检索结果-内蒙古大学图书馆

IEEE Conference on Decision and control

作者： F.M. Koumboulis P.N. Paraskevopoulos K.G. Tzierakis R.E. King Department of Electrical Engineering Division of Computer Science National and Technical University of Athens Athens Greece Department of Electrical Engineering Division of Systems and Control University of Patras Patras Greece

The problem of disturbance rejection with simultaneous triangular decoupling via proportional state feedback for linear, time-invariant systems is discussed. The following two major aspects are solved: the necessary and sufficient conditions for the problem to have a solution, and the general analytical expressions of the controller matrices.< >

关键词： Time invariant systems Equations State feedback control systems Sufficient conditions control design computer science Vectors Proportional control Frequency domain analysis

来源：评论

学校读者我要写书评

暂无评论

Intelligent Adaptive control of Mode-Switch Processes

引用

IFAC Proceedings Volumes 1991年第1期24卷 145-150页

作者： R.A. Hilhorst J. van Amerongen P. Löhnberg H.J.A.F. Tulleken Control Systems and Computer Engineering Group Dept of Electrical Engineering University of Twente and Mechatronics Research Centre Twente P. O. Box 217 7500 AE Enschede The Netherlands Process Systems Group Dept of Mathematics & Systems Engineering Koninklijke/Shell-Laboratorium (Shell Research B.V.) P.O. Box 3003 1003 AA Amsterdam The Netherlands

The intelligence of controllers has increased over the decades. However, the number of applications of adaptive controllers is still restricted, due to practical limits of the implemented continuous adaptation. For processes which operate only in a limited number of modes (so called mode-switch processes), constant adaptation is not needed or desired. In this paper an intelligent extension of adaptive control will be presented, in which process behaviour can be stored in a memory, retrieved from it and evaluated for each mode of operation. This intelligent memory concept leads to an adaptive control structure which, after a learning phase, quickly adjusts the controller parameters based on retrieval of old information, without the need to relearn every time. This approach has been tested on a simulation model of an assembly robot, but it is directly applicable to many processes in the (petro)chemical industry.

关键词： Adaptive control Supervisory control Automatic tuning Mode-switch Processes Bumpless transfer

来源：评论

学校读者我要写书评

暂无评论

Fundamentals of control-oriented system identification and their application for identification in H∞

Fundamentals of control-oriented system identification and t...

引用

American control Conference (ACC)

作者： A. J. Helmicki C. A. Jacobson C. N. Nett Department of Electrical and Computer Engineering University of Cincinnati Cincinnati OH USA Department of Electrical and Computer Engineering Northeastern University Boston MA USA School of Aerospace Engineering Laboratory for Identification and Control of Complex Highly Uncertain Systems Georgia Institute of Technology Atlanta GA USA

This paper examines the system identification problem from the standpoint of control system design. Noting first that nearly all robust control design methods require explicit worst-case/deterministic bounds on the existing plant uncertainty, it is argued that the class of system identification methods which are inherently compatible with robust control design methods-or control-oriented is a subset of the class of system identification methods which yield an explicit worst-case/deterministic bound on the resulting identification error. An abstract theoretical framework for control-oriented system identification is then developed. This framework is inherently worst-case/deterministic in nature, and makes precise such notions as identification error, algorithm convergence, and algorithm optimality from a worst-case/deterministic standpoint. Finally, the abstract theoretical framework is utilized to formulate and solve two related control-oriented system identification problems for stable, linear, shift-invariant, distributed parameter plants. In each of these problems the assumed apriori information is minimal, consisting only of a lower bound on the relative stability of the plant, an upper bound on a certain gain associated with the plant, and an upper bound on the noise level. In neither case are any assumptions made concerning the structure of either the plant (i.e., dynamic order, relative order, etc.) or the noise (i.e., zero-mean, etc.). The first of these problems involves identification of a point sample of the plant frequency response from a noisy, finite, output time series obtained in response to an applied sinusoidal input with frequency corresponding to the frequency point of interest.

关键词： control systems System identification Robust control Design methodology Upper bound Frequency Uncertainty Error correction Convergence Stability

来源：评论

学校读者我要写书评

暂无评论

New style for three-layer channel routing

New style for three-layer channel routing

引用

IEEE International Symposium on Circuits and systems (ISCAS)

作者： L.K. Chang K. Nakajima Control Engineering Department National Chiao Tung University Hsinchu Taiwan Department of Electrical Engineering Institute of Advanced Computer Studies and Institute of Systems Research University of Maryland College Park MD USA

The authors propose a new style for three-layer channel routing. Liked the horizontal-vertical-horizontal (HVH) model, the middle layer is reserved for all vertical connections to the terminals on both sides of a channel. However, the authors use rectilinear wires on the top and bottom layers to complete the remaining routing. Using this model, the authors develop a channel router and show that it produces optimum solutions to all the benchmark examples tested. The algorithm runs in O(n/sup 2/w+wl) time, where n, w, and l are the number of nets, the channel width, and the sum of lengths of wires for the nets, respectively. It was implemented in C on a Sun 3/160 workstation. The experimental results are provided.< >

关键词： Routing Wire Wiring control engineering Educational institutions Benchmark testing Integrated circuit layout Heuristic algorithms Councils

来源：评论

学校读者我要写书评

暂无评论

A study of PD-characteristic equations for time-varying linear systems using coordinate transformations

A study of PD-characteristic equations for time-varying line...

引用

Southeastern Symposium on System Theory

作者： J. Zhu A.P. Bukley Electrical & Computer Engineering Louisiana State University Baton Rouge LA USA Pnjnting & Control Systems Branch NASA Marshall Space Flight Center Huntsville AL USA

This paper is concerned with a Riccati type class of nonlinear differential equations called parallel D-characteristic (PD-characteristic) equations, associated with time-varying linear dynamic systems which are described by differential equations. The solutions of PD-characteristic equations are known to possess singularities (finite-time escapes), which greatly hampers their use in the analysis and control of time-varying linear systems. A theorem is developed to show that the solutions of PD-characteristic equations are well-behaved near the singularities This result allows the classical notion of continuability of solutions to be extended through such singularities. A number of coordinate transformations are also discussed which facilitate numerical integration through such singularities.< >

关键词： Time varying systems Linear systems Differential equations Eigenvalues and eigenfunctions Riccati equations control systems Nonlinear equations Nonlinear control systems control system analysis Stability analysis

来源：评论

学校读者我要写书评

暂无评论

DIGNET: a self-organizing neural network for automatic pattern recognition and classification

DIGNET: a self-organizing neural network for automatic patte...

引用

IEEE Conference on Decision and control

作者： S.C.A. Thomopoulos D.K. Bougoulias Decision and Control Systems Laboratory Department of Electrical & Computer Engineering Pennsylvania State University University Park PA USA Information Proc. & Intell. System Laboratory Department of Electrical Engineering Southem Illinois University Carbondale IL USA

The authors present a self-organizing artificial neural network (ANN) that exhibits deterministically reliable behavior to noise interference when the noise does not exceed a specified level of tolerance. The complexity of the proposed ANN, called DIGNET, in terms of neuron requirements versus stored patterns, increases linearly with the number of stored patterns and their dimensionality. The self-organization of DIGNET is based on the idea of competitive generation and elimination of attraction wells in the pattern space. The same neural network can be used for both pattern recognition and classification.< >

关键词： Neural networks Pattern recognition Artificial neural networks Neurons Interference Vectors Laboratories Noise level Signal detection Automatic control

来源：评论

学校读者我要写书评

暂无评论

Worst Case System Identification in l1: Optimal Algorithms and Error Bounds

Worst Case System Identification in l1: Optimal Algorithms a...

引用

American control Conference (ACC)

作者： C. A. Jacobson C. N. Nett Department of Electrical and Computer Engineering North Eastern University Boston MA USA Laboratory for Identification and Control of Complex Highly Uncertain Systems (LICCHUS) School Institute of Technology Georgia Institute of Technology Atlanta GA USA

This paper analyzes worst case identification of linear shift invariant systems with an l 1 error criterion. A characterization of optimal algorithms and intrinsic errors of identification is given. The application of this characterization is made to identification in l 1 . The assumed apriori information on the plant are bounds on the system gain and decay rate of the impulse response of the unknown system and the experimental data is assumed to be a finite set of corrupted impulse or step response samples of the systems. Comparisons are made with the H ∞ system identification problem. Comments on the l 1 identification of small signal models of smooth nonlinear discrete time systems are made.

关键词： System identification Robust control Convolution Jacobian matrices Algorithm design and analysis Signal processing Discrete time systems control system synthesis Nonlinear control systems Design methodology

来源：评论

学校读者我要写书评

暂无评论

New algorithms for earthfault distance protection in insulated and compensated networks

引用

European Transactions on Electrical Power 1991年第5期1卷 253-259页

作者： Igel, M. Koglin, H.‐J. Schegner, P. Dr.-lng. Michael Igel (1961). VDE received his Dip1.-lng. degree in Electrical Engineering at the University of SaarlandGermany. in 1987 and became scientific assistant at the Lehrstuhl fur Energieversorgung of this University. After receiving his Dr.-Ing. degree in 1990. he presently works as development engineer of the department of protection systems in the power transmission and distribution division of AEG at Frankfurt a. M./Germany. (AEG Aktiengesellschaft Lyoner Str. 44-48. D-6000 Frankfurt 7 I T + 49 69/66 40 16 I 7) Prof. Dr.-lng. Hans-Jurgen Koglin (1937). VDE holds the Lehrstuhl fur Energieversorgung of the University of SaarlandGermany since 1983. After the study of Electrical Engineering (power engineering) at the Technische Hochschule DarmstadtIGermany. he worked as a scientific assistant at the “Institut fur Elektrische Enerpieversorgung” of this Unive:rsity. After receiving his Dr.-lng. degree he tirst worked as assistant professor later on as full Professor at the Technische Hochschule Darmstadt (Department “Systemfuhrung in Energieversorgungsnetzen”). He is member i n several national and international committees. His most important research activities are: reliability evaluation computer-optimized network development planning digital network protection systems substation control system state estimation. corrective switching visibility of overhead lines. (Universitat des Saarlandes Lehrstuhl fur Energieversorgung Im Stadtwald D-6600 Saarbriicken I I T + 4 9 6 8 113 023979) Dr.-Ing. Peter Schegner (1955) VDEis head of the development department of protection systems in .the power transmission and distribution division of AEG at Frankfurt a. M./Gerrnany. He studied Electrical Power Engineering at the Technische Hochschule Darmstadt/Genany and worked as system engineer in the field of power system control. He became a member of the scientific staff at the Universitiit des Saarlandes receiving his degree with a thesis on the earthfault distance protection. (AEG Aktiengesellschaft

Through the analysis of transient signals after the occurrence of an earthfault it is possible to evaluate fault direction and fault distance. The faulty line is simulated by using a three phase Tl‐model. The result is a differential equation of a higher order, which only consists of voltages and currents, which are measured at the installation point of the relay. If the capacities of the part of the network without earthfault are considerably larger than those of the faulty line, the line capacities of the faulty line can be ignored in the differential equation. This results in afirst‐jorder differential equation, which can be solved by integration in the time domain. A second algorithm takes the line capacities into consideration. The derivatives of the input signals are calculated in the frequency domain. A third algorithm calculates the equivalent fault inductivity in the frequency domain by complex division. The last algorithm deals with the line capacities by using correction factors. The mode of operation of the earthfault distance algorithms presented here will be shown with the example of a 22‐kV‐overhead line network. Copyright © 1991 John Wiley & Sons, Ltd.

关键词：

来源：评论

学校读者我要写书评

暂无评论

THE ESTIMATION OF GEOMETRY AND MOTION OF A SURFACE FROM IMAGE SEQUENCES BY MEANS OF LINEARIZATION OF A PARAMETRIC MODEL

引用

computer VISION GRAPHICS AND IMAGE PROCESSING 1990年第1期50卷 1-28页

作者： KORSTEN, MJ HOUKES, Z Control Systems and Computer Engineering Laboratory Faculty of Electrical Engineering University of Twente P.O. Box 217 7500AE Enschede The Netherlands

A method is given to estimate the geometry and motion of a moving body surface from image sequences. To this aim a parametric model of the surface is used, in order to reformulate the problem to one of parameter estimation. After linearization of the model standard linear estimation methods can be used to estimate the parameters. The main contribution of this paper is that a method is provided to perform the linearization without specifying the model. Therefore structure from motion estimation and nonrigid body motion estimation can be performed regardless of the model.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Non-linear filtering to improve dexterity in spatial control

引用

Transactions of the Institute of Measurement & control 1990年第1期12卷 44-48页

作者： Bosman, D. Bakker, W. Faculty of Electrotechnology Control Systems and Computer Engineering Group Vision Laboratory University of Twente 7500 AE Enschede The Netherlands United States

Task-dependent response - eg, in instrument calibration, spatial positioning and the like - is a long nursed requirement: transition to the end state very fast, albeit imprecise, followed by slower but very accurate final action. The realisation, of course, is a non-linear filter which can take many levels of refinement. In this paper the analysis is presented of the most simple continuous type and it is shown that signal-dependent overshoot (associated with fast response) can be obtained using networks with strictly low-pass (non-negative) impulse response. © 1990, Sage Publications. All rights reserved.

关键词： adaptive dexterity Non-linear filter spatial control spreading

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：