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SICE Annual Conference

作者： A. Kanbolat Y. Okuyama F. Takemori L. Gianone S. Horvat J. Bokor Department of Information and Knowledge Engineering Facult of Engineering Tottori University Japan Tottori Daigaku Tottori JP Dept. of Inf. & Knowledge Eng. Tottori Univ. Japan Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Hungary Department of Transpoi-talion Engineering Technical University of Budapest Hungary

This paper deals with simultaneous control of acceleration transmission, wheel load fluctuation, suspension deflection and sprung mass displacement. The control theory is based on the robust H/sub /spl infin// control theory with the consideration of the modeling errors lumped into an unstructured uncertainty acting on the unperturbed plant. The design method is new and powerful for electronic car suspension's control systems, as it presents a new approach to the designers for the computation of a controller maintaining robust stability while guaranteeing the performance in a wide frequency range, even in the case of the controller is applied to the actual plant. Additionally, the paper emphasizes that the assumptions in the modeling step may lead to unrealistic control designs and, as an example, the effect of the rigidity assumption on the behavior of the open loop system is discussed.

关键词： control systems control theory Open loop systems Displacement control Weight control Acceleration Wheels Fluctuations Robust control Power system modeling

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Performance evaluation of multi-carrier transmission over measured indoor radio propagation channels

Performance evaluation of multi-carrier transmission over me...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： H. Nikookar R. Prasad Dept. of Electr. Eng. Delft Univ. of Technol. Netherlands International Research Center for Telecommunications-Transmission and Radar (IRCTR) & Telecommunications and Traffic Control Systems Group Department of Electrical Engineering Delft University of Technnology Delft Netherlands

The multi-carrier (MC) technique is attractive in indoor radio communication systems. It combats frequency selectivity of the channel as well as providing spectral efficiency. In this paper performance of the multi-carrier system with BPSK modulation is evaluated over the empirical data base of 12000 impulse response estimates of indoor radio propagation channels at two dissimilar office buildings. These indoor channels have lognormal amplitude fading and modified Poisson distribution of arrival time of multipath components. Performance is evaluated in terms of the average probability of bit error as a function of signal-to-noise ratio. The influence of changing the number of tones as well as the guard interval on the average bit error rate is investigated. Degradation of the performance caused by carrier phase error is studied. Results can be used in the design and assessment of indoor wireless communication systems.

关键词： Indoor radio communication Fading Degradation Personal communication networks Indoor communication OFDM modulation Digital communication Analytical models Rayleigh channels Performance analysis

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Assembly as a noncooperative game of its pieces: the case of endogeneous disk assemblies

Assembly as a noncooperative game of its pieces: the case of...

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IEEE International Symposium on Assembly and Manufacturing (ISAM)

作者： H.I. Bozma C.S. Karagoz D.E. Koditschek Dept. of Electr. & Electron. Eng. Bogazici Univ. Istanbul Turkey Department of Electrical and Electronic Engineering Boğaziçi University Istanbul Turkey Artificial Intelligence Laboratory and Control Systems Laboratory EECS Department College of Engineering University of Michigan Ann Arbor MI USA

We propose an event-driven approach to planning and control of robot assembly problems using ideas from noncooperative game theory. We report on the results of an extensive simulation study for a very simple two degre... 详细信息

关键词： Computer aided software engineering Robotic assembly Robotics and automation Orbital robotics Robot sensing systems Assembly systems Laboratories control systems Actuators Feedback

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Steady‐state security evaluation of electrical power systems by means of artificial neural network

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European Transactions on Electrical Power 1995年第2期5卷 91-97页

作者： Chiodo, E. Menniti, D. Testa, A. Picardi, C. Elio Chiodo (1959) received the degree in Electronics Engineering in 1985 and the Ph.D. degree in Computational Statistics both from the University of Naplefltaly. He is a Researcher at the Department of Electrical Engineering of the University of Naples and a member of the Italian Statistical Society. His areas of interest include probabilistic methods applied to electric power systems analysis. (University of Naples Fedrrico 11. Electrical Engineering Dept.via Claudio 21 1-80125 Naplefltaly T +3981/7683226 Fax+3981/2396897) Daniele Menniti (1958) received the degree in Electrical Engineering from the University of Calabria. Cosenzataly and the Ph.D. degree in Electrical Engineering from the University of NapleslItaly in 1984 and 1989 respectively. He is a researcher at the Electronic. Computer and Systems Science Department of the University of Calabria. Italy. Hiscurrent research interests concern electric power system analysis real-time control and automation. (University of Calabria Electronic Computer and Systems Science Dep. Arcavacataji Rende (CS). 1-87036 CosenzdItaly T +39984/494707. Fax +39984/4947 13) Alfredo Testa (1950) received the degree in Electrical Engineering from the University of Naples/Italy in 1975. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. He is engaged in researches on electrical power systems reliability and harmonic analysis. (University of Naples Federico 11. Electrical Engineering Dep. via Claudio '2 1 1-80 I25 NapleslItaly T + 39 8 I/7 68 3'2 11. Fax+3981/2396897) Ciro Picardi (1949) received the degree in Electronics Engineering from the University of Naples/Italy in 1975. He is currently Associate Professor in Process Control at the Department of Electronic Computer and System Science of the University of Calabria. Italy. His current research interests are in the area of electrical drives robotics neural networks and fuzzy control. (University of Calabria Electronic. Compu

An artificial‐neural‐network (ANN) application for steady‐state security evaluation of electrical power systems is presented. Such application is based upon a combined use of a multilayer back‐propagation neural network and of an opportune electrical system model, previously proposed by some of the authors. In the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the ANN utilized is described with particular reference to the solutions adopted by the authors. Afterwards, some remarks on the system model utilized are reported. Finally, numerical applications on the AEP‐14 bus system are presented and the results obtained with different ANN configurations are analyzed. Copyright © 1995 John Wiley & Sons, Ltd.

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BENDING BEHAVIOR OF POLY (VINYL ALCOHOL) POLY (ACRYLIC-ACID) HYDROGEL ROD INCLUDING ELECTRODES AND ITS APPLICATION

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KAGAKU KOGAKU RONBUNSHU 1994年第5期20卷 625-630页

作者： MORI, Y TOKURA, H YOSHIKAWA, M Tokyo Institute of Technology Department of Mechanical Engineering Tokyo Inst. of Tech. Dept. of Control and Systems Engineering

Square-rod shaped poly (vinyl alcohol) hydrogel containing poly (acrylic acid) with two platinum wire electrodes in its body was prepared and its characteristics were examined. Upon application of direct current to the electrodes in NaOH aqueous solution, the gel bent due to shrinkage of the gel around the anode. At this time, the bending rate and deflection were dependent on both the applied Voltage and the concentration of NaOHaq. Reversing the polarity, the hydrogel which had bent showed stretching. The gel was able to repeat the cycle of bending and stretching as the polarity was alternated. This hydrogel with electrodes has a simpler structure than does the bimetal system, Strong and flexible hydrogels can be obtained by a simple process of freezing-thawing a mixture of two kinds of poly-aqueous solutions, without any chemical reaction. Therefore, bending and stretching behavior is considered to be of wide application and was applied to a gripper system. It had the ability to continue gripping material in air as well as in NaOHaq.

关键词： HYDROGEL INCLUDING ELECTRODES POLY (VINYL ALCOHOL) HYDROGEL IONIC GEL BENDING BEHAVIOR GRIPPER

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Using laplace transforms to compute performance of mobile radio links 5

Using laplace transforms to compute performance of mobile ra...

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5th IEEE Intemational Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 1994

作者： Diesta, Rolando F. Linnartz, Jean-Paul M.G. Dept. of Electrical Engineering and Computer Sciences Cory Hall University of California BerkeleyCA94720 United States Telecommunications and Traffic Control Systems Delft University of Technology Et. 19.26 P.O.B.5031 Delft2600 GA Netherlands

ISBN: (纸本)9051991932

This paper reviews progress in developing a mathematical framework to evaluate the performance of mobile radio links. It takes into account multi-ray multipath fading with Rician or Nakagami probability density, lognormal shadowing and path loss of wanted and interfering transmitters, Additive White Gaussian, man-made burst noise and discontinuous transmission. The method presented here uses Lapiace Transforms of the pdf of the power of each interfering signal. This method is computationally efficient and allows inclusion of a wide range of link aspects. We also show that, in contrast to common belief, it is not realistic to approximate the Rician fading of the wanted signal by a Nakagami model. New results are given for micro-cells along highways. © IEEE.

关键词： Radio links

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Monitoring and Fault Detection for an HVAC control System

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IFAC Proceedings Volumes 1994年第2期27卷 535-540页

作者： Paul S. Fasolo Dale E. Seborg Bechtel Corporation Control Systems 50 Beale St. San Francisco CA University of California Santa Barbara Dept. of Chemical Engineering Santa Barbara CA

A controller performance index developed by Desborough and Harris (1992) is proposed as a fault detection technique for the on-line monitoring of feedback control systems. An important theoretical advantage of this approach is that the performance index can distinguish between process variability due to external sources (e.g. load or setpoint changes) and variability due to a significant change in the feedback loop. The feasibility of the new approach is demonstrated via a simulation study for an air duct heating coil.

关键词： Fault detection controller performance process control estimation

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A Quick Identification Method of Continuous-Time Nonlinear systems and Its Application to Power Plant control

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IFAC Proceedings Volumes 1994年第8期27卷 283-288页

作者： K. Inoue K. Kumamaru Y. Nakahashi H. Nakamura M. Uchida Dept. of Control Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka 820 Fukuoka Japan Bailey Japan Co. Ltd. Nirayama 410-21 Shizuoka Japan

In this paper, a quick identification method based on the short time record of input-output data is introduced for joint state and parameter estimation of nonlinear continuous-time systems. The method can then be used for on-line monitoring the system with unknown parameters. An application way of the method to main-steam temperature control of a thermal power plant are developed in the framework of model reference adaptive control system (MRACS). Simulation studies on a super-heater model have been carried out to demonstrate the effectiveness of the proposed method.

关键词： Nonlinear system parameter estimation simulator system identification model reference adaptive control thermal power plant steam temperature control

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Interpolation and numerical differentiation for observer design

Interpolation and numerical differentiation for observer des...

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American control Conference (ACC)

作者： S. Diop J.W. Grizzle P.E. Moraal A. Stefanopoulou The Control Systems Laboratory of the Dept. Elect. Eng. and Comp. Sci. U. of Michigan Control Systems Laboratory Department of Electrical Engineering and Computer Science University of Michigan AnnArbor MI

This paper explores interpolation and numerical differentiation as a basis for constructing a new approach to the design of nonlinear observers.

关键词： Interpolation control systems Observers Sampling methods Laboratories Equations Observability State estimation Sampled data systems Numerical analysis

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Exothermic heat estimation using fuzzy neural nets for a batch reactor temperature control system

Exothermic heat estimation using fuzzy neural nets for a bat...

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IEE Colloquium on Advances in Neural Networks for control and systems

作者： E.S. Cubliar J.L. Coronado C.G. Moreno J. Manuel C. Izquierdo Dept. de Ingenieria de Sistemas y Autom. Valladolid Univ. Spain Department of Systems Engineering and Control School of Industrial Engineering University of Valladolid Valladolid Spain

Batch processes may constantly be changing, sometimes in unpredictable ways. For this reason, the operators need to keep a close watch on things. Batch-plant control stations have traditionally been located very close to the process, because operators can do a better job of sensing abnormalities if they can see, hear and smell what is going on. The reaction process can be considered as unstable, the instability being understood as the characteristic making the self abandoned system evolve towards unpermitted temperature values with the associated danger of accidents. The temperature also plays a decisive role in the final product quality, each time the reactor changes from the desired temperature the quality diminishes, the appearance of undesired species increases, and the overall performance of the reaction decreases which directly affects the economic performance.< >

关键词： Chemical industry Fuzzy neural networks Stability Temperature control

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