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检索条件"机构=School of Automation Science and Control Engineering"

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Active Disturbance Rejection control simulation toolbox in open-source software Scilab/Xcos

Active Disturbance Rejection Control simulation toolbox in o...

引用

IEEE International Workshop on Open-source Software for Scientific Computation (OSSC)

作者： Lijun Wang Qing Li Chaonan Tong Yixin Yin Jiangyun Li Siyang Song School of Automation & Electrical Engineering Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education University of Science and Technology Beijing(USTB) Beijing China Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781612844923

To satisfy high accuracy and speed requirement, a kind of Active Disturbance Rejection control (ADRC) solution is proposed according to the complexity of Monitor Finishing Automatic Width control (FAWC) system with large time-delay for hot strip mill. In order to improve the versatility of ADRC parameters, a unit gain was added in the loop. Based on the simplified model, the presented ADRC consists of linear functions which make it easier to realize. For applying ADRC algorithms conveniently and widely, the control system is implemented in Scilab/Xcos, which is one of an Open-source Software for Scientific Computation (OSSC) and is free of charge. According to the program of data exchanging between Xocs and Scilab, Xcos simulation can be carried out in batch processing in Scilab. The disturbances rejection and robustness of the proposed control method is verified by ADRC simulation toolbox in Scilab/Xcos.

关键词： Strips Monitoring Educational institutions Uncertainty Steel control systems Temperature measurement

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A Energy Balanced Deployment for Linear Wireless Sensor Networks

A Energy Balanced Deployment for Linear Wireless Sensor Netw...

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2011 International Conference on Computer science and Network Technology(2011计算机科学与网络技术国际会议 ICCSNT 2011)

作者： Zhengjie Wang Xiaoguang Zhao Xu Qian College of Information and Electrical Engineering Shandong University of Science and Technology Qi State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese School of Mechanical Electronic & Info. Engineering China University of Mining & Technology (Beijin

ISBN: (纸本)9781457715860

Linear wireless sensor networks are characterized by a linear topology and multihop forwarding patterns. Sensors closer to the base station are usually required to forward a large amount of traffic for sensors farther from the base station, leading to the environment cannot be effectively monitored. The energy consumption balance is achieved in the paper by adjusting the distance between nodes. The distance of nodes near the base station become short because they have to forward the more traffic. The node deployment is converted to optimization problems of distance distribution between nodes. The network lifetime under different number of forwarding region is discussed. Simulation results show that this deployment strategy obtains the energy consumption balance.

关键词： wireless sensor networks optimal communication distance energy consumption balance distance optimal

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Multiobjective fault detection observer design for a class of T-S fuzzy nonlinear systems

Multiobjective fault detection observer design for a class o...

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International Symposium on Advanced control of Industrial Processes (ADCONIP)

作者： Dengfeng Zhang Xiaodong Han Hong Wang Zhiquan Wang Control Systems Centre University of Manchester Institute of Science and Technology Manchester UK School of Mechanical Engineering Nanjing University of Science and Technology of PLA Nanjing China Institute of Telecommunication Satellite China Academy of Space Technology Beijing China School of Automation Nanjing University of Science and Technology of PLA Nanjing China

This article presents the design of fault detection fuzzy observer with multiple performance constraints for a class of nonlinear system with Takagi-Sugeno fuzzy form. The multiobjective optimization and consistency analysis are applied to meeting the desirable transient behavior, steady output variance and H- index performance requirements. Thus, the rapidity of response to fault detection, robustness to noisy disturbances and sensitivity to faults are guaranteed simultaneously. One advantage of our design is that the determination of detection threshold makes full use of the information in the stage of observer design. Meanwhile, the multiple fuzzy Lyapunov function and the slack of variables are used for decreasing the conservatism of conventional single Lyapunove function method. Simulation results indicated the effectiveness of the proposed method.

关键词： Observers Fault detection Covariance matrix Indexes Eigenvalues and eigenfunctions Noise measurement Lyapunov methods

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Study on the BeiHang Keystroke Dynamics Database

Study on the BeiHang Keystroke Dynamics Database

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IEEE International Joint Conference on Biometrics (IJCB)

作者： Yilin Li Baochang Zhang Yao Cao Sanqiang Zhao Yongsheng Gao Jianzhuang Liu Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University Beijing China IllS Griffith University Brisbane Australia Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Chinese University of Hong Kong China

ISBN: (纸本)9781457713583

This paper introduces a new BeiHang (BH) Keystroke Dynamics Database for testing and evaluation of biometric approaches. Different from the existing keystroke dynamics researches which solely rely on laboratory experiments, the developed database is collected from a real commercialized system and thus is more comprehensive and more faithful to human behavior. Moreover, our database comes with ready-to-use benchmark results of three keystroke dynamics methods, Nearest Neighbor classifier, Gaussian Model and One-Class Support Vector Machine. Both the database and benchmark results are open to the public and provide a significant experimental platform for international researchers in the keystroke dynamics area.

关键词： Vectors Training Educational institutions

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IEC61850-based information modeling of 126KV intelligent terminals

IEC61850-based information modeling of 126KV intelligent ter...

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International Conference on Advanced Power System automation and Protection (APAP)

作者： Shu-jian Zhang Bin Wang Ming Sun Xin-zhou Dong Tong Sun Run-bin Cao Electrical engineering and automation Hefei University of Technology Baohe District 230009 China State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China School of Automation Nanjing University of Science and Technology Jiangsu 210094 China

The stability and reliability of the intelligent terminal's receiving information affects its control of intelligent switch in operation directly. To achieve reliable intelligent communications terminals, with techniques and methods of IEC61850 modeling, the paper completed the 126KVGIS intelligent terminal information model based on the analysis of its information characteristics, and established the hardware platform with data model and logical nodes provided by IEC61850. Thus it has a certain practical significance to promote the standard construction, operation and management of intelligent substation, and lead the digital process of process layer devices.

关键词： Object oriented modeling Switching circuits Circuit breakers Data models Unified modeling language Analytical models

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A motion-information-based vision-tracking system with a stereo camera on mobile robots

A motion-information-based vision-tracking system with a ste...

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IEEE Conference on Robotics, automation and Mechatronics

作者： Wook Bahn Jaehong Park Chang-hun Lee Tae-il Kim Teajae Lee Muhammad Muneeb Shaikh Kwang-soo Kim Dong-il Cho Automation and Systems Research Institute (ASRI) and School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea Department of Control and Instrumentation Engineering Hanbat National University Daejeon South Korea ASRI/Inter-university Semiconductor Research Center (ISRC) and School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea

This paper presents a vision-tracking system for a mobile robot, using robot motion and stereo vision data. The mobile robot has an actuator module which pans and tilts an integrated stereo camera. The proposed system controls the actuator to maintain the line of sight of the stereo camera towards a stationary target by using the robot motion data. The robot motion data are obtained from a gyroscope and encoders of the mobile robot. The stereo vision data from the camera is used to compensate for errors in the motion measurements, and to prevent a long term error accumulation. This vision-based compensation is used only when the robot stops or moves slowly, because the long vision processing times can cause the loop time to overrun. The proposed system is experimentally evaluated while the robot moves on a trajectory.

关键词： Cameras Mobile robots Robot vision systems Robot kinematics Vectors Stereo vision

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New method about how to construct decision tree based on association rule

New method about how to construct decision tree based on ass...

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IEEE International Workshop on Open-source Software for Scientific Computation (OSSC)

作者： Jing Gao Baoyong Zhao Information College Capital University of Economics and Business Beijing China School of Automation & Electrical Engineering University of Science and Technology Beijing Beijing China Key Laboratory of Advanced Control for Iron and Steel Process Ministry of Education China

ISBN: (纸本)9781612844923

Nowadays, decision tree is widely used as one of the most powerful tools in data mining. However, to construct an optimization decision tree is a complete NP problem. So a new method about how to construct decision tree, which is based on association rule mining, is proposed in this paper. Firstly, approximate exact rule with high reliability is defined. Secondly new attributes are generated from the approximate exact rule. And then its evaluation method is discussed in detail. Thirdly, the decision tree is constructed with both the new generated attributes and its original data. Finally, after comprehensive analysis, experimental results show that this new method has higher accuracy than any other old method.

关键词： Association rules Decision trees Approximation algorithms Classification algorithms Itemsets Accuracy

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Hybrid Position, Posture, Force and Moment control with Impedance Characteristics for Robot Manipulators

Hybrid Position, Posture, Force and Moment Control with Impe...

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2011 IEEE International Conference Mechatronics and automation(2011 IEEE机电一体化与自动化国际会议)

作者： Yu Yao Qingjiu Huang Yan Peng Taishi Oiwa Institute of Robotic Science and Engineering Nanjing University of Technology 5 Xinmofan Rd Nanjing Institute of Robotic Science and Engineering Nanjing University of Technology 5 Xinmofan Rd Nanjing School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China Department of Mechanical and Control Engineering Tokyo Institute of Technology 2-12-1-13-11 Ookayama

There are more and more needs for surface contact works, such as polish, grinding, paint, inspection, etc., with robot manipulators in recent years. In this paper, to achieve high-speed and high-precision surface contact work by robot manipulator, we propose a separation method of posture components to solve the problem of the rotation order, and a method of introducing the impedance characteristics to hybrid position, posture, force and moment control to eliminate the interference between free space and constrained space. Furthermore, the effectiveness of our control method for surface contact work was verified by the dynamic simulation of charactererasing motion on the white board of 6-DOF robot manipulator.

关键词： 6-DOF robot manipulator hybrid control impedance characteristics surface contact work dynamic modeling

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A discrete event-triggered communication scheme for networked T-S fuzzy systems

A discrete event-triggered communication scheme for networke...

引用

Annual Conference of Industrial Electronics Society

作者： Chen Peng Qing-Long Han Dong Yue School of Electrical and Automation Engineering Nanjing Normal University Nanjing Jiangsu China Centre of Intelligent and Networked Systems Central Queensland University Rockhampton QLD Australia Centre of Intelligent and Networked Systems School of Information and Communication Technology Central Queensland University Rockhampton QLD Australia Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

This paper presents a discrete event-triggered communication scheme for a class of networked Takagi-Sugeno (T-S) fuzzy systems. This scheme has two main features: i) whether or not the sampled state should be transmitted is determined by the current sampled state and the error between the current sampled state and the latest transmitted state, and ii) it is a discrete event-triggered communication scheme since the triggered conditions are measured and checked at the discrete sampling instant. Next, an asynchronous networked T-S fuzzy model is delicately constructed, which not only includes the state error, but also considers the non-uniform time scales in the networked T-S fuzzy model and the parallel distributed compensation fuzzy control rules. Then, using the Lyapunov-Krasovskii functional techniques, two sufficient conditions are derived for system analysis and synthesis, respectively. In particular, the derived stabilization criterion can provide a tradeoff to balance the required communication resources and the desired performance. Finally, a numerical example is given to show the effectiveness of the proposed method.

关键词： Fuzzy systems Current measurement Delay Educational institutions control systems Stability analysis Measurement uncertainty

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Invertibility of power systems components based-on nonlinear differential-algebraic-equation subsystems model

Invertibility of power systems components based-on nonlinear...

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作者： Zang, Qiang Zhou, Ying Zhang, Kaifeng Dai, Xianzhong School of Information and Control Engineering Nanjing University of Information Science and Technology Nanjing 210044 China College of Automation Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Laboratory of Measurement and Control of CSE Southeast University Ministry of Education Nanjing 210096 China

ISBN: (纸本)9789881725592

Components of power systems are essentially a special class of nonlinear differential-algebraic equations subsystems, whose index is one and interconnection is local measurable. In this paper, the invertibility of power systems components is discussed. Firstly, the definition of invertibility is presented. Secondly, a recursive algorithm is proposed to judge whether the controlled components are invertable. Then a physically feasible right inverse controller is constructed with which the controlled components are made linearization and decoupled. Finally, an excitation controller is designed for one synchronous generator within multi-machine power systems based on the proposed method in this paper. © 2011 Chinese Assoc of Automati.

关键词： Algebra

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