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IEEE International Conference on Intelligent Processing Systems, ICIPS

作者： Shu-Meng Pei Li Shen Le-Nian Ye Institute of Computer Technology Chinese Academy and Sciences Beijing China Department of Automatic Control Engineering South China University of Technology Guangzhou China

ISBN: (纸本)0780342534

To reduce the difficulties involved in choosing an appropriate fuzzy knowledge base, i.e. scaling factors, membership functions, rules, etc., of a fuzzy PI controller that is capable of control in most industrial environments, a kind of fuzzy controller with a hierarchical structure is proposed which takes accumulated control as an input in addition to the error and change of error. The new fuzzy controller is divided into several subcontrollers which can be designed separately. Each subcontroller can be designed easily and can perform well in a certain running state. When all the subcontrollers perform well, the hierarchical fuzzy controller can obtain a good performance. A general strategy for dividing up the whole controller is defined. Simulation results show that both the transitory performance and the steady-state performance are better than that of conventional fuzzy PI controllers. The proposed hierarchical fuzzy controller is applied to a 10 tonne/hour coal-burning grate boiler and some real-time running results are given.

关键词： Fuzzy control Industrial control Error correction Fuzzy logic Velocity control automatic control PD control Performance gain Knowledge engineering Appropriate technology

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On information processing capacity of anti-aircraft tactic command and control systems

On information processing capacity of anti-aircraft tactic c...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Jiacun Wang M. Zhou Department of Automatic Control Nanjing University of Science and Technology of PLA Nanjing China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA

A powerful method for the modeling of the task processing of anti-aircraft tactic command and control systems (AATCCS) via stochastic Petri net (SPN) tool is proposed and discussed. The principle of the analysis of task processing capacity for a discrete event system based on SPN model is established. The task processing model of a generic typical anti-aircraft tactic C2 systems with two-level command centers is built, and the procedure to the analysis of the maximum information processing capacity of the systems is developed. The method and results show their promise in their applications to real C2 system design.

关键词： Information processing Command and control systems Radar Power system modeling Information analysis Stochastic systems Petri nets Flowcharts Decision making Discrete event systems

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Multimode fuzzy-CMAC intelligent controller

Multimode fuzzy-CMAC intelligent controller

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American control Conference (ACC)

作者： Guo Chen D.P. Kwok Sun Zengqi Yu Jingzhe Department of Automatic Control Dalian Maritime University Dalian China Department of Electronic Engineering Hong Kong Polytechnic University Hung Hom China Department of Computer Science and Engineering Tsinghua University Beijing China

Proposes a combined controller structure and algorithm which integrates a cerebellar model articulation controller (CMAC) with fuzzy logic and bang-bang control under an intelligent supervisor. This neuro-fuzzy controller has self-learning ability in real-time and can readily be applied to industrial process plants. The numerical results of simulation studies, which demonstrate the benefit and feasibility of the proposed algorithm, are presented.

关键词： control systems automatic control Fuzzy logic Force control Intelligent structures Neural networks Optimal control Bang-bang control Process control Steady-state

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On the numerical speed control of electrical drive systems using stepping motors

On the numerical speed control of electrical drive systems u...

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IEEE International Conference on Intelligent engineering Systems (INES)

作者： G. Baluta S. Resmerita Faculty of Electrical Engineering Department of Electric Drivcs and Power Electronics E2809CGh. Asachi E2809DTechnical University of Iasi Lasi Romania Faculty of Automatic Control and Computer Engineering Department of Automatic Control and Industrial Informatics E2809CGh. Asachi E2809DTechnical University of Iasi Lasi Romania

The paper focuses on the speed control of stepping motors in a closed-loop configuration. An incremental optical encoder is used as the position transducer, allowing the achievement of a minor loop. The numerical control algorithm is implemented using an IBM PC together with a specialized interface for stepper motors. The solution was obtained in two steps: the first was a nonlinear control law and the second was the improvement of the first one by using a PI part.

关键词： Velocity control Samarium automatic control Pulse circuits Optical feedback Nonlinear optics Transducers computer numerical control Digital control Pulse generation

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

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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

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

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

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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

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Intelligent controller design for the ship steering problem

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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

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Implementation of the velocities of the end-effector with the distributed arithmetic architecture

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JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS 1996年第4期17卷 387-417页

作者： Grigoriadis, GK Mertzios, BG Automatic Control Systems Laboratory Department of Electrical and Computer Engineering Democritus University of Thrace 67100 Xanthi Greece

The fast implementation of the linear and of the angular velocities of the end-effector of robotic manipulators, using the distributed arithmetic technique is described. The linear and angular velocities of the end-effector as well as the positional and the orientational Jacobian matrices is calculated by a cascade configuration of two pipelined arrays. The building blocks of the arrays are the distributed arithmetic-based circuits that implement the matrix-vector multiplications involved in the calculations. The digit-serial configuration of the proposed implementation of the linear and angular velocities of the end-effector is described, while the serial and the parallel configurations may result as special cases of the digit-serial configuration. The proposed distributed arithmetic computer architecture may be used in the real-time operation of the robot control system that requires the on-line computation of the position, of the linear and angular velocities of the end-effector and of the Jacobian matrix.

关键词： robot kinematics linear velocity angular velocity positional and orientational Jacobian matrices fast implementation pipelining distributed arithmetic and end-effector

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Fast algorithms for basic processing and analysis operations on block-represented binary images

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PATTERN RECOGNITION LETTERS 1996年第14期17卷 1437-1450页

作者： Spiliotis, IM Mertzios, BG Automatic Control Systems Laboratory Department of Electrical and Computer Engineering. Democritus University of Thrace Xanthi 67100 Greece

This paper describes a binary image representation scheme, called Image Block Representation and presents new algorithms for a number of basic binary image processing and analysis operations, which are rapidly implemented on block-represented binary images. The main purpose of the Image Block Representation is to provide an efficient binary image representation that permits the execution of operations on image areas instead of image points.

关键词： image block representation image normalization image measurements logic operations

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A unified adaptive active control mechanism for noise cancellation and vibration suppression

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MECHANICAL SYSTEMS AND SIGNAL PROCESSING 1996年第6期10卷 667-682页

作者： Tokhi, MO Hossain, MA Department of Automatic Control and Systems Engineering The University of Sheffield Sheffield U.K. Department of Computer Science University of Dhaka Dhaka Bangladesh

This paper presents the design and implementation of an active control mechanism for noise cancellation and vibration suppression within an adaptive control framework. A control mechanism is designed within a feedforward control structure on the basis of optimum cancellation at an observation point. The design relations are formulated such that to allow on-line design and implementation and thus result in a self-tuning control algorithm. The algorithm is implemented on an integrated digital signal processing (DSP) and transputer system. Simulation results verifying the performance of the algorithm are presented and discussed. (C) 1996 Academic Press Limited

关键词： Adaptive control systems

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