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Regulation of a Steam-generator in an Adaptive Multivariable Way

IFAC Proceedings Volumes 1985年第11期18卷 229-233页

作者： E. Fenet D. Meizel Société Francaise Pétroles BP Raffinerie de Dunkerque BP 4-519 59140 Dunkerque France Laboratoire d'Automatique et d'informatique Industrielle Institut Industriel du Nord BP 48 59651 Villeneuve d'Ascq Cédex France

This paper presents the realization of the control of a two–inputs–two–outputs process by use of both classical PI controllers together with an adaptive decoupling precompensator. The control–law is implemented on a decentralized–microprocessor–based industrial process–control system that has been conceived essentially for fixed–gains regulators. From the difficulties we met in the implementation, we propose some specifications to increase flexibility of programming for industrial–process–control systems.

关键词： control engineering computer applications multivariable control systems adaptive control heat systems

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computer Aided Design of Ship control Systems

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IFAC Proceedings Volumes 1985年第8期18卷 349-352页

作者： J.van Amerongen P.P.J.van den Bosch Control Group Electrical Engineering Department Delft University of Technology The Netherlands

At the control Laboratory of the Electrical engineering Department of Delft University of Technology much research has been carried out during the last fifteen years in the field of ship control systems, with the main emphasis on automatic steering of ships. This work has resulted In the design of an adaptive autopilot (Van Amerongen, 1984). At the moment research is concentrated on the design of an autopilot which uses the rudder not only for course keeping but for stabilization of the roll angle as well. This paper demonstrates how modern computer-aided design methods may help in designing such a system, especially when analytical methods fail because of non-linearities of the process.

关键词： computer-aided design computer-aided system design control engineering computer applications Ships Steering machine

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Robots and Mining: The Present State of Thought and Some Likely Developments

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IFAC Proceedings Volumes 1985年第6期18卷 31-33页

作者： M, Kassler Michael Kassler and Associates Pty Limited Suite 2 2 West Crescent Street McMahons Point NSW 2060 Australia

Two recently published studies have considered whether and how robots, which have been designed for manufacturing applications, could find use in mining. The conclusions of both studies, if not identical, are compatible. Automation of mining activities will continue. Robots, at least in the short term, will have little application in mining. However, robotic concepts, both hardware and software, are of considerable relevance to mining automation, and can be anticipated to diffuse gradually into mine environments. The present paper is intended to convey the current state of thought on this subject to IFAC Symposium participants who may be unfamiliar with the referenced studies, and is not intended to report previously unpublished research

关键词： Robots mining control engineering computer applications pattern recognition telecontrol man-machine systems

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Industrial applications in the Netherlands of computer-Aided Design Packages for control Systems: Trends and Practice

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IFAC Proceedings Volumes 1985年第8期18卷 65-68页

作者： P.P.J. van den Bosch A.J.W. van den Boom Delft University of Technology. Department of Electrical Engineering PO Box 5031 2600 GA Delft The Netherlands Eindhoven University of Technology Department of Electrical Engineering PO Box 513 5600 MB Eindhoven The Netherlands

In this paper we will describe and illustrate some applications of CACSD packages in Dutch industry. Some typical usages of CACSD in industry will be illustrated. Further we will analyse the results of an inquiry with respect to the use and need for CACSD in industry and universities which was held in 1982/1983 in the Benelux and we will resume the activities of a working group in the Benelux which aims to promote CACSD

关键词： computer-aided design computer-aided control system design computer control control engineering computer applications Identification System Analysis

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Dynamic Analysis of the Air Gas Path of Fossil Fuel Power Plants

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IFAC Proceedings Volumes 1984年第3期17卷 29-36页

作者： D. Corno S. Quatela A. Zizzo ANSALDO BREDA Department Viale Sarca 336 20126 Milano Italy ENEL Italian Electricity Board R & D Dept. Automation and Computing Research Center Via A. Volta 1 20093 Cologno Monzese Italy

In this work a dynamic analysis for the air-gas path of a balanced draft boiler is presented. As is well known, in this part of the plant large and rapid pressure variations can arise in particular situations (for instance in case of fuel trip) which can cause damage to mechanical structures. To achieve a basis of evaluation of these phenomena, a mathematical model of the air-gas system has been developped; the system has been divided into subsystems (fans, air and gas ducts, furnace, air preheaters, dampers) and for each of them a first principles mathematical model has been written. The submodels have then been coupled together to obtain the description of the whole system. This task has been accomplished automatically by means of a suitable “computer aided modelling” code, described in detail in (Marcocci and Spelta, Owing to this modular approach, a wide range of possible plant configurations can be represented. This paper first describes the models of the principal subsystems and the criteria which have been followed to represent with acceptable accuracy the main phenomena involved; a practical application to the air gas path of a real power plant in then presented, and the results obtained in the most critical situations are discussed, with particular attention to operating strategies and control system evaluation.

关键词： Power generation modular modelling air-gas path dynamic response control engineering computer applications pressure control

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Development of Strip Temperature control for the Continuous Annealing and Processing Line

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IFAC Proceedings Volumes 1984年第2期17卷 1725-1730页

作者： K. Yui T. Sato H. Ikegami K. Suehiro Electrical Automation and instrumentation division Plant Engineering and Technology Bureau Nippon Steel Corporation 6-3 Otemachi 2-chome Chiyoda-ku Tokyo 10 Japan Rolling Plant Engineering Division-II Plant Engineering and Technology Bureau Nippon Steel Corporation 6-3 Otemachi 2-chome. Chiyoda-ku Tokyo 100 Japan Engineering and Design Office Hirohata Works Nippon Steel Corporation 6-3 Otemachi 2-chome. Chiyoda-ku Tokyo 100 Japan

Recently five conventional batch processes after the cold rolling process have been replaced by the continuous annealing and processing line (C.A.P.L.) for cold rolled sheets of mild steel and high strength steel in order to obtain higher productivity, labor savings, energy savings and the manufacture of new products. In this remarkable process, the strip heat cycle must be mainteined at a target strip temperature from the metallurgical point of view. This paper covers the process computer control system of the C.A.P.L., the strip temperature control system which utilizes a Kalman-Bucy filter, and the adaptive control method for improving the control performance of the strip temperature control system.

关键词： Steel industry control engineering computer applications Temperature control Optimal filtering Adaptive control

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Multiloop controls and State Feedback controls for Weakly Damped Hydraulic Drives

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IFAC Proceedings Volumes 1984年第2期17卷 2797-2802页

作者： S. Faulhabe H. Bültges H. Rake Institut für Regelungstechnik der RWTH Aachen Steinbachstr. 54 D-5100 Aachen Federal Republic of Germany

Electro-hydraulic servo-drives are used advantageously in manufacturing industry because of their great actuating power. The characteristic weak damping of such drives, however, complicates the design of an appropriate control considerably. This paper describes an investigation of the design of linear feedback controls for servo-valve-controlled hydraulic drives. Multiloop controls as well as state feedback controls are tested by means of a nonlinear model of a hydraulic drive and the results of a hybrid simulation study are presented. The aim of the investigations was to explore the dynamic behaviour of state feedback controls and to compare the results with those of conventional cascade feedback controls.

关键词： Hydraulic systems Industrial control State-space methods Observers Cascade control control engineering computer applications

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A Decoupled Optimal Power Flow Approach Using Fletcher's Quadratic Programming Method

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IFAC Proceedings Volumes 1984年第2期17卷 2145-2150页

作者： Fu Shu-Ti Yu Er-Keng Zhang Xiao-Feng Electric Power Research Institute Qinghe Beijzng The People's Republic of China

In this paper a decoupled OPF approach using Fletcher's QP metnod is proposed. A Compact, decoupled model with active ana reactive optimization is derived. In p-model, a very sparse scheme is used as the equality constraints. In Q-model, transmission losses are expressed as deviation of swing generation. Consequently botn tne memory requirement and computation time can be significantly reduced. 5 test systems have been used to test tne effectiveness of this approach. It has been snown by test results that tnis UPF approach is faster and requires less memory that NLP method and other QP methods.

关键词： Power system control optimization optimal search techniques quadratic programming control engineering computer applications

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Estimating The Development Effort for a Large Process controls Application Software Project

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IFAC Proceedings Volumes 1984年第2期17卷 1917-1922页

作者： G.P. Benincasa A. Daneels P. Heymans Ch. Serre European Organization For Nuclear Research CERN Ch-1211 Geneva 23 Switzerland

This paper presents the economics of the application software developed for a large process control system. The structure of the application software will be discussed in both a technical and economical perspective, and assessed with Barry Boehm's development cost estimating formalism. The results will be compared with the in-house estimates and the actual costs.

关键词： control engineering computer applications economics process control

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Designing to Ensure the Safety of Operation in Automated Plants

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IFAC Proceedings Volumes 1984年第2期17卷 1777-1781页

作者： D. Balzer B. Böhme V. Kirbach Leipzig University of Technology 7030 Leipzig. Karl-Liebknecht-Strasse 132. German Democratic Republic

It ia the task of a system ensuring the safety of operation to minimize the effects of uncontrollable disturbances. To ensure the safety of operation in a production process includes the following items: detection of dangerous situations realization of a strategy against these dangerous situations A main point is the design of the technological (hardware) and algorithmic (software) structure of the system ensuring the safety of operation on the basis of modern measuring and process computer systems. The author represents examples for designing systems to ensure the sequence of operation in a process.

关键词： control engineering computer applications centralised plant control hierarchical systems reliability theorie system failure and recovery

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