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

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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New research advancement in electrical engineering field of China-Reviews on special issue of Science in China Series E:Technological Sciences

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Chinese Science Bulletin 2009年第8期54卷 1285-1286页

作者： MEI ShengWei MA Jin State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing 100084 China Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control of Ministry of Education North China Electric Power University Beijing 102206 China

Based on,but not limited to the research results of electrical engineering published in the special issue of Science in China Series E,June 2008,this essay gives a brief review on a wide range of state-of-art advancement in electrical engineering field of China,which includes power system modeling,analysis and control,risk assessments in power system,etc.

关键词：电气工程工程领域技术科学电力系统研究成果中国科学系统建模风险评估

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Mean-square exponential stability of stochastic Markovian jump systems with mode-dependent time-varying delays

Mean-square exponential stability of stochastic Markovian ju...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Li Ma Fei-Peng Da Kan-Jian Zhang Key Laboratory of Measurement and Control for Complex Systems of Engineering Ministry of EducationSoutheast University

In this paper,the mean-square exponential stability problem is investigated for stochastic Markovian jump open-loop systems with mode-dependent time-varying *** constructing a modified Lyapunov-Krasovskii functional,a delay-dependent sufficient condition for the solvability of the above problem is presented in terms of linear matrix inequalities（LMIs）.The decay rate can be a given finite positive constant and synchronously the derivative of time-varying delays is only required to have a upper bound which is not required to be less than *** examples are presented to illustrate the effectiveness of the theoretical result.

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A Novel Method of Feature Points Identification Using Multi-Scale Technology

A Novel Method of Feature Points Identification Using Multi-...

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Chinese Conference on Pattern Recognition (CCPR)

作者： Shaoyan Gai Feipeng Da Weiguang Yang Key Laboratory of Measurement and Control for Complex System of Ministry of Education South-East University Nanjing China

High precision identification of feature points is an important technology and one of the bases of computer vision, image analysis and image processing. In the practical applications, the feature points can not be identified easily in various conditions of light illumination, visual angle, texture, and perspective projection. And in many cases, the size of feature point is small, the context is uncertain and the shape of feature point is different from each other. According to the properties of actual vision images, a novel method of feature point identification using multi-scale detecting technology is presented. In this thesis, an automatic circle feature point detection system is developed based on digital image processing techniques, in which, the feature points are detected in two scales. In large-scale recognition, the image pre-processing is carried out to reduce the impact of image noise, and the feature points with various shape deformation can be found out. And then, the founded points are checked along with small scale detecting. The relationship of the points and their mappings in three dimensional space is obtained and used to judge if the point is a real feature point one by one. Thus the deformed feature points in various perspective projection conditions can be recognized correctly. Experimental results show that this approach for feature points identification is not only fast but also robust. The proposed technology is a kind of useful method for contour extraction and feature points identification in the fields of computer vision and image analysis.

关键词： Computer vision Image texture analysis Shape Image processing Application software Lighting Digital images Large-scale systems Image recognition Noise reduction

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The application of the data mining based on adaptive immune algorithm for power transformer fault diagnosis

The application of the data mining based on adaptive immune ...

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2009 International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC '09

作者： Jikeng, Lin Congmin, Wu Dongtao, Wang Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Tianjin China Tianjin Engineering Normal College Tianjin China

ISBN: (纸本)9781424452187

Adaptive Immune Algorithm based data mining (AIA-Data Mining) is presented for fault diagnosis of power transformer. The information entropy is used for the production of the initial population, which leads to convergence speed of the algorithm to be faster than that of the initial population produced by random. On the basis of that, the bi-level search Mechanism of the AIA further speeds up extraction of the decision-making table for the transformer fault diagnosis from the samples. Results from examples show that the method proposed is effective and feasible. © 2009 IEEE.

关键词： Data mining

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Modified Particle Filter for Object Tracking in Low Frame Rate Video

Modified Particle Filter for Object Tracking in Low Frame Ra...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Tao Zhang Shumin Fei Hong Lu Xiaodong Li the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationInstitute of AutomationSoutheast University the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Institute of AutomationSoutheast University School of Automation Nanjing Institute of Technology

Object tracking algorithm using modified Particle filter in low frame rate(LFR) video is proposed in this paper,which the object moving significantly and randomly between consecutive frames in the low frame rate ***,Particle filtering use motion transitions to model the movement of the ***,in object tracking with low frame rate sequences,it is very difficult to model significant random jumps of *** key notion of our solution is that using the object detection and extraction to locate the tracked object,while not using the dynamical *** propagate the sample set around the detected regions,which the samples are assumed to be uniformly distributed in the neighborhoods of the detected *** is similar to the general particle filter to propagate *** we compute the likelihood between the target model and the candidate regions,which are based on color histogram *** extensive experiments show that the proposed algorithm performs robustly in a large variety of tracking scenarios.

关键词： frame filter Modified Particle Filter for Object Tracking in Low Frame Rate Video Object Filter

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Dynamical simulation of laboratory Microgrid

Dynamical simulation of laboratory Microgrid

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

作者： Zhao, Yishu Guo, Li Department of Electrical Engineering Shandong Electric Power Research Institute Jinan China Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Tianjin China

ISBN: (纸本)9781424424870

A MicroGrid can increase the reliability of energy supplies by disconnecting from the grid in the case of network faults or reduced power quality. The techniques that have been investigated to control MicroGrids in both modes are summarized as well as those proposed to maintain stability during the transitions from one mode to the other. This paper first introduces the MicroGrid planning structure in Shandong Electric Power Research Institute (SEPRI) and discusses the various feasible control approaches used and presents for MicroGrid. Then, based on modeling different types of distributed generations and energy storage equipment, the SEPRI MicroGrid model was simulated with several operating modes under peer to peer control strategy. The importance of an energy storage to assist stability during transition between the operating modes is emphasized. © 2009 IEEE.

关键词： Energy storage

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Scene specified control for internet-based mobile robot operation

Scene specified control for internet-based mobile robot oper...

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IEEE International Conference on Mechatronics and Automation

作者： Xudong Ma Xianzhong Dai Fang Fang Ningting Cheng Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation South East University Nanjing China

A networked mobile robot in large networks such as Internet often operates under supervisory control and the discrete commands and decisions from the remote operators normally depend on the feedback scene information. Therefore it must be tolerate of the significant and unpredicted time latency that might mislead the robot for time and scene-dependent operations. A series of strategies are presented in this paper to decrease the latency impact and implement scene specified control of a Internet-based mobile robot. Time stamps are attached to each communication packet of scene video, audio and environment information from the robot to remote operator's computer for display, which then sends back control decision or command of the right time stamps with the scene when needed. By allocating a memory buffer for current display and recent status even including video frames the robot recalls the environment with the event time stamps as searching index, which helps to estimate the exact robot position or operation. Reverse position and motion are conducted according to estimation from the memorized information. The strategies have been introduced to improve a practical networked mobile robot control platform with experiment validity given in detail.

关键词： Layout Internet Mobile robots Computer displays Delay Communication system control Auditory displays IP networks Supervisory control Feedback

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Based on particle swarm optimization and simulated annealing combined algorithm for reactive power optimization

Based on particle swarm optimization and simulated annealing...

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

作者： Wang, Zhenshu Li, Linchuan Li, Bo School of Electrical Engineering Shandong University Jinan China Key Laboratory of Power System Simulation and Control of Ministry of Education Tianjin University Tianjin China Shandong Electric Power Engineering Consulting Institute Jinan China

ISBN: (纸本)9781424424870

This paper presents a novel combined algorithm based on particle swarm optimization (PSO) and simulated annealing algorithm(SA) for power system reactive optimization. According to the characteristics of PSO and SA, the proposed method which combined PSO and SA efficiently makes good use of easily implementing performance and fast convergence performance of PSO and global convergence performance of SA, and makes them search in phase. This paper detailed explains coding of control variables, selecting of parameters and material steps of combined algorithm for optimizing reactive power. Taking the IEEE 14-bus system, IEEE 57-bus system and IEEE 118-bus system for example, the simulation results demonstrate that the proposed method is simple and easy to implement, and has high computing efficiency and comparing with conventional PSO it can obtain higher quality solutions. © 2009 IEEE.

关键词： Simulated annealing

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Optimal guaranteed cost control for an uncertain discrete T-S fuzzy system with time-delay

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控制理论与应用（英文版） 2009年第2期7卷 144-150页

作者： Renming WANG Thierry Marie GUERRA Juntao PAN College of Electrical Engineering and Information Technology Three Gorges University Yichang Hubei 443002 China LAMIH UMR CNRS Universite de Valenciennes et du Hainaut-Canbresis Le Mont Houy Valenciennes Cedex France Key Laboratory of Measurement and Control of CSE of Ministry of Education Southeast University Nanjing Jiangsu 210096 China

This paper considers the guaranteed cost control problem for a class of uncertain discrete T-S fuzzy systems with time delay and a given quadratic cost function. Sufficient conditions for the existence of such controllers are derived based on the linear matrix inequalities （LMI） approach by constructing a specific nonquadratic Lyapunov-Krasovskii functional and a nonlinear PDC-like control law. A convex optimization problem is also formulated to select the optimal guaranteed cost controller that minimizes the upper bound of the closed-loop cost function. Finally, numerical examples are presented to demonstrate the effectiveness of the proposed approaches.

关键词： Fuzzy system Time delay Linear matrix inequalities （LMI） Guaranteed cost control

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