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International Conference on Electrical and control Engineering, ICECE 2010

作者： Jianghong, Sun Yunbo, Zuo Xu, Xiaoli School of ElectroMechanical Engineering Beijing Information Science and Technology University Beijing China School of Mechanical and Vehicular Engineering Beijing Institute of Technology Beijing China Beijing Key Laboratory - Measurement and Control of Mechanical and Electrical System Beijing China

ISBN: (纸本)9780769540313

Data process of large rotating machinery is in line with basic features of information fusion. A framework of fault diagnosis and prediction based on sensor information fusion is built. An improved extracting method of features is used to deal with the information fusion of single sensor, which raises the calculation efficiency and precision. The local fault prediction process is presented, and the fault deterioration trend is judged on the basis of dynamic weighted method. Actual example of Beijing Yanshan Petrochemical Co. shows the correction of conclusion. © 2010 Crown.

关键词： Information fusion

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Free-tagging methods for opinion analysis of online news comments

Free-tagging methods for opinion analysis of online news com...

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2010 8th IEEE International Conference on control and Automation, ICCA 2010

作者： Zhao, Changwei Liu, Heng Peng, Qinke Yang, Ying State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an China School of Electronic and Information Engineering Henan University of Science and Technology Luoyang China National key Laboratory of Electromechanical Engineerning and Control Xi'an Institute of Electrical and Information Technology Xi'an China

ISBN: (纸本)9781424451951

To overcome challenges of processing timeliness and changeful topics when analyzing opinions of online news comments, free-tagging methods including two steps, object identification and polarity analysis, are proposed in this paper. In the first step, from news text, we employ the Affinity Propagation Cluster (APC) to extract key sentences whose name entities will be identified and their specified types will be identified as comment objects. After identifying comment objects, the method of distance-weight count of polarized words and semantic rules are used to determine the polarity of comments. Our method does not require labeled corpus, therefore it can reduce artificial workloads and avoid problems of non-versatility caused by changeful topics of comments. Experiment results show that our method is capable of identifying objects and polarity of online news comments with higher precision and wide coverage rate, and can satisfy the requirements of online news comments analysis. © 2010 IEEE.

关键词： Semantics

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Single Sensor Information Fusion for Local Fault Prediction of Large Rotating Machinery

Single Sensor Information Fusion for Local Fault Prediction ...

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International Conference on Electrical and control Engineering (ICECE)

作者： Sun Jianghong Zuo Yunbo Xu Xiaoli School of ElectroMechanical Engineering Beijing Information Science and Technology University Beijing China School of Mechanical & Vehicular Engineering Beijing Institute of Technology Beijing China Beijing Key Laboratory Measurement and Control of Mechanical and Electrical System Beijing China

关键词： Machinery Feature extraction Fault diagnosis Vibrations Accuracy Turbines Monitoring

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Analysis on Energy Consumption and Optimal Operation of FGD System in Power Plant

Analysis on Energy Consumption and Optimal Operation of FGD ...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Gang Xu Yongping Yang Nan Wang Xing Yuan Ji Li Xiaona Song Key Laboratory of Condition Monitoring and Control of Power Plant Equipment of Ministry of Education School of Energy and Power Engineering North China Electric Power University Beijing China Electromechanical Practice Center Beijing Information Science and Technology University Beijing China

ISBN: (纸本)9781424448128;9781424448135

This paper analyzed the energy consumption characteristics of typical limestone-gypsum wet flue gas desulfurization (FGD) system which is widely used in power plant for SO x removal, and discussed its optimal operation. In the FGD system, booster fan; circulating slurry pump and oxidation fan are three major energy consuming devices. We established the mathematical models to disclose the relationship between the energy consumption and the desulfurization features of these equipments. On this basis, we obtained the performance curve of these equipments and proposed the optimal operation ways of the FGD system. The promising results obtained here provide a new approach for desulfurization with low energy consumption.

关键词： Energy consumption Power generation Flue gases Slurries Oxidation Blades Absorption Boilers Power system modeling Condition monitoring

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New Environmental Friendly Evaluation Criterion for Coal-Fired Power Plant Comprehensive Performance

New Environmental Friendly Evaluation Criterion for Coal-Fir...

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International Conference on Electrical and control Engineering (ICECE)

作者： Gang Xu Shiyuan Lu Yongping Yang Liqiang Duan Ji Li Le Li Xiaona Song Key Lab of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education North China Electric Power University Beijing China Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education National Engineering Laboratory for Biomass Power Generation Equipment School of Energy and Power Engineering North China Electric Power University Beijing China Electromechanical Practice Center Beijing Information Science and Technology University Beijing China

This paper proposes a new environmental friendly evaluation criterion to assess the comprehensive performance of coal-fired power plant. The new evaluation criterion, which is called the comprehensive Index of Energy, Resources and Environment (I ERE ), can synthetically evaluate the thermal, economical and environmental performance of power plants. Based on the new criterion, the paper analyzes the comprehensive performances of four typical 600MW coal fired power plants, discloses the relation regulation between power plant comprehensive performance criterion I ERE and key independent design variables, and analyzes the main factors influencing the comprehensive performance of power plant. These achievements will provide a new idea and criterion for multi-objective comprehensive evaluation and design parameters optimization of coal-fired power plants.

关键词： Power generation Water pollution Discharges Indexes Water resources Thermal pollution Fuels

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Error analysis of multi-legged walking robots based on forward kinematics

Error analysis of multi-legged walking robots based on forwa...

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IEEE International Conference on Robotics and Biomimetics

作者： Liangwen Wang Xuedong Chen Qingjiu Huang Xinjie Wang Ping Guo Department of Electromechanical Science and Engineering Zhengzhou University of Light Industry Zhengzhou Henan P.R. China Department of Mechanical and Control Engineering Tokyo Institute of Technology Meguroku Tokyo Japan State Key Laboratory of Digital Manufacturing Equipment and technology Huazhong University of Science and Technology Wuhan Hubei P.R. China

ISBN: (纸本)9781424417612;1424417619

Determining precisely the motion of robot body is of great significance to the location and control of mobile robots. If the positions of each foothold and the driven joint variables are inaccurate, actual posture of the robot is likely to deviate from requirement. In this paper, based on the forward kinematics of a multi-legged walking robot, the posture accuracy of the robot is discussed in terms of errors of foothold positions and independent driven joint variables of the robot. The position errors of the dependent joints are firstly derived from the constraint equations which descript the kinematic relation between independent and dependent joints. The error of orientation matrix of the robot is then calculated. Finally, the position error of Center-of-Gravity of the robot is obtained on the base of the above calculation. The analysis process is verified through a numerical example.

关键词： Legged locomotion Error analysis Robot kinematics Leg Manufacturing Mobile robots Error correction Motor drives Biomimetics Laboratories

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TRACKING control IN THE PRESENCE OF NONLINEAR dynamic FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

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Research on Restraining Low Frequency Oscillation with Flywheel Energy Storage System

Research on Restraining Low Frequency Oscillation with Flywh...

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International Conference on Power System technology (POWERCON)

作者： Yun Zhong Jiancheng Zhang Gengyin Li Zhiyuan Chen School of Information Engineering University of Nanchang Baoding Jiangxi China Department of Electrical power Engineering North China Electric Power University Baoding Hebei China Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Baoding Hebei China Baoding Zhongli Power Science and Technology Development Company Limited Baoding Hebei China

Low frequency oscillations in the interconnected power systems are observed all around the world. Besides conventional PSS to suppress Low frequency oscillation, there are other modern FACTS devices to damp oscillation, among which flywheel energy storage system (FESS) is a comparative valid way. The theory on restraining low frequency oscillation used by flywheel energy storage system is described through transfer function diagram and complex torque coefficient. A numerical model of flywheel energy storage asynchronous motor controlled by VVVF inverter is derived from its mathematical model in alpha-beta coordinate system. Then the total model eigenvalue is analyzed. Based on analysis, attach control strategy using two parallel independent parts for active power control and reactive power control is designed in FESS to restrain low frequency oscillation. The calculation result shows that flywheel energy storage system is an effective way to restrain low frequency oscillation and enhance power system dynamic performance.

关键词： Frequency Flywheels Energy storage Power system interconnection Transfer functions Torque Numerical models Inverters Mathematical model Power system modeling

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Iterative prony method based power system low frequency oscillation mode analysis and PSS design

Iterative prony method based power system low frequency osci...

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2005 IEEE/PES Transmission and DistributionConference and Exhibition - Asia and Pacific

作者： Hu, Guoqiang He, Renmu Yang, Huachun Wang, Peng Ma, Rui Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Ministry of Education Beijing China Changsha University of Science Technology

ISBN: (纸本)0780391144

This paper presents an identification method based on the iterative Prony to identify transfer function and configure PSS parameters using residue way. The iterative Prony is a very useful method to acquire power system oscillation modes, by which the system eigenvalue, oscillation frequency, amplitude, damping and relative phase can be directly estimated using the response of given input signals. Considering the influence of input signal on output signal, the iterative Prony can acquire the transfer function of power system, then, according to the corresponding residues we conducted coordinated setting of power system stabilizer (PSS) by residue method. The simulation results for two testing system examples prove that this proposal method is effective in the power system oscillation mode analysis and parameters determination of PSS, can improve eigenvalues of system and can enhance system damping after PSSs whose parameters are optimized by above method are built into power system. © 2005 IEEE.

关键词： Standby power systems

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Environmental/economic transaction planning using multiobjective particle swarm optimization and non-stationary multi- Stage assignment penalty function

Environmental/economic transaction planning using multiobjec...

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2005 IEEE/PES Transmission and Distribution Conference and Exhibition: Asia and Pacific

作者： Ma, Rui Wang, Peng Yang, Huachun Hu, Guoqiang Changsha Science and Technology University Changsha China Key Laboratory of Power System Protection and Dynamic Securty Monitoring and Control Ministry of Education Beijing China

ISBN: (纸本)0780391144

This paper presents a new approach for Environmental/Economic transaction planning model of the electricity market. The Environmental/Economic transaction planning problem is formulated as a multi-objective optimal power flow (MOPF) problem. A novel algorithm using multiobjective Particle Swarm Optimization (MOPSO) and non-stationary multi-stage assignment penalty function is proposed to solve this problem. PSO is modified by using dynamic neighborhood strategy, new particle memory updating, and one-dimension optimization to deal with multiple objectives. Incorporating of non-stationary multi-stage assignment penalty function in solving OPF problem can improve the convergence. The proposed method is demonstrated on the IEEE 30-bus system. The results show that the proposed approach can efficiently gain multiple pareto optimal transaction planning that match with the sustainable development strategy. © 2000 IEEE.

关键词： Strategic planning

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