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Benchmark Problems for computer-Aided control System Design

IFAC Proceedings Volumes 1988年第8期21卷 1-6页

作者： D.K. Frederick M. Rimer Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute Troy 12180 USA Stability Control and Flying Qualities Group B21-35 Grumman Aerospace Corporation Bethpage 11714 USA

The need for having benchmark problems for the evaluation of software for computer-aided control system analysis and design is discussed. The two benchmark problems that have been released to date by the Benchmark Working Group of the Technical Committee on computer-aided control System Design of the IEEE control systems Society are described, as are the plans for future problems. Information that has been learned about the preparation, distribution, and dissemination of results for this type of problem is included.

关键词： computer-aided design benchmark problems computer analysis computer programs control-system design

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An Integrated Approach to controls and Diagnostics: The 4-Parameter controller

An Integrated Approach to Controls and Diagnostics: The 4-Pa...

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American control Conference (ACC)

作者： C. N. Nett C. A. Jacobson A. T. Miller Control Systems Laboratory GE Corporate Research and Development Center Schenectady NY USA Department of Electrical and Computer Engineering Northeastern University Boston MA USA

In this paper we present a theoretical basis for an integrated approach to the design of reliable control systems. In this approach, the control and diagnostic modules of a reliable control system are designed together, instead of independently, thereby accounting for the interactions which occur between these two modules in a functioning reliable control system. The approach makes use of a significant generalisation of the familiar 2-parameter controller known as the 4-parameter controller. This controller has two vector inputs and not one, but two vector outputs; correspondingly, this controller is comprised of not two, but four matrix parameters. The additional controller output is monitored to detect and isolate sensor and actuator faults, thereby providing the controller with diagnostic capabilities, or "intelligence," in addition to its control capabilities. Using a parameterization of all stabilising 4-parameter controllers, the fundamental limitations and inherent tradeoffs governing the design of reliable control systems are clarly delineated, with special attention given the issues of uncertainty and control/diagnostic interaction. Several means for resolving these desig tradeoffs are proposed, and illustrated by way of non-trivial examples. These results are expected to pave the way for the achievement of improved overall control/dignostic performance in reliable control systems, and also to pave the way for the achivement of significant complexity reductions in both the design and implementation of reliable control systems.

关键词： control systems Fault detection Signal processing Research and development Jacobian matrices Reliability theory Monitoring Actuators Uncertainty Intelligent control

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Statistical Analysis of the Overdetermined Yule-walker Estimator of Frequencies of Multiple Sinusoids

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IFAC Proceedings Volumes 1988年第9期21卷 1035-1040页

作者： P. Stoica T. Soderstrom F.-N. Ti B. Friedlander Department of Automatic Control Polytechnic Institute of Bucharest Splaiul Independentei 313 R-77206 Bucharest Romania Automatic Control and Systems Analysis Group Department of Technology Uppsala University P.O. Box 534 S-751 21 Uppsala Sweden Automatic Control and Systems Analysis Group Department of Technology Uppsala University P.O. Box 534 S-751 21 Uppsala Sweden on leave from Department of Mechanical and Electrical Engineering Shandong College of Light Industry Jinan PRC Saxpy Computer Corporation 255 San Geronimo Way Sunnyvale CA 94086 USA

The estimation of sinusoidal frequencies by the overdetermined Yule-Walker (OYW) Method is considered. An explicit expression is derived for the asymptotic covariance matrix of the estimation errors. The effect of increasing the number of Yule-Walker equations on estimation accuracy is analyzed. The asymptotic estimation accuracy of the OYW method is compared to the best achievable accuracy corresponding to the Cramér-Rao bound

关键词： system identification parameter estimation sinusoidal frequencies Yule-Walker methods asymptotic distribution

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NTDS - A PAGE IN NAVAL HISTORY

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 53-61页

作者： SWENSON, EN MAHINSKE, EB STOUTENBURGH, JS Capt. Erick N. Swenson USNR (Ret.):is a project manager for special projects in the Surface Ship Systems Division Hughes Aircraft Company Fullerton Calif where he has been employed since his retirement from the U.S. Navy in 1975. Originally trained as an electronics technician during WWII in the Captain Eddy program he later received a BS degree in electrical engineering from the University of Rochester Rochester N. Y. in 1950. Subsequent engineering education was received at the University of Pittsburgh Pittsburgh Penn. and the Naval Postgraduate School Monterey Calif. After commissioning he was ordered to duty as the electronics division officer on the USSMissouri(BB-63) and electronics ships superintendent at Hunters Point Naval Shipyard San Francisco Calif. When the design of the Naval Tactical Data System began in the mid-1950s Lt. (j.g.) Swenson was ordered to the Bureau of Ships Navy Department Washington D.C. as the junior engineering duty only officer assigned to the project. From 1962 to 1965 LCdr. Swenson was assigned as the BuShips technical representative on the program at Remington Rand Univac St. Paul Minn. For the next ten years he returned to BuShips/NavSea/NAVSEC as the NTDS project officer. During this time the project expanded considerably foreign military sales were heavily involved and interoperability with other services and countries were established. His final effort on active duty was to instigate the redesign of the previousSpruanceclass destroyers into the newerAdmiral Kiddclass improvement program. He is a registered professional electrical engineer in the State of California listed inWho's Who in the Worldis a life member of ASNE and chairman of the Long Beach/Greater LA Section. Capt. Edmund B. Mahinske USN (Ret.):is an alumnus of the U.S. Naval Academy the Massachusetts Institute of Technology and the Harvard Business School. His technical background is in electronics and he specialized in the management of programs involving the application of comp

A little over thirty years ago, a group of naval engineers were assembled by the Bureau of Ships to develop a new system approach to the combat information center (CIC). The CIC of World War II, with its “grease pencil” plots and voice telling of tactical information from sensors and other ships, could no longer provide the timely, coordinated reaction to postwar threats. This project group led the Navy into the new world of large-scale, high-speed digital electronics and into a new mode of conducting naval warfare as well. There were no off-the-shelf computers of the requisite capability, size and reliability; what were available were monstrous vacuum tube computers. There were no display equipments that were “conversant” in both the digital language of the computer and the analog language of the sensors and the weapon systems. Who ever heard, at that time, of a computer running a tactical communication net automatically? It was hard enough to find sufficient numbers of engineers who knew what a digital computer was. This paper, by three naval engineers in the implementing engineering office, depicts the evolvement of the Naval Tactical Data systems (NTDS) as they saw it. It discusses the problems that stemmed from the transition from the old world of analog into the new digital world, the system concepts that steered the development; the key decisions that were made; new electronic equipment and processes that became necessary; and the need of the mangagement to face the real world of deadlines, ship schedules and operational requirements.

关键词： NAVAL WARFARE

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OPTIMUM HVAC-TRANSMISSION EXPANSION PLANNING

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INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY systems 1987年第1期9卷 29-44页

作者： GILLES, ML MEISEL, J Systems Control Inc. 1801 Page Mill Road Palo Alto CA 94303 USA Department of Electrical and Computer Engineering Wayne State University Detroit MI 48202 USA

A new, flexible, mixed-integer formulation is presented for solving the single-stage AC-transmission expansion planning problem. This new formulation handles the discrete nature of equipment additions without resorting to linearized incremental approaches, but still uses integer linear programming. Even the interconnection of an initially disjoint system is handled directly without resorting to an arbitrary initially connected system. The optimal configuration at the end of the planning step under consideration minimizes an annually amortized cost function including the investment cost for equipment additions and the operating cost in terms of real-power transmission losses. Using a new, efficient, linear load-flow model, the formulation developed here is characterized by a complete decoupling between real and reactive equations. Examples have been incorporated to illustrate the potentials of this new optimum planning formulation. A major contribution of this paper is in showing how the power system transmission expansion planning problem can fit into the standard, mixed-integer, linear programming format in both a conventional sensitivity formulation and also with our new implicit enumeration formulation.

关键词： expansion planning generation expansion transmission expansion

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Fundamentals of Practical controller Design for LTI Plants with Distributed Parameters: Part 1, Modelling and Well-Posedness

Fundamentals of Practical Controller Design for LTI Plants w...

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American control Conference (ACC)

作者： A.J. Helmicki C.A. Jacobson C.N. Nett Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY USA Department of Electrical and Computer Engineering Northeastern University Boston MA USA Control Engineering Branch General Electric Corporate Research and Development Center Schenectady NY USA

This paper addresses some fundamental concerns pertaining to the subject of practical controller design for LTI plants with possibly distributed parameters. The well-posedness of a general LTI model is introduced in terms of the existence of bandlimited stabilizing compensation for the given model. The well posedness of a model is critical from an implementation standpoint for the application of any model-based controller design methodology. The problem addressed in this paper is to characterize LTI distributed parameter models that are well posed with respect to bandlimited stabilising control. The problem is posed on a framework consisting of a novel class of convolution kernels and a completely general control system configuration. These two aspects of the problem formulation place no a priori restriction on the class of LTI distributed paramater systems under consideration or the control design methodology used. Indeed, this framework allows the modelling of LTI distributed parameter systems including point sensing, boundary actuation and effects of initial conditions. Within this framework the result obtained are algebraic in nature. A characterization of well-posed models is given in the form of necessary conditions for the existence of a bandlimited stabilizing controller. Also a restriction of the class of all linear distributed parameter systems under consideration is derived which exhibits this condition.

关键词： control systems Bandwidth Design methodology Convolution Distributed parameter systems Kernel Algebra Design engineering Jacobian matrices State-space methods

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An efficient linear method for ARMA spectral estimation

An efficient linear method for ARMA spectral estimation

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： R. Moses P. Stoica B. Friedlander T. Soderstrom Department of Electrical Engineering Ohio State Uinversity Columbus OH USA Department of Control and Computers Polytechnic Institute of Bucharest Bucharest Romania Saxpy Computer Corporation Sunnyvale CA USA Department of Automatic Control and Systems Analysis Institute of Technology Uppsala Uppsala Sweden

A three step method for obtaining nearly maximum likelihood ARMA spectral estimates is presented. The computational complexity of the algorithm is comparable to Yule-Walker methods, but the method gives asymptotically efficient estimates. The implementation of the algorithm is discussed, and numerical examples are presented to illustrate its performance.

关键词： Parameter estimation Covariance matrix Density functional theory Equations Bandwidth Maximum likelihood estimation Statistics Polynomials

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GRAFCET and SFC as Factory Automation Standards Advantages and Limitations

GRAFCET and SFC as Factory Automation Standards Advantages a...

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American control Conference (ACC)

作者： A.D. Baker T.L. Johnson D.I. Kerpelman H.A. Sutherland Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY USA Control Technology Branch General Electric Corporate Research and Development Center Schenectady NY USA

Two proposed programming standards for industrial automation, GRAFCET and SFC, are presented. The idea of what makes a `good' programming language is discussed, and the concept of a graphic programming language is introduced. The advantages and limitations of GRAFCET and SFC are presented. This paper concludes with a discussion of the need for further research for more general graphic programming languages for industrial automation.

关键词： Manufacturing automation Automatic control Programmable control computer languages Relays Electrical equipment industry Industrial control Graphics Costs Logic programming

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A SUFFICIENT CONDITION FOR OUTPUT-FEEDBACK STABILIZATION OF UNCERTAIN systems

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IEEE TRANSACTIONS ON AUTOMATIC control 1986年第11期31卷 1055-1057页

作者： ZEHEB, E Department of Electrical Engineering Technion-Israel Institute of Technology Haifa Israel Department of Electronic Communications Control and Computer Systems Faculty of Engineering Tel-Aviv University Tel-Aviv Israel

A sufficient condition is derived for the existence of an output constant gain feedback controller which stabilizes a single-input single-output dynamical system with a linear nominal part and matched uncertainties. The sufficient condition is significantly less restrictive than a recently derived one [1]. If such a controller exists, it may readily be computed.

关键词： Sufficient conditions Output feedback Uncertain systems Transfer functions Uncertainty Communication system control Military computing Robust control control systems Adaptive control

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An interactive control systems simulator

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IEEE control systems Magazine 1986年第2期6卷 20-26页

作者： K. Diehl B. Krogh M. Nagurka Department of Electrical and Computer Engineering Systems Control Technology Carnegie Mellon University Palo Alto CA USA Department of Mechanical Engineering Carnegie Mellon University Pittsburgh PA USA

An Interactive control systems Simulator (ICS) for control engineering education is presented. ICS contains an interactive block diagram editor with which arbitrary linear control systems can be constructed for a library of predefined nonlinear plants. The time response of the constructed system is simulated with animated graphics, and data can be collected for display with the ICS plotting facility. This paper describes the structure and use of ICS and presents two examples.

关键词： control system synthesis Interactive systems Displays Workstations control engineering control engineering education Linear feedback control systems

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