonlinear magnetization curve. Use the linear features of saturated magnetization curve segment to estimate the maximum inrush current and calculate the maximum depth of voltage sag. According to the magnetic flux decay time to estimate the duration of voltage sag. Simulate closing no-load transformer in a 10kV distribution network, and compare the simulated result with the calculated result. The results show that the proposed method is validity and accuracy.
Research on the Effect of Alignments of Mountainous Highways on Driver Characteristics
Authors: Li Rong Jing , Mo Qiu Yun , Zhang Ke Yan
Published: February 2014

Fatigue driving becomes a main hidden danger for traffic safety and endangers peoples life and property seriously.This paper is to obtain the effect of alignments of mountainous highways on driver characteristics. this paper combines with all kinds of theoretical methods and research means on physiology, medical psychology and engineering psychology, then this paper models regression equation on driver's growth rate of Heart Rate and alignments index of mountainous highways, and analyses driver's heart rate variability (HRV). The results show that: when the slope of long downhill is about 3.5%, drivers growth rate of HR exceeds 40%, which is the most nervous state. And during the downhill, the value of LF / HF appears to be rising, which indicates that the more active of the drivers sympathetic nerve, the more likely to be tired. The study has a certain realistic guiding significance on mountain highways slop design and fatigue driving alarm. This acquisition system is easy to operate with high accuracy which can meet the all-weather, dynamic monitoring and real-time processing requirements. Aim at the national highway 321 that from Guilin to Longsheng, the research on the design and revise of the highway slope has a certain realistic guiding significance.
A Method for Extracting Acoustic Emission Signal Frequency Characteristics of Polluted-Insulator Discharge
Authors: Yi Man Cheng , Fang Jian , Wang Yong , Li Zhi Ning , Gu Chun Hui , Shu Nai Qiu , Li Zi Pin
Published: February 2014

Experimental studies have shown that Acoustic Emission (AE) signals generated by the polluted-insulator discharge contain information of discharge energy. To extract the frequency characteristics of AE signals in polluted-insulator discharge, algorithm combining the empirical mode decomposition (EMD) and fast fourier transform (FFT) is used. Through a great many of artificial contamination experiments, the AE signals in different contamination discharge stages are collected, and the frequency characteristics can be extracted by the method presented in this article. The results show that the frequency characteristics of AE signals can be effectively extracted by the proposed method, which gives the right corresponding relationship between frequency characteristics and the polluted-insulator corona, partial and arc discharge. It also provides technical support for monitoring the intensity of polluted-insulator discharge and the change of external insulation status. The method for extracting AE signal frequency characteristics proposed in this paper has been applied to on-line monitoring of polluted-insulator external insulation status and good results have been achieved.
Induction Motor Vector Control Based on Adaptive Identification of Rotor Parameters
Authors: Xu Qi Wei , Xu Jia Ning
Published: February 2014

The paper analyzed the influence of rotor parameters changing for the induction motor vector control, and an adaptive identification method for rotor parameters was proposed. Based on Lyapunov stabilization theory, design method of adaptive identification discipline was expatiated. The model of rotor parameters adaptive identification under induction motor vector control was completed using Matlab/Simulink. The simulation results demonstrate the feasibility of the proposed method, and it can be taken as the theory and practice reference for improve the orientation bias for vector control system.
Software Development of On-Board Power Electronics Equipment Using Model-Based Design Methodology
Authors: Liu Xiao Fei , Cui Shu Mei , Gao Wei Feng , Cui Shu Mei , Xu Shi Ming
Published: February 2014

Model-Based Design (MBD) method is applied to power electronics device software development to overcome the problem of low efficiency in manual programming. The concept of Model-Based Design and several common development platforms are introduced. Based on tools in Simulink, an on-board charger control software is developed. Meanwhile the hardware platform, the model building, the model validation and the automatic code generation are also described. Experiments are carried out in the hardware platform to verify the correctness and feasibility of the codes.They are helpful for the software development of power electronics equipments.
Short-Range Wireless Technology in Electric Power Equipment Application
Authors: Cui Bang Jun
Published: February 2014

In this paper, short-range communication technology, power transmission or for certain control devices, has developed an easy to monitor and control the local portable handheld device, meet people based portable monitoring requirements, first, short-range wireless communication module design, followed by the portable handheld device and GIS controller design, and ultimately lower PC and wireless communication between machines. To achieve the purpose of the portable control.
An Improved Switched-Inductor Z-Source Inverter
Authors: Chen Jian Gan , Cai Chun Wei , An Pu Feng
Published: February 2014

This paper presents an improved switched inductor (SL) Z-source inverter, which is derived from the classical SL Z-source inverter. To decrease the input current ripple, the proposed inverter employs an LC boost impedance network between the source and Z-source network. Compared with the SL Z-source inverter, the proposed inverter has the constant input current from the source and increases voltage boost inversion ability significantly. Topology analysis in the steady state is given, and simulation results verify the theoretical analysis results.
A Fault-Tolerant Control Strategy for Cascaded Multilevel Converter
Authors: Zhang Tong Shuo , Liu Xue Bo , Wei Tong Zhen , Han Li Bo
Published: February 2014

The cascaded multilevel convertor has the following advantages: simple structure, less harmonic, and less switching loss. It also can easily achieve high voltage and large power capacity. However, due to the structure of cascaded, the number of the device increases with the increment of capacity, meanwhile the reliability of the system reduces. Based on the cascaded multilevel systems possible failures and the characteristic of carrier phase shift modulation, this paper proposes a fault diagnosis method suitable for the cascaded multilevel system. Firstly, the paper introduces the basic principle of the proposed approach, and then it deduces the major implementation steps, finally the correctness and reliability of the method are validated by the simulation.
Conjoint Simulation of Active Suspension and ABS
Authors: Zhang Lei , Dong En Guo , Lou Jie Xun
Published: February 2014

A conjoint simulation of suspension system and brake system is proposed based on vehicle braking performance and ride stability. A half car simulation model is built applying the software of MATLAB in which the dynamic load is used to control the active force for suspension system and adjust parameter value of ABS (Anti-lock brake system). The suspension system and ABS construction of the half car simulation model is illustrated in detail. Using the simulation model, the braking distance, the stroke for suspension and the pitch angle of body are measured in three status which include the individually control for active suspension, the individually control for ABS and the integration control respectively. The simulation data show that the integral control method synchronously ensures braking stability and riding stability.
A Design of Flywheel Energy Storage System Discharge Circuit Based on PWM Technology
Authors: Zheng Ling Bo , Li Guang Jun
Published: February 2014

This template explains and demonstrates how to prepare your camera-ready paper for a flywheel energy storage system discharge circuit based on PWM control technology is introduced. The main circuit structure is given and the working principle is analyzed. On that basis, the detailed design method of high-frequency transformer, PWM control circuit and the driving circuit is introduced. The discharge system with the output power of 480W and the output voltage of +48V is designed by applying the method and the experimental waveforms are provided.
Research on the Fuzzy PID Speed Control System of Permanent Magnet Linear Synchronous Motor Based on Genetic Algorithm
Authors: Liu Jun , Xie Qian Wei
Published: February 2014

Focusing on the non-linear, time-varying, strong coupling and external load disturbance existing in PMLSM, a fuzzy PID controller based on genetic algorithms is designed to control the speed of PMLSM by absorbing the advantages of PID control and fuzzy control, and the genetic algorithm method is used to optimize fuzzy control rules. A simulation experiment was made to compare the effects of traditional PID control and fuzzy PID based on genetic algorithm control by Matlab. The simulation results verify that fuzzy PID control based on genetic algorithm is superior to PID control in dynamic stability performance and speed tracking power.
The Vector Control of PMSM Based on the Inverse System Theory
Authors: Shi Rui , Li Tai , Kong Ling Kai
Published: February 2014

Against the existing poor dynamic performance, difficult to adjusting parameters of the controllers issue in PMSMs vector control system, based on the PMSM's dq rotating coordinate model, an inverse system model of PMSM is deduced. And a pseudo linear system realizing the decoupling of the d-axis current and mechanical velocity is constructed. By synthesizing the pseudo linear system, a sliding mode variable structure controller is proposed. In order to estimate rotor's position and speed, a reduced order observer for back electromotive force is proposed. At last some simulations are proceeded to verify the proposed system's performance. The simulation results show that the control strategy mentioned in this paper has good dynamics, steady state performance. Rotors position and speed can be accurately estimated by the proposed method.
Multi-Objective Operation Optimization of a Micro-Grid Using Modified Honey Bee Mating Optimization Algorithm
Authors: Wu Li Zhen , Hao Xiao Hong
Published: February 2014

Recently, it becomes the head of concern for the Micro-grid to derive an optimal operational planning with regard to energy costs minimization, pollutant emissions reduction and better utilization of renewable energy sources (RESs), which accompanied by a Wind Turbine/Fuel Cell/Photovoltaic and Battery hybrid power source to level the power mismatch or to store the surplus of energy when its needed. In this paper, a new method based on multi-objective Modified Honey Bee Mating Optimization (MHBMO) algorithm is proposed and implemented to dispatch the generations in a typical micro-grid considering economy and emission as competitive objectives. The problem is formulated as a nonlinear constraint multi-objective optimization problem to minimize the total operating cost and the net emission simultaneously. The proposed algorithm is tested on a typical MG and its superior performance is compared to those from other evolutionary algorithms such as GA (Genetic Algorithm) and the original Honey Bee Mating Optimization (HBMO).
Research of Energy Optimal Operation on Building Cooling Heating and Power System
Authors: Ma Jing Chao , Chang De Zheng , Xu Xiao Guang , Wang Zhe
Published: February 2014

An energy optimizing operation model of BCHP distributed energy supply system is proposed in this paper. The objective function and its constraint conditions are determined so as to minimize the total cost. Not only the cooperation between BCHP and electric air conditioner, but also the influence of spot price of electricity is considered in this model. According to the demand forecast of cooling, heating and power load, operation schemes of some different typical days of BCHP system are optimized. Improved particle swarm optimization algorithm is adopted to solve the energy optimizing operation model for BCHP. Taken an actual commercial building as an example, this paper makes a comparison between BCHP system and separate supply system under the condition that electricity micro turbine generated is allowed to be sold to utility.
Correlation Analysis and Modeling of Main Parameters in Thermal Power Unit under FCB Conditions
Authors: Chen Shi He , Luo Jia , Zhang Xi , Huang Wei Jian , Wen Xiao Qiang , Sun Ling Fang
Published: February 2014

Fast Cut Back condition is one of the most severe dynamic transient operation conditions for coal-fired power units. Here has carried out the study on the main parameters correlation analysis and system modeling of No. 2 unit from HaiFang thermal power plant. The prediction results show the model built here is reasonable and feasible. Besides, from the process of correlation analysis, it is obvious that Pearson correlation coefficient could be used for compression of information features in order to reduce the dimension of the model.
Specific Risks Assessment of Resource-Based Urban Power Network Planning
Authors: Wang Jing Min , Wufuer Maimaitiaili , Guo Xiao Fan
Published: February 2014

Western resource-based city (WRC) develops rapidly under the develop-the-west and energy resource development strategy. Both of the economy growth and the resource exploitation will make greater demands on the science of power network planning. Therefore, urban power network planning will face more specific risks. Based on fuzzy membership theory, this paper studies the risk identification of WRC power network planning, and summarizes the key risks. Finally, we identify the risks from aspects of policy, economy, environment and load systematically, establish an evaluation index system of specific risks of WRC power network planning, and provide fundamental decisions for risk aversion of WRC power network.
Application of Static Reactive Power Compensation Device in Power System Stability
Authors: Pei Yu Jie , Wang Qing Hao , Xu Jian Guo , Li Zhi Gang , Liu Bo , Hao Wen Feng , Liu Jing
Published: February 2014

With the rapid economic development in Liaoning Province, very rapid growth in electricity load, especially steel and fused magnesium commercial power. After the implementation of TOU price, Liaoning power grid voltage fluctuation is increased by that some enterprises were concentrated in low hours of electricity. Some power users were affected by lacking the means of dynamic reactive power. To point the necessity of application of the SVC, the existing of 66kV and 220kV grid power quality status are analyzed and simulated. The SVC compensation capacity and filter parameters are systematically design, after the transformation of the system and the simulation proved that the grid can achieve the design requirements.
Optimization Scheme of Load Transferring Path for Distribution Network
Authors: Bai Xin Lei , Guo Li Ping , Liu Liang Ze
Published: February 2014

For the power distribution network load transferring path optimization problem, this paper focuses on optimization scheme of load transferring path based on the fast non-dominated storing genetic algorithm (NSGA-II) with elitist strategy, this proposed method can avoid the selection of weight and the preference of the solution, and the solution sets can highlight the essence of optimization problems, then the fuzzy theory and the entropy weight are employed to extract the comprehensive optimal solution. IEEE33 node system simulation results verify the effectiveness of the model and algorithm.
Research on Application of Cloud Storage in Smart Distribution and Consumption Integrated Management System
Authors: Wang Bao Yi , Luo Chao , Zhang Shao Min
Published: February 2014

At present, the situations of long period independent operation of each kind of distribution and consumption management system and lack of effective integration, it obstructed the inter-departmental coordination of business operations. According to IEC61968, the paper proposed a smart distribution and consumption integrated management system that integration of existing systems at the distribution and consumption side. The system can solve the problem of information islands. With the scope of the power system data acquisition continues to expand, in the future need mass data storage and analysis capabilities, it is insufficient of the existing storing and information-processing platform of the power system, the cloud storage based on Hadoop can solve the problem. The Experiments show that cloud storage based on Hadoop clusters has characteristics of high throughput rates and high transmission rate, which can meet the mass data storage access requirements of the smart distribution and consumption integrated management system.
Visualization Methods of Regional Power Load Density Based on the Heatmap Technology in WebGIS
Authors: Zhang Shao Min , Xie Wen Long , Wang Bao Yi
Published: February 2014

The traditional power system shows regional power load density using the dot density way, while it performs some shortages in showing regional density visualization during zooming in webgis process. By improving density point generation algorithm and using heatmap technology, this paper designing and implementing the visualization method of regional electricity load density which is based on heatmap technology in WebGIS (web geographic information system). Also, this paper shows that the image rendering performance and map zoom visual performance are improved when using heatmap method performs regional power load density through experiments.
Research on Transfer and Replacement Mechanism Design of Inter-Provincial Electricity Treatment in South China Electricity Market
Authors: Zhang Sen Lin , Sun Yan Ming , Jing Zhao Xia , He Zheng Xin
Published: February 2014

In the context of south china electricity market, the concept of contract transfer and replacement deal is set forth in advance which is specialized in electricity treatment. Then, the feasibility of conducting an inter-provincial contract transfer and replacement is analyzed according to the aspects of physical characteristics, economics and policies within the china southern power grid. In addition, the advantage and disadvantage are also presented in terms of bilateral negotiation and centralized biding transaction modes. After that, the pricing mechanism and transaction mode are deliberately designed pertaining to three different situations including a party power shortage and a party "abandon water", a party power supply shortage and a party power surplus and a party power surplus and a party "abandon water". Finally, the realistic feasibility of the proposed schemes is verified through an employed numerical example.