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2004 ifac workshop on generalized solutions in control problems, gscp 2004

作者： Brusov, V.S. Piyavsky, S.A. Tiumentsev, Yu.V. Russia Rzeshów Polytechnical Institute Rzeshów Poland Samara Architecture and Building Academy Russia

Almost all kinds of men's activities associated with design, manufacturing and maintenance of complex systems consist of two main classes of problems: a generation of decision alternative set allowed for situation studied and decision making, Le. choice of some decision alternative from the set of allowed ones. A role of various kind of uncertainties related to complex system design process is discussed founding on intelligent Bight control system design example. A mixed information technology is used to solve this problem basing on mathematical modeling, multi-purpose system methodology and artificial neural networks. This is very promising approach for a solving not only FCS gain scheduling problem, but another kinds of FCS synthesis problems. The approach promises also to ensure effective technical decision generation and making tool for problem solving with various kind of uncertainties involved. Copyright © ifac generalized solutions IN control problems. 2004.

关键词： Flight control systems

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ifac Proceedings Volumes (ifac-PapersOnline)

IFAC Proceedings Volumes (IFAC-PapersOnline)

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2004 ifac workshop on generalized solutions in control problems, gscp 2004

The proceedings contain 48 papers. The topics discussed include: a dynamic programming approach to the linear impulse control synthesis problem;optimal control for diffusion quasi linear processes with incomplete information about the state;on a problem of stochastic stabilization;optimal boundary string oscillations controls as functions minimizing the boundary energy integral;generalized determination of external influence vector parameters to control reliability of aerospace system parts;necessary optimality conditions for impulsive control problems;optimization of parameters in the second-order improving algorithms for optimal control problems;the experiences of application of second-order methods for solving optimal control problems;multimethod procedures in control improvement and optimal synthesis;and on one approach to solving the problem of optimal control on the basis of the method of perturbations.

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Necessary optimality conditions for impulsive control problems

Necessary optimality conditions for impulsive control proble...

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2004 ifac workshop on generalized solutions in control problems, gscp 2004

作者： Arutyunov, A. Dykhta, V. Karamzin, D. Pereira, F. Department of Differential Equations and FUnctional Analysis Peoples Friendship University of Russia Moscow Russia Department of Mathematics Baikal State University of Economy and Law lrkutsk Russia Department of Calculus Mathematics and Cybernetics Moscow State University Moscow Russia Department of Electrotechnical and Computer Engineering Faculdade de Engenharia Universidade Do Porto Porto Portugal

In this article, we present first and second order necessary conditions of optimality for impulsive control problems recently obtained by the authors. Two kind of results are discussed: first order necessary conditions of optimality for the free time optimal control problem with state and control constraints and second order necessary conditions for fixed time optimal control problems with state endpoint and control constraints. The main feature of these conditions is their nondegeneracy. A discussion of these results in the context of the state-of-the-art providing a historical perspective and insight for future perspectives is also included. Copyright © ifac generalized solutions IN control problems. 2004.

关键词： Maximum Principle Necessary Conditions of Optimality Nondegeneracy Optimal Impulsive control

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Asymptotic behavior of attainable sets of a linear impulse control system

Asymptotic behavior of attainable sets of a linear impulse c...

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2004 ifac workshop on generalized solutions in control problems, gscp 2004

作者： Goncharova, E.V. Ovseevich, A.I. Institute of System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences 134 Lermontov st. Irkutsk664033 Russia Institute of Problems in Mechanics Russian Academy of Sciences 101 vernadsky av. Moscow119526 Russia

We study the long term asymptotic behavior of attainable sets and their shapes of linear time-invariant impulse control systems. We give an exhaustive description of attractors arising and the related dynamics. The re... 详细信息

关键词： Linear control systems

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Regulated sliding mode control of satellite rotation

Regulated sliding mode control of satellite rotation

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2004 ifac workshop on generalized solutions in control problems, gscp 2004

作者： Moosavian, Ali A. Homaeinejad, M. Reza Department of Mechanical Engineering K.N .Toosi University of Technology P.O. Box 16765-3381 Tehran Iran

Development of space platforms, structures and satellites increasingly requires servicing, construction, and maintenance operations on orbit. In this paper, a regulated sliding mode control law is developed and applied to space assemblies during a rotational maneuver, which results in an improved performance compared to the conventional algorithm. Although the sliding mode controller usually results in an acceptable performance, but the chattering frequency is often high which may excite flexible dynamics of space systems. Besides, a chattering control demand may cause practical difficulties for actuators, particularly for the on-off type as is the case in space. In order to fulfill stability requirements, robustness properties and chattering elimination, a regulating routine is proposed to determine proper positive values for the coefficient of sliding condition. To this end, first the rotation dynamics of a typical satellite described in body coordinates is derived in terms of its angular velocity. Explicit relationship between actuator torques and satellite orientation is obtained using Euler quasi-coordinates. Next, focusing on the chattering phenomenon that is of main concern in space due to excitation of higher modes, a new approach is proposed to alleviate (ideally eliminate) the chattering trend. The developed control law is applied on a given satellite during a rotational maneuver, while parametric uncertainties and noisy feedback signals are taken into considerations. Also, it is assumed that only micro reaction jet actuators are available, which can generate a constant positive or negative (on-off) force. Therefore, the exact demanded torque can not be applied on the system. The simulation results show that the regulated sliding condition can significantly alleviate the chattering trend, which in turn make the on-off actuators properly follow the control demand. These results reveal the merits of the new regulated sliding mode control law. Copyright © IFA

关键词： Rotation

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Interconnection and damping assignment passivity-based control:: A survey

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EUROPEAN JOURNAL OF control 2004年第5期10卷 432-450页

作者： Ortega, R García-Canseco, E Signaux & Syst Lab F-91192 Gif Sur Yvette France

Interconnection and damping assignment passivity-based control is a technique that regulates the behavior of nonlinear systems assigning a desired (port-controlled Hamiltonian) structure to the closed-loop. Since the introduction of this controller design methodology five years ago, many theoretical extensions and practical applications have been reported in the literature. The theoretical developments include some variations and shortcuts that are useful when dealing with particular classes of systems, and the incorporation of additional features to handle control scenarios other than just stabilization. On the application side the method has provided solutions to a wide variety of physical problems. The purpose of this paper is to review the fundamental theory, main new results and practical applications of this control system design approach as well as to discuss the current open problems and future directions.

关键词： Hamiltonian systems interconnection non-linear systems passivity passivity-based control stabilization

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Soft computing in ambient intelligence 2

Soft computing in ambient intelligence

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2nd ifac workshop on Advanced Fuzzy/Neural control, AFNC 2004

作者： Koivo, Heikki N. Control Engineering Laboratory Helsinki University of Technology PO Box 5500 HUTFIN-02015 Finland

Ambient intelligence is a new exciting and rewarding field for a multidisciplinary engineering effort. Microsystem technology, wireless communication, pervasive computing are some of the technologies needed. Sof t computing can provide many useful solutions to the difficult problems posed by the new challenges of ambient intelligence. Copyright © 2004 ifac.

关键词： Soft computing

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Approximating the minimal sensor selection for supervisory control 7

Approximating the minimal sensor selection for supervisory c...

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7th International workshop on Discrete Event Systems, WODES 2004

作者： Khuller, Samir Kortsarz, Guy Rohloff, Kurt R. Department of Computer Science University of Maryland College ParkMD20742 United States Computer Science Department Business and Science Building Rutgers University CamdenNJ United States Department of EECS University of Michigan 1301 Beal Avenue Ann ArborMI48109-2122 United States

This paper discusses the problem of selecting a set of sensors of minimum cardinality that can be used for the synthesis of a supervisory *** show how this sensor selection problem is related to a type of directed graph st-cut problem that has not been previously discussed in the literature. Approximation algorithms to solve the sensor selection problem can be used to solve the graph cut problem and vice-versa. Polynomial time algorithms to find good approximate solutions to either problem most likely do not exist (under certain complexity assumptions), but a time efficient approximation algorithm is shown that solves a special case of these problems. © 2004 ifac.

关键词： Discrete event simulation

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generalized solutions in optimal control problems with phase constraints *

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ifac Proceedings Volumes 2004年第17期37卷 176-184页

作者： Boris M. Miller Institute for Information Transmission Problems Russian Academy of Sciences B. Karetny 19 GSP-4 127994 Moscow Russia

The optimal control problem for systems with unilateral phase constraints is considered. The approaches to the definition of the generalized solutions, existence of the optimal control problem solution, and necessary ... 详细信息

关键词： impulse controls generalized solutions phase constraints optimization maximum principle

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A generalized framework for distributed intelligent process automation

A generalized framework for distributed intelligent process ...

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4th International workshop on Robot Motion and control

作者： Enam-ur-Rehman, S Sikander, A Shaffique, U Sir Syed Univ Engn & Technol Dept Comp Engn Karachi 75300 Pakistan

ISBN: (纸本)8371432720

Rapid advancements in computing have lead to sophisticated solutions for real world problems requiring complex logic, hefty interfaces and growing need of intelligence. This elaborates the importance of isolation of logic from interfaces and the availability of reusable standardized tools for tasks, most commonly required by various processes. Auto-Mate is a generic framework aimed at meeting these requirements. A novel approach has been adopted by employing Soar (a general cognitive architecture and AT engine) as a dedicated element for controlling the functionality of the system. The framework also focuses on providing standardized and generic interfaces for software components as well as physical links for hardware interconnection. The framework is made extendible, scalable and compatible with multiple platforms and services for supporting applications of variant magnitudes and scope. Auto-Mate is most suitable for process automation based on discrete events.

关键词： Process control

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