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European control Conference (ECC)

作者： M. Gálvez-Carrillo R. De Keyser C. Ionescu Department of Control Engineering and System Analysis Universite Libre de Bruxelles Brussels Belgium EeSA - department of Electrical energy Systems and Automation Ghent University Gent Belgium

This work presents the comparison between the results obtained from applying three different control strategies for regulating the temperature in a distributed solar collector (DSC) field. A nonlinear predictive control strategy, the Nonlinear Extended Prediction Self-Adaptive control (Nonlinear EPSAC or NEPSAC), is compared with a linear predictive controller and a PI controller. All control strategies include a Smith Predictor and use a model of the process for the tuning of the controllers. Simulations on a model based on physical and geometric properties of the solar field are performed and controllers are validated on real data measurements.

关键词： Mathematical model Computational modeling Predictive models Feedforward neural networks Optical filters Tuning Solar radiation

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Synthesis and photocatalytic capability of Cr-TiO2 film

Synthesis and photocatalytic capability of Cr-TiO2 film

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International Nano-Optoelectronic Workshop, iNOW

作者： Xiaojuan, Lu Duowang, Fan Duojin, Fan Hongzhong, Liu School of Automation and Electric Engineering Lanzhou Jiaotong University Lanzhou 730070 China MOE Key Lab. of Opto-electronic Technology and Intelligence Controll Lanzhou Jiaotong University Lanzhou 730070 China Lanzhou Dachen Automatic Control System Co. Ltd. Lanzhou 730070 China State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 China

A TiO2 catalyst doped by Cr was prepared by the sol-gel method and characterized by UV-2550 and FS. The results revealed that the Cr 6+-doped TiO2 film had the higher photocatalytic activity than pure TiO2 film. ©... 详细信息

ISBN: (纸本)1424415918

关键词： Sol-gel process

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NEURAL-ADAPTIVE control BASED ON ADALINE NEURONS WITH APPLICATION TO A POWER system

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IFAC Proceedings Volumes 2007年第18期40卷 457-464页

作者： Ioan Filip Octavian Prostean Florin Dragan Cristian Vasar Department of Control System Engineering “Politehnica” University from Timisoara Faculty of Automation and Computer Science 300223 Timisoara Romania Phone: (+40) 0256-403238 E-Mail: ioan.filip@aut.upt.ro

A neural-adaptive control solution is exposed in this paper. The control strategy is based on the linear adaptive neuron, which is called ADALINE. Unlike other neural control solutions, based on perceptrons neurons characterized by a long time learning process and a difficult on-line tuning of weights, this approach uses a fast algorithm, which adapts on-line the neuron's weights. Therefore the non-linear character of control law is induced by the permanent changes of neuron weights, which are variable parameters of controller. A set of study cases is done, with application to the excitation control of a synchronous generator.

关键词： adaptive control neural networks ADALINE modelling simulation synchronous generator

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SHORT TERM ELECTRIC LOAD FORECAST WITH ARTIFICIAL NEURAL NETWORKS

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IFAC Proceedings Volumes 2007年第18期40卷 443-449页

作者： Vasar Cristian Szeidert Iosif Filip Ioan Prostean Gabriela Department of Control System Engineering “Politehnica” University from Timisoara Faculty of Automation and Computer Science 300223 Timisoara Romania Phone: (+40) 256-403237 E-Mail: cristian.vasar@aut.upt.ro

This paper presents issues regarding short term electric load forecasting using feedforward and Elman recurrent neural networks. The study cases were developed using measured data representing electrical energy consume from Banat area. There were considered 35 different types of structure for both feedforward and recurrent network cases. For each type of neural network structure were performed many trainings and best solution was selected. The issue of forecasting the load on short term is essential in the effective energetic consume management in an open market environment.

关键词： neural networks prediction problems load forecasting feedforward networks simulation

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ML DESIGNERTM as simulation tool in robotics

ML DESIGNERTM as simulation tool in robotics

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International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： Mario Schulz Ivan Velickovic Sasa Andelkovic Volker Zerbe Goran S. Dordevic Computer Science and Automation Faculty System and Control Theory Department Technical University Ilmenau Ilmenau Germany Faculty of Electronics engineering Robotics Lab University of Nis Nis Serbia

Robots are complex systems that require multidisciplinary approach to development. Hence, both research and production of a robotic system require a tool that would provide means for coordination between teams with different areas of expertise as well as the ability to integrate, simulate and debug the system in a comprehensive way. Also, with the growing popularity of service robotics, research and modeling of human-machine interaction gains the attention. From a simulation tool, it is expected to support the means for describing this interaction. For that purpose we are investigating the ML Designer TM , not just as a possible simulation tool, but also as a modeling and design paradigm. For verification purposes we will compare it against MATLAB Simulink TM . A pneumatic system will be modeled with both tools and a comparison will be performed.

关键词： Mathematical model Robot kinematics Cleaning system testing Power system modeling MATLAB Pneumatic systems control systems Level control Costs

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Delay-dependent Guaranteed Cost control for Uncertain Nonlinear Discrete-time systems

Delay-dependent Guaranteed Cost Control for Uncertain Nonlin...

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IEEE International Conference on Mechatronics and automation

作者： Dongmei Yue Zhiyuan Liu Xiaodong Gai Run Pei Department of Control Science and Engineering Harbin Institute of Technology Heilongjiang China Department of Equipment System And Automation Dalian Naval Academy Liaoning China Department of Electrical Engineering Harbin Institute of Technology Heilongjiang China

The delay-dependent guaranteed cost control problem is studied for a class of uncertain nonlinear discrete systems with time-delay. A sufficient condition is presented for the existence of a memory state feedback and a parameterized representation of the control laws is given in terms of certain linear matrix inequalities (LMIs). The non-convex feasible problem is converted into convex optimization problem, and the design procedure of optimal control law is given.

关键词： Costs Nonlinear control systems control systems Delay systems Sufficient conditions State feedback Linear feedback control systems Linear matrix inequalities Design optimization Optimal control

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A Study On Iterative Learning control With Adjustment Of Learning Interval For Monotone Convergence In The Sense Of Sup-Norm

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Asian Journal of control 2008年第1期4卷

作者： Kwang-Hyun Park Zeungnam Bien Division of EE Department of EECS Korea Advanced Institute of Science and Technology 373–1 Kusong-dong Yusong-gu Taejon 305–701 Korea. Zeungname Bien:received the B.S. degree in electronics engineering from Seoul National University Seoul Korea in 1969 and the M.S. and Ph.D. degrees in electrical engineering from the University of Iowa Iowa City Iowa U.S.A. in 1972 and 1975 respectively. During 1976–1977 academic years he taught as assistant professor at the Department of Electrical Engineering University of Iowa. Then Dr. Bien joined Korea Advanced Institute of Science and Technology summer 1977 and is now Professor of Control Engineering at the Department of Electrical Engineering and Computer Science KAIST. Dr. Bien was the president of the Korea Fuzzy Logic and Intelligent Systems Society during 1990–1995 and also the general chair of IFSA World Congress 1993 and for FUZZ-IEEE99 respectively. He is currently co-Editor-in-Chief for International Journal of Fuzzy Systems (IJFS) Associate Editor for IEEE Transactions on Fuzzy Systems and a regional editor for the International Journal of Intelligent Automation and Soft Computing. He has been serving as Vice President for IFSA since 1997 and is now Chief Chairman of Institute of Electronics Engineers of Korea and Director of Humanfriendly Welfare Robot System Research Center. His current research interests include intelligent control methods with emphasis on fuzzy logic systems service robotics and rehabilitation engineering and large-scale industrial control systems. Kwang-Hyun Park:received the B.S. M.S. and Ph.D. degrees in electrical engineering and computer science from KAIST Korea in 1994 19997 and 2001 respectively. He is now a researcher at Human-friendly Welfare Robot System Research Center. His research interests include learning control machine learning human-friendly interfaces and service robotics.

It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of λ-norm is guaranteed. In this paper, a new ILC algorithm with adjustment of learning interval is proposed to resolve such an undesirable phenomenon, and it is shown that the output error can be monotonically converged to zero in the sense of sup-norm when the proposed ILC algorithm is applied. A numerical example is given to show the effectiveness of the proposed algorithm.

关键词： Iterative learning control monotone convergence learning interval sup-norm

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On end-to-end network clock offset compensation algorithm and its implementation

On end-to-end network clock offset compensation algorithm an...

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26th Chinese control Conference, CCC 2007

作者： Yunyi, Jia Bugong, Xu Shihua, Wang Buchun, Liu Lab. of Real-Time Control Through Internet and Fieldbuses College of Automation Science and Engineering South China Univ.of Technology Guangzhou 510640 China Lab. of Pattern Recognition and Intelligent System College of Information Engineering Beijing Univ. of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)7900719229

This paper addresses the problem of clock offset in end-to-end network time synchronization. Firstly, an algorithm for measuring the end-to-end clock offset is proposed. Secondly, the traditional linear-compensation method is analyzed and an algorithm to obtain the compensation line using least-squared algorithm is proposed. Finally, a new method of dynamic non-linear predicting compensation and its realization algorithm are proposed. Through experiments, it shows that the method of dynamic non-linear predicting compensation could compensate clock offset better than linear-compensation method. The superiority, validity and feasibility of the new method are proved.

关键词： Nonlinear systems

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Robust quadratic optimal control of uncertain TS-fuzzy-model-based dynamic systems

Robust quadratic optimal control of uncertain TS-fuzzy-model...

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IEEE International Conference on systems, Man and Cybernetics

作者： Wen-Hsien Ho Jinn-Tsong Tsai Tung-Kuan Liu Jyh-Horng Chou Department of Medical Information Management Kaohsiung Medical University Taiwan Department of Computer Science National Ping Tung University of Education Taiwan Department of Mechanical and Automation Engineering National Kaohsiung First University of Science and Technology Taiwan Institute of System Information and Control National Kaohsiung First University of Science and Technology Kaohsiung Taiwan

This paper considers the design problem of the robust quadratic-optimal parallel-distributed-compensation (PDC) controllers for the Takagi-Sugeno (TS) fuzzy-model- based control systems with both elemental parametric uncertainties and norm-bounded approximation error. An integrative method, which complementarily fuses the robust stabilizability condition, the orthogonal-functions approach (OFA) and the hybrid Taguchi-genetic algorithm (HTGA), is presented in this paper to design the robust quadratic-optimal PDC controllers, in which the robust stabilizability condition is proposed in terms of linear matrix inequalities (LMIs).

关键词： Robust control Optimal control Nonlinear control systems control systems Uncertainty Approximation error Fuzzy control Fuzzy systems Algorithm design and analysis Nonlinear dynamical systems

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Synthesis and Photocatalytic Capability of Cr- TiO2 film

Synthesis and Photocatalytic Capability of Cr- TiO2 film

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2007年纳米光电子学国际学术会议

作者： Xiaojuan Lu Duowang Fan Duojin Fan Hongzhong Liu School of Automation and Electric Engineering Lanzhou Jiaotong University Lanzhou 730070 People's MOE key lab of Opto-electronic Technology and Intelligence Controll Lanzhou Jiaotong University La Lanzhou Dachen Automatic Control System Co. Ltd Lanzhou 730070 and People's Republic of China State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong university Xi'an 710049

A TiO2 catalyst doped by Cr was prepared by the sol-gel method and characterized by UV-2550 and FS. The results reveal that the Cr6+-doped TiO2 film has the higher photocatalytic activity than pure TiO2 *** Semiconductor photocatalysts, mainly TiO2, have attracted much attention in last decade because of their potential application in the removal of many organic and inorganic pollutants in air or water. Many studies have been carried out on the application and modification of TiO2, and various photocatalytic reactors have been investigated according to respective application demands for the purification of air and water. In the water and wastewater treatment field, slurry reactor is the most common device because of its high specific surface area and good dispersion. However, the use of TiO2 slurry reactor is still limited mainly due to difficult separation of TiO2 particles from treated water. To overcome the problem, Titania beads, TiO2 based thin film, fiberglass loaded with titania, and encapsulated titania within a zeolite framework have been prepared and used in fixed bed. However, the activity of TiO2 photocatalyst is reduced to a considerable extent by these immobilization techniques because the effective surface area of photocatalysts is decreased considerably. The aim of this study is to obtain a magnetically separable photocatalyst, which is stable and easy to be prepared. In the work, Cr as magnetic cores was prepared by liquid catalytic phase transfer method at low temperature, and magnetically separable TiO2- Cr photocatalysts were synthesized. Their physicochemical properties and photocatalytic activity for degradation of methyl orange in water were investigated.

关键词： Chromium Water pollution Inductors Semiconductor films Wastewater treatment Slurries Magnetic separation Air pollution Purification Surface treatment

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