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Error compensation on precision machine tool servo control system based on digital concave filter

Journal of Harbin Institute of Technology(New Series) 2001年第4期8卷 389-393页

作者：王立松苏宝库张晶董申 Dept. of Control Theory and Engineering Harbin Institute of Technology Dept. of Computer Science and Engineering Harbin Institute of Technology Dept. of Mechanical Engineering and Automation Harbin Institute of Technology

It is concluded from the results of testing the frequency characteristics of the sub micron precision machine tool servo control system, that the existence of several oscillating modalities is the main factor that affects the performance of the control system. To compensate for this effect,several concave filters are utilized in the system to improve the control accuracy. The feasibility of compensating for several oscillating modalities with a single concave filter is also studied. By applying a modified Butterworth concave filter to the practical system, the maximum stable state output error remains under ±10 nm in the closed loop positioning system.

关键词： precision machine tool concave filter oscillating modality

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Design and implementation of adaptive neural networks algorithm for DC motor speed control system using simple microcontroller

Design and implementation of adaptive neural networks algori...

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4th IEEE International Conference on Power Electronics and Drive Systems

作者： Machbub, Carmadi Prihatmanto, Ary Setijadi Cahaya, Yoseph Dwi Computer and Control Laboratory Electrical Engineering Dept. Institut Teknologi Bandung Bandung Indonesia

This paper shows design & implementation of adaptive neural networks controller for DC Motor Speed control System. DC Motor is actuated by Pulse Width Modulation (PWM)-based H-Bridge actuator. By using certain learning methods to the networks, changing plant's parameter can be estimated and used to produce appropriate control action. The experiment shows that the controller conforms the adaptive control scheme, although there are flaws which related to feedback resolution. The most interesting result is that the implementation circuit is based on very simple 8-bit microcontroller system.

关键词： DC motors

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Hard Platooning Versus Soft Platooning in Large-Scale Highway Transportation Systems

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IFAC Proceedings Volumes 2001年第8期34卷 457-463页

作者： S.A. Manesis Electrical and Computer Engineering Dept. Division of Systems and Control University of Patras

The formation of a convoy of cars (platoon) by linking these electronically (soft platooning) or mechanically (hard platooning) are two of the most researched methods in highway transportation systems, particularly the first one that is the base of the Automated Highway Systems. This paper focuses on the advantages and disadvantages of both systems and introduces the main technical problems of them. The need for new traffic rules is examined in the case of truck train travels on a multi-lane highway. The kingpin sliding technique is also proposed to face the off-tracking phenomenon of multi-articulated vehicles. Some conclusions from the comparison of the two systems are also given

关键词： Transportation systems automated highway systems vehicle platoons vehicle trains path following off-tracking

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Intelligent control for Off-Tracking Elimination in Long Articulated Vehicles with Multiple Semi-Trailers

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IFAC Proceedings Volumes 2001年第8期34卷 223-228页

作者： G.N. Davrazos S.A. Manesis N.T. Koussoulas Electrical and Computer Engineering Dept. Division of Systems and Control University of Patras

The motion of a multi-body autonomous robot as well as of a train-like multi-articulated transportation vehicle is characterized by the deviation of the path of each intermediate vehicle from that of the leading one (off-tracking). This paper proposes an intelligent controller for the elimination of the off-tracking phenomenon, in both robotic and transportation multi- articulated vehicles. By using a sliding kingpin technique that allows articulated semi-trailers to follow closely the tractor's path, and taking into consideration the heuristic knowledge that stems from the driving practice and the tests' experience, a fuzzy rule-based controller has been developed to determine the sliding distance and the sliding rate of the kingpin mechanism. Simulation results for various cases, without and with the sliding kingpin system showed that off-tracking elimination is achieved to a significant degree through the use of intelligent controller.

关键词： Transportation systems fuzzy control vehicle trains off-tracking

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Object-oriented modeling for remote monitoring of manufacturing processes

Object-oriented modeling for remote monitoring of manufactur...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： M. Marcos I. Calvo D. Orive I. Sarachaga J.M. Fuertes P. Marti R. Villa S. Buzoianu Department of Automatic Control and Systems Engineering University of Basque Country (UPV-EHU) Bilbao Spain Dept. of Automatic Control and Systems Engineering University of the Basque Country Bilbao SPAIN Dept. of Automatic Control and Computer Engineering Technical University of Catalonia Barcelona SPAIN

ISBN: (纸本)0780372417

Deals with the use of object oriented technologies in the modeling of industrial plants that have to be remotely monitored and/or controlled. The main goal is to propose a design methodology for obtaining the model of the so-called Virtual Plant, that a remote and certified user will use to access the real plant for performing command actions and/or monitoring. The type of applications and systems targeted must have autonomous behavior and be interconnected and accessible. Reliability, maintainability and flexibility are also required goals, as well as a high rate of reusability of the applications. The methodology has been applied to the remote process monitoring and control of manufacturing processes. The Virtual Plant Model is, in fact, the part of the plant that can be accessed by a certified remote client and thus it can be constituted by a set of sub-models, as many as different types of clients. The Virtual Plant resides inside the Application Server who is responsible of communicating with the cell controller and sends the image of the actual plant state (the Virtual Plant) as required by the remote client (monitoring) or sends the client commands to the cell controller.

关键词： Object oriented modeling Remote monitoring Manufacturing processes Automatic control Internet Process control Systems engineering and theory Paper technology Industrial plants computerized monitoring

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Automated Open-Canal Water-Supply Systems

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IFAC Proceedings Volumes 2001年第3期34卷 189-194页

作者： Jovan D. Stefanovski Georgi M. Dimirovski HS Strezhevo Control & Informatics Div. 7000 Bitola R. Macedonia Dept. of Computer Engineering Faculty of Engineering Dogus University TR-81010 Kadikoy - Istanbul Turkey

This paper presents a feasible open-canal water-distribution control system based on the dynamic regulation principle and the theory of Kalman optimal controller. The existing nonlinear phenomena, as well as the transport delay phenomenon are accounted for. The obtained controller is simulated using the full Saint-Venant partial differential equations

关键词： computer simulation Kalman controller open-canal systems Saint-Venant equations

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On real-time control tasks schedulability 6

On real-time control tasks schedulability

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6th European control Conference, ECC 2001

作者： Marti, P. Villa, R. Fuertes, J.M. Fohle, G. Dep. of Automatic Control Universitat Politècnica de Catalunya Pau Gargallo 5 Barcelona08028 Spain Dept. of Computer Engineering Mälardalen Högskola PO Box 883 VästeråsSE-721 23 Sweden

ISBN: (纸本)9783952417362

In general, characteristics of classical control theory and properties of real-time scheduling algorithms may cause unexpected control system responses in the implementation of real-time computer-controlled systems. Revising realtime scheduling properties, we analyse which are the main timing problems that current scheduling algorithms may introduce in the execution of control loops. Next, we categorise those timing problems, that is, jitters on task-instances executions, in a control context. Afterwards, we show, by simulations, different types of control system performance degradation that these jitters may cause. Finally, we propose possible solutions that solves this degradation, based on irregular sampling discrete-time system models with varying time delays. © 2001 EUCA.

关键词： Real time control

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Hybrid leader-follower and fuzzy-Petri-net traffic rate control and supervision in network systems

Hybrid leader-follower and fuzzy-Petri-net traffic rate cont...

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5th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, TELSIKS 2001

作者： Dimirovski, G.M. Jing, Yuanwei Zhang, Siying Dept. of Computer Engineering Faculty of Engineeing DOGUS University Zeamet Sk. 21 TR-81010 Kadikoy-Istanbul Turkey Institute of Automation and Systems Engg. Faculty of Electical Engineering Methodius University MK-1000 Skopje Macedonia Institute of Control Theory School of Information Science and Engineering Northeastern University Shenyang Liaoning 110006 China

ISBN: (纸本)078037228X

This paper addresses networking and traffic control problems in network systems along with the potential for introducing soft-computing applications at supervisory control level. The incentive Stackelberg strategy control concept was introduced to the networking model that comprises subsidiary systems of users and of network. A linear strategy is proposed for the elastic traffic problem, and results are demonstrated and illustrated via Kelly's (1997) example. The presented method is extended to the non-elastic traffic problem and results are also illustrated via a slightly modified Kelly example. Ways of employing combined analytical and soft-computing approaches and techniques in a hybrid framework have been investigated. A fuzzy-Petri-net supervisor is proposed to implement the strategic decision and control layer. Insofar obtained results are rather encouraging, and this research continues further towards possible implementation as well as some open theoretical issues. © 2001 IEEE.

关键词： Game theory

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A Comparison of Optimal Iterative Learning control Schemes

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IFAC Proceedings Volumes 2001年第14期34卷 77-82页

作者： M. Rzewuski E. Rogers D.H. Owens Dept. of Electronics and Computer Science University of Southampton Southampton SO17 IBJ UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD UK

Recent years has seen much progress in the theory and application of iterative learning control schemes for both linear and (classes of) nonlinear dynamics. In the case of the former, many algorithms based on minimizing a suitable cost function have been reported. Here the interest is in the so-called norm optimal approach where the basic philosophy is to compute the control input on the current trial such that the tracking error is reduced in an optimal way without too much deviation from the control input used on the previous trial. This paper compares the performance of a range of controllers arising from use of the norm optimal approach - both stand alone and against alternatives.

关键词： iterative learning control optimal algorithms

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A public cryptosystem based on the generated data in extension set

A public cryptosystem based on the generated data in extensi...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Kaiquan Shi Yo-Ping Huang College of Control Science and Engineering Shandong University Jinan Shandong P.R.C Dept. of Computer Science and Engineering Tatung University Taipei Taiwan R.O.C.

ISBN: (纸本)0780370872

Assume X/sup #/ is an extension set in the domain U. Let X/sup A/, X/sup B/ be the positive domain of X/sup #/ in which X/sup A//spl sub/X/sup #/, X/sup B//spl sub/X/sup #/, and X/sup A//spl ne/X/sup B/. X/sup A/={x/sub 1//sup A/, x/sub 2//sup A/, ..., x/sub n//sup A/}, X/sup B/={x/sub 1//sup B/, x/sub 2//sup B/, ..., x/sub n//sup B/}. /spl forall/x/sub 1//sup A/, x/sub 1//sup B//spl isin/N/sup +/, |X/sup A/|/spl ges/4, |X/sup B/|/spl ges/4. By using the accumulated generating operation, we can obtain a mathematical model from X/sup A/ and X/sup B/. From the mathematical model we also derive the sets of X'/sub A/ and X'/sub B/. Both X'/sub A/ and X'/sub B/ are the extended domains of X/sup #/. There exist polynomials p/sup A/(x), p/sup B/(x); and p/sup AB/(x) from X'/sub A/, X'/sub B/, and X/sup AB/, respectively. Based on the p/sup A/(x), p/sup B/(x), and p/sup AB/(x), we propose a new public cryptosystem. In the presented system, we have a public cryptography system from generated data in extension set X/sup #/, a public cryptosystem from two generated data in extension set X/sup #/, and a public cryptosystem from hybrid generated data in extension set X/sup #/. The proposed model is a secure system. Both sides in the communication system can depend on the proposed cryptosystem to fulfill the cryptography of the to-be-transmitted file and de-cryptograph of the cryptograph.

关键词： Cryptography Mathematical model Set theory Hybrid power systems Information systems Information security Educational institutions Polynomials Communication systems Communication system security

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