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2010 49th IEEE Conference on Decision and control

作者： Patrick Gerland Dominic Gross Horst Schulte Andreas Kroll Institute of Measurement and Control Dept. of Mechanical Engineering University of Kassel (Germany) Institute of Control and System Theory Dept. of Electrical Engineering University of Kassel (Germany) Faculty of Electrical Engineering and Automation University of Applied Science Berlin (Germany)

ISBN: (纸本)9781424477456

In this paper an observer-based fault detection approach for a class of nonlinear systems, which can be modeled by Takagi-Sugeno (TS) fuzzy models, is presented. We propose a sliding mode fuzzy observer that deals with unmeasurable premise variables, bounded uncertainties in the plant and allows fault estimation based on an equivalent output error injection approach. Necessary conditions for the existence of the robust observer are derived from sliding mode theory [10]. Stability is ensured by linear matrix inequality (LMI) based sufficient conditions. An illustrative example demonstrates the effectiveness of the proposed scheme.

关键词： sliding mode observer Sliding mode disturbance Fuzzy systems Defect detection transport stream actuators fuzzy observer

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Friction feedforward compensation and position feedforward in CNC machines

Friction feedforward compensation and position feedforward i...

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7th Annual International Conference on electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2010

作者： Suteeratanapirom, Wijin Rattanawaorahirankul, Rapeepong Laosapan, Chutima Sanposh, Peerayot Chayopitak, Nattapon Tungpimolrut, Kanokvate Kunieda, Hiroaki TAIST Tokyo Tech ICTES Program Department of Electrical Engineering Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Intelligent Mechatronics Automation Robotics and Control Laboratory Department of Electrical Engineering Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center 112 Thailand Science Park Phahonyothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand Department of Electrical and Electronic Engineering Tokyo Institute of Technology S3-65 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan

ISBN: (纸本)9789746724913

This research proposes a method to eliminate friction effect and reduced tracking error on CNC milling machines. A CNC milling machine has many connected mechanical components which have friction effects such as ball screws and rails. To control servo motors which are used to drive X-Y table in CNC milling machine, the conventional PID controller is widely used. In this research, Panasonic motor driver is set to the torque control mode. To compensate the friction effects, the friction feedforward compensation method is proposed. Moreover, to reduce the position tracking error, position feedforward controller is used. The simulation and implementation of position control in one axis of PID with Friction Feedforward Compensation and Position Feedforward controller (FFC-PFC) are presented.

关键词： Friction

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Artificial Neural Networks Eccentricity Fault Detection of Induction Motor

Artificial Neural Networks Eccentricity Fault Detection of I...

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International Multi-Conference on Computing in the Global Information Technology, ICCGI

作者： Dragan Matić Filip Kulić Manuel Pineda-Sanchez Joan Pons-Llinares Department for Automation and System Control Faculty of Technical Science Novi Sad Serbia Department of Electrical Engineering Universidad Politécnica de Valencia Valencia Spain

This paper deals with eccentricity fault detection in a induction motor via artificial neural networks. Discriminative features are extracted from magnitude-frequency plot of line current spectra at characteristic frequencies. Based on this data, training and test sets for used artificial neural networks are made. Feedforward and radial basis function neural networks are used for tasks of rotor condition classification. Well trained artificial neural networks are capable to successfully classify rotor condition at medium and full shaft load for choosen features. Simple structure and implementation made them suitably for practical usage.

关键词： Induction motors Rotors Artificial neural networks Stators Training Helium Harmonic analysis

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Analysis of Windup in Brushless DC Motor Speed Regulating system and its control

Analysis of Windup in Brushless DC Motor Speed Regulating Sy...

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The 8th World Congress on Intelligent control and automation(第八届智能控制与自动化世界大会 WCICA 2010)

作者： Zhaoxia Xiao Hongwei Fang School of Electrical Engineering and Automation　Tianjin Polytechnic University Tianjin 300160 Chin Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Ti

The windup phenomenon caused by the current limitation and PWM voltage regulation in the brushless DC motor (BLDCM) double PI loop speed regulating system has been investigated. And the anti-windup controller has been applied to suppress the relevant windup phenomenon. The simulation illustrates that the anti-windup controller make the BLDCM speed regulating less overshoot and quickly dynamic response. And it also has the same anti-disturb performance while the BLDCM running with external load disturb and/or internal resistor, inductance and inertia variation. The results have good reference for the design of BLDCM and the performance enhancement of the BLDCM speed regulating system.

关键词： Stators Windup Torque Resistance Brushless DC motors Inductance Simulation

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Artificial neural networks broken rotor bars induction motor fault detection

Artificial neural networks broken rotor bars induction motor...

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Seminar on Neural Network Applications in electrical engineering

作者： Dragan Matić Filip Kulić Vincente Climente-Alarcón Ruben Puche-Panadero Faculty of Technical Science Department for Automation and System Control Trg Dositeja Obradovica 6 NoviSad Serbia Faculty of Technical Science cDepartment for Automation and System Control Trg Dositeja Obradovica 6 Novi Sad Serbia Department of Electrical Engineering Comino de Vera Polytechnic University of Valencia Valencia Spain

Paper deals with application of online rotor broken bar fault detection via artificial neural networks. Fault can be detected by monitoring abnormalities of the spectrum amplitudes at certain frequencies in the motor current spectrum. These discriminative features are used for training of feed-forward backpropagation artificial neural network. Trained network is capable to successfully classify induction motor rotor condition. Results are presented in tables and figures.

关键词： Rotors Induction motors Artificial neural networks Bars Amplitude modulation Fault detection Classification algorithms

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Impacts of motor load on the transient stability of the MicroGrid

Impacts of motor load on the transient stability of the Micr...

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World Congress on Intelligent control and automation (WCICA)

作者： Zhaoxia Xiao Hongwei Fang School of Electrical Engineering and Automation Tianjin Professional University Tianjin China Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University TJU Tianjin China

Transient stability of a MicroGrid in which the micro sources using the peer-to-peer and master-slave control was investigated. The P-f and Q-V droop control was used for micro sources 1 and 2. And the PQ control was used for micro source 3. The impacts of motor load on the transient stability of the MicroGrid were shown when the motor load starts, load power changes and a three-phase faults happens. And the power sharing between each micro sources and the main frequency supporting are achieved. Simulation results have verified the effectiveness of the proposed control strategy.

关键词： Stability analysis Power system stability Transient analysis automation Inverters Distributed power generation

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Internal model control for hysteretic nonlinear systems based on support vector regression

Internal model control for hysteretic nonlinear systems base...

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World Congress on Intelligent control and automation (WCICA)

作者： Wenguang Zhang Jianqin Mao Yanhua Ma Beijing Key Laboratory of Measurement and Control Technology and System for Industrial Process Control & Computer Engineering School North China Electric Power University Beijing China School of Automation Science and Electrical Engineering Beijing Aeronautics and Astronautics University Beijing China

Aim at the hysteretic nonlinearity characteristic of the giant magnetostrictive actuator in control, an internal model control method based on support vector regression is presented in this paper. Its models are built by support vector regression using the input and output data of the actuator and the internal model control is achieved. The simulation results show the method in this paper has better control precision.

关键词： Support vector machines Actuators automation Data models Computational modeling Hysteresis Magnetostriction

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Embedding obstacle avoidance in the control of a flexible multi-robot formation

Embedding obstacle avoidance in the control of a flexible mu...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： V. T. L. Rampinelli A. S. Brandão M. Sarcinelli-Filho F. N. Martinsy R. Carelliz Graduate Program on Electrical Engineering Federal University of Espírito Santo Vitória ES Brazil Department of Automation and Control Engineering Centro Leste College Serra ES Brazil Universidad Nacional de San Juan San Juan AR

This work proposes a way to make a group of mobile robots which are navigating as a formation to avoid obstacles in their paths. A trajectory tracking controller is proposed to guide the robots during the navigation, to which an obstacle deviation subsystem is added. Such subsystem is implemented in each robot in the formation, whereas the proposed controller is applicable to subsets of three robots. The obstacle deviation is based on virtual forces, which are considered to change the velocities of the individual robots. A proof of the stability of the control system implemented with the proposed controller, including control signal saturation to avoid the saturation of the actuators, is presented, based on the theory of Lyapunov. Simulated and experimental results are also presented, which validate the proposal.

关键词： Robot kinematics Robot sensing systems Collision avoidance Shape Navigation Trajectory

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Flow-rate Characteristics Measurement of Regulators Based on the Pressure Response in an Isothermal Tank

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Chinese Journal of Mechanical engineering 2009年第5期22卷 633-638页

作者： FAN Wei ZHANG Hongli WANG Tao PENG Guangzheng ONEYAMA Naotake Education Ministry Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Beijing 100081 China School of Automation Beijing Institute of Technology Beijing 100081 China Electrical Engineering College Xinjiang University Urumchi 830046 China SMC Tsukuba Technical Center Ibaraki-ken 300-2493 Japan

Regulators are important components in pneumatic system, and their flow-rate characteristics are the key parameters for designers. According to the correlatively international standard and national standard of China, which describe the flow-rate characteristics measurement method of pneumatic regulators, the pressure and the flow are measured point by point, and then the flow-rate characteristics curve is plotted point to point. This method has some disadvantages, such as equipment complexity, much air consumption, and low efficiency. To settle the problems presented above, this paper puts forward a new high efficient and energy saving flow-rate characteristics measurement method of regulators, which is based on the pressure response when charging and discharging to an isothermal tank without any flow meters. The measurement principle, the system and the steps are introduced. And the tracking differentiator is used for the data processing of the pressure difference. Two typical kinds of regulators were experimentally investigated, and their flow-rate characteristics curves were obtained with the new and the conventional method, respectively. Comparatively, it＇s proved that this new method is feasible because it is not only able to meet the demand of the measurement precision, but also to save energy and improve efficiency. Compared to the conventional method, the new method takes only about 1/10 amount of time and consumes about only 1/30 amount of air. Hopefully it will be able to serve as an international standard of flow-rate characteristics measurement method of regulators.

关键词： regulator flow-rate characteristics isothermal tank charging and discharging once pressure response tracking differentiator energy saving and high efficiency

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Novel connection scheme of backup power supply adaptive to Distribution Line Non-Communication Protection and new criterion for high voltage and large capacity induction motor

Novel connection scheme of backup power supply adaptive to D...

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2009 Asia-Pacific Power and Energy engineering Conference, APPEEC 2009

作者： Liu, Kun Dong, Xinzhou Bo, Zhiqian State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China AREVA T and D Automation Stafford ST17 4LX United Kingdom

ISBN: (纸本)9781424424870

This paper presents a new practical backup power supply connection scheme for Distribution Line Non-Communication Protection (DNCP). Simulation tests have been conducted using the Alternate Transient program (ATP) with respect to a typical single circuit breaker multi-section system. The results prove that the new scheme is able to not only recover the power supply of loads on healthy lines automatically, but also create disturbances in favor of Accelerated Over Current (AOC) criterion. Aiming at the failure of Directional Under Voltage (DUV) criterion derived from high voltage and large capacity induction motor load, a novel criterion using the increment of reactive power is proposed. © 2009 IEEE.

关键词： Induction motors

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