检索结果-内蒙古大学图书馆

Decentralized Robust controller for Exponential Stability of Uncertain systems with Output Feedback

IFAC Proceedings Volumes 1997年第16期30卷 131-136页

作者： V. Vesely D. Rosinova Department of Automatic Control Systems Faculty of Electrical Engineering and Information Technology Slovak University of Technology 812 19 Bratislava Slovak Republic fax: ++421 7 729 734

The paper addresses the problem of design of robust decentralized controllers with output feedback for interconnected linear systems with uncertainties. A new class of robust continuous-time and discrete-time controllers is proposed to guarantee exponential stability of uncertain linear systems without matching conditions. The uncertainties possibly nonlinear can appear both in the subsystems and in the interconnections between them. The proposed algorithm is applied to 6th order system model comprising two subsystems with decentralized controller.

关键词： Decentralized control Robust stability Uncertain dynamic systems

来源：评论

学校读者我要写书评

暂无评论

Program Solution of Supervisory control Based on Petri Nets

引用

IFAC Proceedings Volumes 1997年第21期30卷 323-327页

作者： Jana Flochová Branislav Hrúz Peter Jirsák Automatic Control Systems Department Faculty of Electrical Engineering and Information Technology Slovak Technical University Ilkovičova 3 812 19 Bratislava Slovak Republic phone: +42-7-791698

This paper describes methods based on Petri nets analysis techniques for constructing a supervisory controller of discrete event dynamic systems. Two methods (method based on reachability tree analysis and on-line method based on matrix equations) have been designed. Programs in C++ have been written to solve supervisory control problem and real time control of a discrete event dynamic system.

关键词： Discrete event dynamic systems Supervisory control Petri-nets Reachability Reachable states Computer control system design Computer testing Programs Program controllers

来源：评论

学校读者我要写书评

暂无评论

On the existence of an optimal synthesis for a class of linear discrete-time systems with quadratic costs and a fixed target point

On the existence of an optimal synthesis for a class of line...

引用

Southeastern Symposium on system Theory

作者： Guoqing Tang Zidong Wang Department of Mathematics North Carolina Agriculture and Technical State University Greensboro NC USA Automatic Control Laboratory Faculty of Electrical Engineering Ruhr Universitaet Bochum Bochum Germany

ISBN: (纸本)0818678739

We use the dynamic programming and approximation techniques to prove the existence of an optimal synthesis for a class of linear discrete time systems with quadratic costs and a fixed target point, in which the optimal control law is given in the feedback form of time and state. Our result establishes an analogy in synthesizing fixed target point linear quadratic regulator problems between linear continuous time systems and this class of linear discrete time systems.

关键词： control system synthesis Cost function Regulators Mathematics automatic control Laboratories Dynamic programming Optimal control State feedback State-space methods

来源：评论

学校读者我要写书评

暂无评论

Considerations Concerning the Speed control of Electrical Drive systems with Stepper Motors

引用

IFAC Proceedings Volumes 1997年第27期30卷 455-460页

作者： Gheorghe Bãluṭă Ştefan Resmeriṭă Gheorghe Bäluṭă “Gh. Asachi” Technical University of Iasi Faculty of Electrical Engineering Electric Drives and Power Electronics Department Str. Horia No. 7-9 6600 Iasi Romania tel.032/112770 Ştefan Resmeriṭà “Gh. Asachi” Technical University of Iasi Faculty of Automatic Control and Computer Engineering Department of Automatic Control and Industrial Informatics Str. Horia No. 7-9 6600 Iasi Romania tel. 032/116502 tuiasi.ro

This paper presents a method for Stepper Motor (SM) speed control by means of a minor loop. The compatibility of the SM with the digital electronics allowed a PC to be used for implementing the control algorithm, the SM control being achieved by two hardware interface levels. The SM command is realized with two specialized circuits: L297 (SM controller) and L298N (driver). The control signals for this level are generated through a parallel port 18255 and a programmable timer 18253. Some other circuits complete the microprocessor interface. The software has the following tasks: speed measurement and control algorithm achievement of a PI type. To tune this controller the system characteristics are measured, when the system is unstable, having a relay instead of the PI part. There are treated aspects on choosing the sample period, the position transducer, and the type of speed measurement.

关键词： control applications control closed-loop Stepping motors Numerical algorithms Computer controlled systems

来源：评论

学校读者我要写书评

暂无评论

Analysis of deadlocks and circular waits using a matrix model for discrete event systems

Analysis of deadlocks and circular waits using a matrix mode...

引用

IEEE Conference on Decision and control

作者： F.L. Lewis S. Bogdan A. Gurel O. Pastravanu Automation and Robotics Research Institute University of Texas Arlington Worth TX USA Faculty of Electrical Engineering and Computer University of Zagreb Zagreb Croatia Department Automatic Control and Ind. Inf Polytechnic Institute Iasi Romania

A new matrix rule-based model of discrete-part discrete event systems is given that, together with the well-known Petri net marking transition equation, yields a complete matrix-based dynamical description of these systems. In this application to deadlock analysis, the exact relations between circular blockings and deadlocks are given for a large class of reentrant flow lines. Explicit matrix equations are given for online dynamic deadlock analysis in terms of circular blockings, and certain 'critical siphons' and 'critical subsystems'. This allows efficient dispatching with deadlock avoidance using a generalized kanban scheme. For the class of flow lines considered, the existence of matrix formulae shows that deadlock analysis is not NP-complete, but of polynomial complexity.

关键词： system recovery Discrete event systems Equations Dispatching Robotics and automation Petri nets Manufacturing Bills of materials Assembly Lifting equipment

来源：评论

学校读者我要写书评

暂无评论

Intelligent controller design for the ship steering problem

引用

IEE PROCEEDINGS-control THEORY AND APPLICATIONS 1996年第1期143卷 17-24页

作者： Enab, YM Faculty of Engineering Automatic Control & Computer Engineering Department El-Mansoura University El-Mansoura Egypt

The reason for the present upsurge of interest in intelligent control is that the present generation of control systems are incapable, to a greater or lesser extent, of dealing with problems of a certain complexity. Fortunately, the human operator (HO) is often expert in keeping the complex control systems on the right track. In this paper a method for controller design has been investigated based on a concept of developing a mathematical model for HO behaviour. The method treats HO behaviour as a dynamic process by itself, transformed from the unknown dynamics of the ship to be controlled. The method of controller design entails observing the human controller, constructing a model of the human controller, and using that model as a basis for an automatic control system. During the observation phase the HO controls the ship and the data representing the state of the ship and human actions are registered. During the modelling phase, a human operator behaviour model (HOBM) is constructed as a neural network and its parameters are estimated. During the testing phase, the HOBM controls the ship and its performance is evaluated under the observation phase conditions and completely different conditions. The method has been successfully applied using computer simulation for the ship steering problem.

关键词： man-machine systems intelligent control neural networks learning systems

来源：评论

学校读者我要写书评

暂无评论

On the instability of equilibrium of non-holonomic systems with a non-analytic potential

引用

INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS 1996年第4期31卷 459-463页

作者： Veskovic, M Faculty of Mechanical Engineering Department for Mechanics and Automatic Control University of Kragujevac Dositejeva 19 36000 Kraljevo Yugoslavia

We have proved the theorem on the instability of equilibrium of non-holonomic systems in the field of conservative forces under the following assumptions: the equilibrium position is the critical point of the potential;the potential is non-analytical and can be expressed in the form of the sum of the homogeneous function of a positive homogeneity degree and an infinitesimally small function in comparison with the homogeneous function when the latter tends to zero;in the subspace which is orthogonal to the vectors of the non-holonomic constraints computed in the equilibrium position, the homogeneous part of the potential has negative values. The suggested theorem is a generalization of the results from [V. V. Kozlov, Soviet Math. Dokl. 33, 654-656 (1986) reprinted by the American Mathematical Society (1987)]. Copyright (C) 1996 Elsevier Science Ltd.

关键词： instability non-holonomic system equilibrium

来源：评论

学校读者我要写书评

暂无评论

Robust Fault Detection Using Index of Kullback Discrimination Information

引用

IFAC Proceedings Volumes 1996年第1期29卷 6524-6529页

作者： K. Kumamaru J. Hu K. Inoue T. Söderström Department of Control Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka 820 Fukuoka Japan. Department of Automatic Control and Systems Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

This paper presents a robust fault detection system (FDS) for dynamic systems with unmodeled dynamics. In the FDS, umnodeled dynamics is first qualified as soft bound, which as well as model parameters are estimated using a robust identification algorithm. Then as a fault detection index, Kullback discrimination information (KDI) is derived into a feasible form and an index of umnodeled dynamics is also introduced. A decision making scheme is thus developed so that fault detection is carried out based on the KDI, the index of umnodeled dynamics and other prior information about the system.

关键词： Fault detection parameter identification stochastic modeling robust estimation uncertainty

来源：评论

学校读者我要写书评

暂无评论

Internal model control of a robot using new neural networks

Internal model control of a robot using new neural networks

引用

IEEE International Conference on systems, Man and Cybernetics

作者： S. Yildirim M.F. Sukkar Robotics Research Laboratory Mechanical Engineering Department Faculty of Engineering University of Erciyes Kayseri Turkey Automatic Control and Ind. Electronics Departmentartment Faculty of Electrical and Electronics Engineering University of Aleppo Aleppo Syria

The use of neural networks for control of a robot manipulator is presented in this paper. The control system consists of a neural model of the robot, a neural controller and a conventional PID controller. The control structure uses internal model control (IMC). The Alopex method is employed as a learning algorithm to train the networks. The standard backpropagation (BP) algorithm is also utilised for comparison with the Alopex learning algorithm (ALA). The proposed network is a recurrent hybrid network which is suitable for identification and control of robot manipulators. Compared to neural networks with pure nonlinear hidden processing elements, e.g., the diagonal neural network, the proposed recurrent hybrid network converges faster than taught to identify linear and nonlinear dynamics systems. Simulation results are presented to evaluate the performance of the IMC for the control of a SCARA-type robot manipulator.

关键词： Robot control Neural networks automatic control Robotics and automation Manipulator dynamics Adaptive control Uncertainty Robust control Nonlinear systems Feedforward neural networks

来源：评论

学校读者我要写书评

暂无评论

Composition of Conflict-Free Petri Net Models for control of Flexible Manufacturing systems

引用

IFAC Proceedings Volumes 1996年第1期29卷 547-552页

作者： B. Hrúz A.J. Niemi T. Virtanen Slovak Technical University Faculty of Electrical Engineering and Information Technology Department of Automatic Control Systems Ilkovicova 3 812 19 Bratislava Slovak Republic phone: +42 -7-791698 Helsinki University of Technology Department of Information Technology Control Engineering Laboratory Otakaari 5A FIN-02150 Espoo Finland phone: +358-0-4513334

An approach using Petri nets to modelling and control of flexible manufacturing systems (FMS) is worked out in the paper. A class of Petri nets suitable for the modelling of FMS and for the design of their control is formulated. In the Petri net models not only conflicts due to mutual exclusions of the shared system resources but conflicts of branching operations are analyzed and solved, as well. Models of FMS suitable for system performance analysis and control design are built up of a set of elementary building blocks proposed in the paper. Analysis, modelling method and control design is developed on the background of a pilot experimental FMS developed at the Helsinki University of Technology.

关键词： Discrete event dynamic systems flexible manufacturing systems Petri nets control oriented models

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：