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A Description of an On-Line Statistical Quality control Package

IFAC Proceedings Volumes 1985年第13期18卷 9-16页

作者： J.R. Rushing SETPOINT Inc. 950 Threadneedle Suite 200 Houston TX 77079 USA

control charting and other statistical quality control techniques have been used by quality control departments in an off-line mode for many years, resulting in significant reductions in process variability. SETPOINT has developed an on-line statistical quality control package which employs these same techniques in real time. This package provides real-time statistical quality control functions such as control charting and alarming.

关键词： control engineering computer applications minicomputers on-line operation process control quality control

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Instructional computer Graphics in control System Design

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IFAC Proceedings Volumes 1979年第7期12卷 641-647页

作者： M.J. Wozny Interactive Computer Graphics Center Rensselaer Polytechnic Institute Troy New York U.S.A.

The world-wide demand for increased industrial productivity has created a critical need for engineers trained in computer graphics and computer-aided design. Rensselaer Polytechnic Institute is the first U.S. university to make a major commitment to computer graphics and CAD by establishing a 1.2 million dollar Center for Interactive computer Graphics in the School for Engineerina. This paper explores the role of interactive computer graphics for instruction and design in control, based on the experiences gained at RPI.

关键词： computer-aided design computer-aided instruction computer graphics control engineering computer applications educational aids feedback optimal control

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A Boiler-Turbine Mathematical Model for Power Plant Operation Studies

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IFAC Proceedings Volumes 1987年第9期20卷 681-686页

作者： R.T. Pena G.Y. Masada R.H. Flake Dept. de Engenharia Eletrônica Universidade Federal de Minas Gerais Rua Espirito Santo 35 30.000 Belo Horizonte MG Brazil Mechanical Engineering Department The University of Texas at Austin Austin TX 78712 USA Electrical Engineering Department The University of Texas at Austin Austin TX 78712 USA

A sixty-fifth order, nonlinear dynamic model of a 235 MW natural gas fired power plant was developed. The model includes all the major process components and the control system loops required for the normal operation of the plant. The process governing equations are derived from physical conservation laws with process parameters computed from construction drawings, material properties, and plant data. The control system models are derived from circuit diagrams with control parameters computed from the resistive and capacitive values of the components and the control settings. The model is coded in FORTRAN and runs 8.5 times faster than real time on the CDC Cyber computer. One of the unique features of the model is that in can be initialized directly from actual plant measurements using a 31st. order measurement vector to compute initial conditions. The validated model has been used do predict plant behavior under steady state and transient operations and in control system and operational optimization studies. This paper describes the main aspects of the model development.

关键词： Power Plant Modeling Power control Process control control engineering computer applications Steam Plants

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Training Simulators in Network control Centers

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IFAC Proceedings Volumes 1988年第11期21卷 501-507页

作者： E. Becker M. Eichner U. Koentge PSI GmbH. Boschweg 6 8750 Aschaffenburg FRG Sladwerke Düsseldorf AG Luisenstr. 105 4000 Düsseldorf AG FRG

As known from other applications, it will be necessary in network control centers also to use training simulators in future, in order to prepare the staff in reacting immediatly upon unexpected events, like breakdowns, with correct operations. At Stadtwerke Duesseldorf, W-Germany, such a training simulator is in realization. The network operating system is completed by an autonomous corrplex called network simulator. The main components of this simulator herein are described, and the principles of network simulator operation outlined. Simulating the network protection equipment has a special significance in connection with network simulators. Therefore the general concept of this subsystem and the simulation of some network protecting relay types are described. Activating and running a simulation are delineated. Additional information is given with regard to system realization. Concluding the paper some remarks are made concerning hardware and computing time as well as references to advantages in transaction for similar projects using a network simulator.

关键词： control engineering computer applications models network protection simulation power system control training simulator

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Slicot, A Subroutine Library in control and Systems Theory

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IFAC Proceedings Volumes 1991年第4期24卷 71-76页

作者： A. van den Boom A. Brown F. Dumortier A. Geurts S. Hammarling R. Kool M. Vanbegin P. Van Dooren S. Van Huffel Eindhoven University of Technology Eindhoven The Netherlands Numerical Algorithms Group (NAG) Ltd. Oxford UK State University of Ghent Ghent Belgium Philips Research Laboratory Belgium Louvain la Neuve Belgium Katholieke Universiteit Leuven Leuven Belgium

Past initiatives with respect to realising control libraries are analyzed. A new collaborative initiative is introduced. The design of a new control library SLICOT is presented and the first release of this library is... 详细信息

关键词： computer-aided control system design interactive computing control engineering computer applications control libraries

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applications of a Distributed computer System for Batch Process

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IFAC Proceedings Volumes 1981年第2期14卷 2881-2886页

作者： N. Ohashi T. Itoh Engineering Division Mitsubishikasei Techno-engineering Ltd. 2-1-30 Shiba Minatoku Tokyo Japan Engineering Department Mitsubishi Chemical Industries Ltd. (Kurosaki Works) Kurosaki Yahata Nishi Ku Kita Kyushu Fukuoka Prefecture Japan

Conventional analog instruments fail to achieve a satisfactory automatic control system for an automated batch system in which transient states are encountered and frequent alterations of type and/or grade vary the nature of the operations. The authors obtained even better results than expected by employing a distributed computer system in batch control. This paper presents the related hard-and software details together with an outline description of the type and/or grade control system, improved controlability, countermeasures against erroneous operations, and results given by the new system.

关键词： Centralised plant control chemical industry control engineering computer applications digital computer application direct digital control distributed computer control system batch process control process control

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An electrode controller for Submerged Arc Furnaces

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IFAC Proceedings Volumes 1980年第7期13卷 611-621页

作者： I.J. Barker Instruments Division National Institute for Metallurgy Private Bag X3015 Randburg 2125 South Africa

A new type of automatic electrode controller for submerged-arc furnaces has been developed by the National Institute for Metallurgy (NIM), in response to the need for some means of overcoming the problems that are experienced on large submerged-arc turnaces. This paper deals with the development of the algorithm for the prototype unit. The exact nature of the problem with conventional electrode control is explained, and the operation of the prototype unit is described.

关键词： control engineering computer applications Ferro-alloys Steel industry Electrodes Process control Microprocessors Optimal control

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A New control Technique for Cross Machine control of Basis Weight

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IFAC Proceedings Volumes 1983年第21期16卷 175-182页

作者： A.J. Wilkinson A. Hering AccuRay Co. High Wycombe Buckinghamshire UK AccuRay Co. Columbus Ohio USA

Recent advances in automatic control theory have led to the development of self tuning regulators - regulators which adapt to the process they are controlling to produce the best control. One of the most interesting applications of self tuning regulators has been in the field of cross machine basis weight control on a paper machine. Process control systems which perform cross machine basis weight control using self tuning regulation techniques are now in routine use both in Western Europe and North America. This paper covers the following topics in relation to the cross machine control of basis weight using self tuning regulator techniques 1. The operating principles used in the control system. 2. A review of the actuators currently in use or under development for moving the paper machine slice lip. 3. Results from operating systems

关键词： Paper industry weight control cross machine direction control engineering computer applications self adjusting systems robots

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Hierarchical Structure with Repetitive Goal Coordination for Real-time Flood control in a Multireservoir System

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IFAC Proceedings Volumes 1985年第14期18卷 111-119页

作者： K. Malinowski A. Karbowski Institute of Automatic Control Technical University of Warsaw ul.Nowowiejska 15/19 00-665 Warszawa Poland

The paper presents a hierarchical control structure for real time flood control in a multireservoir system. The aim of the structure is to minimize the flood damages which depend on the peak water levels at the most important locations situated far downstream the reservoirs. Water releases form the individual reservoirs are adjusted by the local operators while the objective of a central authority is to modify local performance functions so as to achieve his overall goals. Due to highly uncertain forecasting of future inflows the decision mechanism of a central dispatcher is based upon fast simulation of the system operation under different flow scenarios. An application of the control structure to a case study multireservoir system is shortly described together with some selected simulation results.

关键词： Analog computer applications control engineering computer applications control system synthesis flood control hierarchical systems large-scale systems on-line operations optimal control water resources

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Application of the Identification Techniques to the Ship System

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IFAC Proceedings Volumes 1978年第1期11卷 1583-1588页

作者： A. Tiano E. Volta Ship Automation Laboratory National Council of Researches Genoa Italy Department of Electrical Engineering Genoa University Ship Automation Laboratory National Council of Researches Genoa Italy

This paper seals with the identification experiments carried out in the recent vears by the L.A.N. (Ship Automation Laboratory) for determining a suitable mathematical model of the ship steering dynamics. Some basic concepts concerning the mathematical models are discussed, and the experimental methods as well as the results achieved by sea—trials performed on board of two shies with definitely different characteristics are presented. Such results, obtained after analysing a very large member of fall-scale experiments, confirm the adequacy of an A.R.M.A. model for describing the ship steering process.

关键词： Identification stochastic systems control engineering computer applications guidance systems ships

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