The purpose of the paper is to study the design of the active wheel suspension system. The goal of the control design is the disturbance attenuation with respect to the road disturbances when some of the physical para...
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The purpose of the paper is to study the design of the active wheel suspension system. The goal of the control design is the disturbance attenuation with respect to the road disturbances when some of the physical parameters of the system are uncertain. On the basis of a linear quarter-car model the tire stiffness and suspension stiffness are assummed to be uncertain. In this paper the authors deal with some new robust design methods. They examine the applicability of H ∞ control in case of the active suspension system using a quarter-car model. The problem is solved as a direct state-feedback H ∞ control problem and in case of structured uncertainties as an RLQR (Robust LQR) design task. On the basis of combination of these two methods new procedure is proposed.
This paper discusses the problem of modeling time varying system perturbations and its application to observer-based detection filter design in uncertain linear systems. Robustness issues with respect to structured ti...
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This paper discusses the problem of modeling time varying system perturbations and its application to observer-based detection filter design in uncertain linear systems. Robustness issues with respect to structured time varying system perturbations are considered. Our basic contribution is that applying differential algebraic methods and matrix lie-algebra in describing the effect of them varying system perturbation, it is possible to construct an extended linear time invariant(LTI) system and associated observer such that the solution of the design problem can be performed using algebraic methods and geometric concepts similar to the case of time invariant situations. At the same time the filter can be made robust with respect to these perturbations.
作者:
Djukanovic, M.B.Sobajic, D.J.Pao, Y.‐H.Miodrag B. Djukanovic (1959) received his B.S.
M.Sc. and Ph.D. degrees in Electrical Engineering from the University of Belgrade/Yugoslavia in 1982 1985 and 1992 respectively specializing in electric power systems. In 1984 he joined the Electrical Engineering Institute “Nikola Tesla” in Belgrade where he was working on the scientific studies in the field of power systems planning operation and control. In 1985 and 1990 he was appointed as a research scholar at the Royal Institute of Technology Stockholm and Case Western Reserve University Cleveland Ohio. His major in- terests are in the area of power system analysis steady-state and dynamic security and application of neural networks in electric power systems. (Electrical Engineering Institute “Nicola Tesla” ul. Koste Glavinica 8A YU-11000 Belgrad T +3811/2351-619 Fax + 3811/2351-823) Dejan J. Sobajic (1949) received the B.S.E.E. and the M.S.E.E. degrees from the University of Belgrade/Yugoslavia in 1972 and 1976
respectively and the Ph.D. degree from Case Western Reserve University Cleveland Ohio in 1988. At present he is with the Department of Electrical Engineering and Applied Physics Case Western Reserve University Cleveland. He is also the Engineering Manager of A1 WARE Inc. Cleveland. His current research interests include power system operation and control neuralnet systems and adaptive control. He is a member of the IEEE Task Force on Neural-Network Applications in Power Systems and of the IEEE Intelligent Controls Committee. He is the Chairman of the International Neural-Networks Society Special Interest Group on Power Engineering. (Case Western Reserve University Department of Electrial Engineering and Computer Sciences Glennan Building Ohio 44 106 USA T + 1216/421-2380 Fax +1216/368-8776) Yoh-Han Pao (1922) has been a Professor of Electrical Engineering and Computer Science at Case Westem Reserve University (CWRU)
Cleveland Ohio since 1967. He has served as chairman of the University's Electrical Engineering Department
The Transient Energy Function (TEF) method has been intensely investigated over the last decade as a reliable and accurate tool for transient stability assessment of multimachine power systems. In this paper we propos...
This paper is a presentation of the ongoing research project being under development at the institute of automation and control processes (Vladivostok, Russia). The main purpose of the project is to develop a prototyp...
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Limit properties of the QSIM algorithm with respect to the spurious behaviours have been analysed in this short paper, in the case of approximating landmark sets and non-qualitative right-hand side functions. It has b...
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Taking an industrial boiler as the controlled plant, the authors present a hierarchical intelligent control structure and algorithms for expert control, multimode control and self-tuning PID control. This hybrid contr...
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ISBN:
(纸本)0780305469
Taking an industrial boiler as the controlled plant, the authors present a hierarchical intelligent control structure and algorithms for expert control, multimode control and self-tuning PID control. This hybrid controller adjusts its structure to maintain good performance over a wide variation of plant operating conditions. The results of digital and hybrid simulation as well as industrial field testing show that a hierarchical scheme which adopts different control algorithms based on the extent of deviation, incremental deviation and working condition is feasible. It is shown that the control of an industrial coal-fired boiler is improved by the intelligent hybrid controller.< >
The J. Stefan institute in Ljubljana has developed a microcomputer-based multiloop controller MMC—90, which is, on the one hand, aimed at scientific research work, i.e. the study of the most modern techniques of cont...
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The J. Stefan institute in Ljubljana has developed a microcomputer-based multiloop controller MMC—90, which is, on the one hand, aimed at scientific research work, i.e. the study of the most modern techniques of control and, on the other hand, aimed at solving actual industrial problems. This paper presents an original CACE approach used for the design and implementation of a combustion controller with MMC-90. The control structure was first designed and simulated using the CACSD program package ANA. Then, it was implemented in the MMC-90 and tested in a real-time hardware—in—the—loop mode. This control simulation is described and shown for the case of a medium-size industrial boiler (20 MW). The combustion was simulated on a PC and the combustion control was done by the MMC—90. The developed combustion control concept was also tested and later applied in the real plant. The improved combustion control on the steam boiler PK400 (PK401) at the chemical works Cinkarna Celje implemented with MMC-90 led to a 4 % fuel (heavy oil) savings.
In batch pulp cooking the heating steam is used only in some phases of the technological procedure. This causes very irregular total steam consumption. High steam flow-rate variations impose a high dynamic load at the...
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In batch pulp cooking the heating steam is used only in some phases of the technological procedure. This causes very irregular total steam consumption. High steam flow-rate variations impose a high dynamic load at the steam generation plant which reduces the efficiency of the steam generation. In this contribution a system for steam consumption control is presented, which is based on the three multiloop microprocessorbased controllers. The implemented control structure consists of a set of temperature controllers, a set of “smooth”temperature set-point generators, a set of state-machine algorithms for sequential control, a steam distribution algorithm, a simple steam flow-rateestimation and a steam flow-rate controller. The control structure is simple enough to allow the implementation as a stand-alone small-size control system. The lowcost solution is provided also by elimination of the need for aseparate steam flow-rate measuring system for each digesterʼs heat exchanger. After the installation a reduction of 70% in steam flow-rate variance was measured. The reduction may be adjusted by the operator as a compromise between the acceptable dynamic loading of the steam boilerand the requested pulp production rate.
A few basic strong approximation results for fixed gain estimators are presented. Both off-line and on-line estimators are considered. The results are first presented for time-invariant systems. Once the appropriate t...
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A few basic strong approximation results for fixed gain estimators are presented. Both off-line and on-line estimators are considered. The results are first presented for time-invariant systems. Once the appropriate techniques and results are developed, the extension of the analysis to time-varying systems is quite easy.< >
The structural control properties of heat exchanger networks has been investigated from the viewpoint of network topology. While the structural stability is independent of topology, the structural controllability and ...
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The structural control properties of heat exchanger networks has been investigated from the viewpoint of network topology. While the structural stability is independent of topology, the structural controllability and observability strongly depend on topology features, like splitting and mixing connections. The dynamics of heat exchanger superstructure has been studied by numerical simulation and qualitative prediction: overshoot and inverse responses have been observed due to splitting and mixing connections
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