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Close-Loop System Identification Using Over-sampling Scheme and Its Estimate Accuracy Analysis

Journal of Shanghai University(English Edition) 2005年第5期9卷 437-444页

作者：胡怀中孙连明刘文江 Faculty of Automation and Control Xi'an Jiaotong University Xi'an 710049 P. R. China Department of Electrical Engineering Keio University Yokohama Japan

A new identification method for a linear discrete-time closed-loop system is proposed based on an output over-sampling scheme. When the system outputs are over-sampled the new output sequences would contain more information about the plant structure. Using general least squares method （GLS） the plant over-sampled model should be recognized. Then the original plant model should be obtained by its relationship with the over-sampled model. Compared with conventional approaches the advantage of the new method is that even if the ordinary identifiability conditions are not satisfied, a close-loop system can be identified by using the oversampled output without utilizing any external test signal. Accuracy analysis shows the relationship between the estimation error and the over-sampling rate. Numerical simulation illnstrates its effectiveness.

关键词： system identification close-loop over-sampling estimate accuracy.

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Femlab-based output regulation of nonhyperbolically nonminimum phase system and its real-time implementation

Femlab-based output regulation of nonhyperbolically nonminim...

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作者： Rehák, Branislav Orozco-Mora, Jorge Čelikovský, Sergej Ruiz-León, Javier Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Technická 2 166 27 Praha 6 Czech Republic CINVESTAV-IPN Unidad Guadalajara Plaza la Luna 44550 Guadalajara Jalisco Mexico Institute of Information Theory and Automation Academy of Sciences of the Czech Republic P.O. Box 18 182 08 Prague Czech Republic

ISBN: (纸本)008045108X

The aim of this paper is twofold. It provides another option how to obtain a universal easily implementable method for the solution of the regulator equations using the FEMLAB package. The regulator equation originates from the output regulation problem. The main idea is making a slight change of the regulator equation. It is then solved using the finite-element method. Some theoretical aspects concerning solvability of the equations and convergence to the original problem are introduced. Secondly, to demonstrate viability of our approach, the results were applied to the real-time control of a gyroscope. Both simulations and real-time laboratory experiments are included. Copyright © 2005 IFAC.

关键词： Gyroscopes

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PREDICTIVE control OF A PROCESS WITH VARIABLE DEAD-TIME

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IFAC Proceedings Volumes 2005年第1期38卷 309-314页

作者： Smaranda Cristea César de Prada Robin de Keyser Department of Systems Engineering and Automatic Control Faculty of Sciences c/ Real de Burgos s/n University of Valladolid Spain fax: +34 983 423161 tel: +34 983 423164 Department of Control Engineering & Automation University of Ghent Technologiepark-Zwijnaarde 9 B-9052 GHENT Belgium

This paper deals with the control of variable-delay processes, where the delay depends on the value of the manipulated variable, which results in a non-linear system difficult to control. As a reference process, the case of a heated tank where the controlled variable is the liquid temperature and the placement of the sensor introduce a transport delay in the control loop, has been considered. This challenging problem is approached from the perspective of predictive control, using the non-linear EPSAC controller.

关键词： Variable dead-time Predictive control Nonlinear control Delay systems

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engineering METHODS OF control DESIGN FOR DISTRIBUTED PARAMETER SYSTEMS

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IFAC Proceedings Volumes 2005年第1期38卷 159-164页

作者： G. Hulkó C. Belavý Ŝ. Cibiri J. Szuda University Center for Control of Distributed Parameter Systems Department of Automation and Measurement Faculty of Mechanical Engineering Slovak University of Technology Nám. Slobody 17 812 31 Bratislava Slovak Republic

In the paper engineering methods for control of distributed parameter systems given by numerical structures on complex shape 3D definition domains are presented. controlled systems are interpreted as lumped-input/distributed-output systems. Schemes of distributed parameter control loops are arranged. A web-based control design environment from *** will be introduced: Distributed Parameter Systems Blockset for MATLAB & Simulink – third-party MathWorks product, web service and internet monograph. – In general the paper indicates a new direction for engineering control technology, operating mainly on the time axis, to expand towards time/space coordinates of real world.

关键词： control design distributed parameter systems lumped-input/distributed-output systems time/space decomposition of dynamics and control synthesis distributed parameter PID algebraic state space robust control web based control design environment finite element method

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WEB-BASED control DESIGN ENVIRONMENT FOR DISTRIBUTED PARAMETER SYSTEMS control EDUCATION

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IFAC Proceedings Volumes 2005年第1期38卷 25-30页

In the paper a web-based control design environment for distributed parameter systems control education is presented. It is arranged on *** and includes: full downloadable demo version of Distributed Parameter Systems Blockset for MATLAB & Simulink with Show, Demos and DPS Wizard –third-party Math Works product; web Service for support control solutions via internet and internet monograph Modeling, control and Design of Distributed Parameter Systems with Demonstrations in MATLAB. Some possibilities of this environment are indicated by control of complex shape 3D metal body heating – modeled by numerical structures of finite element method.

关键词： control education internet distributed parameter systems lumped-input/distributed-output systems time/space decomposition of dynamics and control synthesis distributed parameter PID algebraic state space robust control web based control design environment finite element method

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Web-Based MATHEMATICA Platform for Systems and controls Education

Web-Based MATHEMATICA Platform for Systems and Controls Educ...

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IEEE International Symposium on Intelligent control (ISIC)

作者： P. Kujan M. Hromcik M. Sebek Institute of Information Theory and Automation Centre for Applied Cybernetics Praque Czech Republic Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Institute of Information Theory and Automation AS CR Praque Czech Republic

Computer algebra software tools in general, and the MATHEMATICA system in particular, are increasingly employed during the controls and systems graduate and undergraduate courses at FEE CTU in Prague. MATHEMATICA benefits from its high-level user interface, graphical abilities, as well as numerical and symbolic computational power and dedicated packages for control systems analysts and design (control systems professional and advanced numerical methods). In addition, MATHEMATICA provides a Web-based platform for publication of results and presenting user-callable routines (webMATHEMATICA). In the Czech Republic a project financed by the Ministry of Education and called PUMA (power user mathematic array) has been started recently, focused on creation of Web-accessible software tools to support education at technical universities. The authors have been involved in these efforts and would like to contribute by creating a Web site based on webMATHEMATICA dedicated to numerical and symbolic computations for systems and controls. This paper is the first report on this topic. The work is in rapid progress now and the paper summarizes the authors' plans and first results

关键词： control systems Software tools Computer science education Algebra User interfaces Computer interfaces Packaging control system analysis Mathematics Educational institutions

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ROBUST ADAPTIVE control OF TRANSVERSE FLUX PERMANENT MAGNET MACHINES USING NEURAL NETWORKS

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IFAC Proceedings Volumes 2005年第1期38卷 169-174页

作者： A Babazadeh H.R. Karimi N Parspour Institute of Electrical Drives Power Electronics and Devices University of Bremen Bremen Germany Control and Intelligent Processing Center of Excellence Dept. of Electrical and Computer Engineering Faculty of Engineering University of Tehran Tehran Iran DAAD Scholarship Holder at the Institute of Automation University of Bremen Germany

This paper deals with modelling and adaptive output tracking of a Transverse Flux Permanent Magnet Machine (TFPM) as a non-linear system with unknown nonlinearities by utilizing High Gain Observer (HGO) and Radial Basis Function (RBF) networks. The technique of feedback linearization and H ∞ control are used to design an adaptive control law for compensating the unknown nonlinearity parts, such the effect of cogging torque, as a disturbance is decreased onto the rotor angle and angular velocity tracking performances. Finally, the capability of the proposed method is shown in the simulation results.

关键词： High gain observer transverse flux permanent magnet machine H ∞ control RBF neural network output tracking

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Unknown Input Detection Using Receding Horizon Approach

Unknown Input Detection Using Receding Horizon Approach

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IEEE International Symposium on Intelligent control (ISIC)

作者： B. Kulcsar J. Bokor Department of Transport Automation Faculty of Transportation Engineering Budapest University슠of슠Technology슠and슠Economics Budapest Hungary System and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

The paper offers the possibility of the design of unknown input detection for dynamic systems under external noise effect. The presented geometric based fundamental problem in residual generation (FPRG) method uses on the one hand the Kalman filtering and on the other hand the moving horizon estimation (MHE) when stochastic noise on the input and on the output, with additive failure directions, are presents. The paper combines the optimal Kalman and MHE method with geometric based unknown input observer strategy. The MHE solution makes to treat constraints during the estimation process possible. A numerical example supports the necessity of constrained unknown input estimation

关键词： Fault detection State estimation control systems Kalman filters Space technology Additive noise automation Stability Predictive models Predictive control

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Growth of thallium overlayers on a Si(100) surface

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Physical Review B 2005年第3期71卷 035312-035312页

作者： A. A. Saranin A. V. Zotov V. G. Kotlyar I. A. Kuyanov T. V. Kasyanova A. Nishida M. Kishida Y. Murata H. Okado M. Katayama K. Oura Department of Electronic Engineering Faculty of Engineering Osaka University Suita Osaka 565 Japan Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia Research Center for Ultra-High Voltage Electron Microscopy Osaka University Ibaraki Osaka 567-0047 Japan

Formation of the thallium (Tl) overlayers on the Si(100)2×1 surface has been studied using scanning tunneling microscopy (STM) and first-principles total-energy calculations. It has been found that adsorption of Tl atom involves a charge transfer leading to the development of a static dipole which is responsible for the field-assisted migration of the Tl adsorbate on the surface. When the STM tip bias voltage is positive, Tl atoms are repelled out from the region underneath the tip apex. In the case of the negative bias voltage, Tl is accumulated underneath the tip. Four principal ordered Tl∕Si(100) reconstructions have been found, namely, three 2×2−Tl reconstructions with 0.25, 0.50, and 0.75 ML of Tl and 2×1−Tl reconstruction with 1.0 ML of Tl. The possible atomic arrangement of these reconstructions has been evaluated using first-principles total-energy calculations.

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Non-linear Predictive control for a Distillation Column

Non-linear Predictive Control for a Distillation Column

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IEEE Conference on Decision and control

作者： A. Rueda S. Cristea C. de Prada R. De Keyser Department of Systems Engineering and Automatic Control Faculty of Sciences c/Real de Burgos sln University of Valladolid Spain EeSA-Department of Electrical Energy Systems and Automation Ghent University Gent Belgium

ISBN: (纸本)0780395670

In this paper an alternative approach to non-linear predictive control is presented. It is based on iterative linearisation of the model response so that the same closed loop responses as in the pure non-linear approach are obtained but with reduced computation times and more efficient optimisation tools. The method is applied to a high purity distillation column and some results are presented showing the behaviour of the proposed algorithm.

关键词： Predictive control Distillation equipment Iterative methods Industrial control Constraint optimization Iterative algorithms Electrical equipment industry Sampling methods Quadratic programming Pressure control

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