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MASTER ORDNANCE REPAIR APPLIED - STANDARD ITEM 009-67

NAVAL ENGINEERS JOURNAL 1986年第3期98卷 35-42页

作者： STIMSON, WA MARSH, MT UTTICH, RM William A. Stimsonreceived his B.S. degree in mathematics from the University of Texas at El Paso in 1964 and his M.S. degree in engineering from the University of Santa Clara in 1971. He served in the U.S. Army Artillery during the Korean Conflict and subsequently was employed at IBM Huntsville Alabama until 1968 where he worked in the design of automatic control systems of the Saturn vehicle. From 1968 until 1971 he was employed at Ames Research Center Moffett Field in the design of nonlinear control systems for sounding rockets and pencil-shaped spacecraft. Following this Mr. Stimson worked at Hewlett Packard Sunnyvale California as a test engineer in automatic test systems. Since 1973 Mr. Stimson has been employed at the Naval Ship Weapon Systems Engineering Station Port Hueneme. He was a ship qualification trials project supervisor for many years and is now serving as master ordnance repair deputy program manager. Mr. Stimson is a member of the American Society of Naval Engineers and is program chairman of the Channel Islands Section. Cdr. Michael T. Marsh USNreceived a B.S. in mathematics from the University of Nebraska and was commissioned via the NESEP program in 1970. He holds an M.S. in computer science from the U.S. Navy Postgraduate School and an MBA from the State University of New York. Cdr. Marsh has served in the weapons department of USSFrancis Hammond (FF-1067) and of USSJohn S. McCain (DDG-36). He was weapons officer aboard USSSampson (DDG-10). As an engineering duty officer Cdr. Marsh was the technical design officer for PMS-399 at the FFG-7 Class Combat System Test Center from 1978 to 1982. He is presently combat system officer at SupShip Jacksonville and has been active in the MOR program since its inception. Cdr. Marsh is also the vice chairman of the Jacksonville Section of ASNE. LCdr. Richard M. Uttich USNholds B.S. and M.S. degrees in mechanical engineering from Stanford University. He enlisted in the Navy in 1965 serving as an electronics technician aboard USSNereus (A

The 600-ship United States Navy offers private shipyards an unprecedented opportunity for overhaul of surface combatants with complex combat systems. Recognizing the new challenge associated with the overhaul of high technology combat systems in the private sector, the Navy in 1983 established the master ordnance repair (MOR) program. This program, a joint effort of the Naval Sea systems Command (NAVSEA) and the Shipbuilders Council of America (SCA), was designed to identify and qualify those companies and private shipyards technically capable of managing combat systems work and conducting combat system testing. Standard Item 009–67 describes the role of the MOR company in combat system overhaul. It defines terms that are important to understanding the item itself, and imposes upon the prime contractor an obligation to utilize the MOR subcontractor in a managerial capacity. Specific tasks are assigned to the MOR company in planning, production, and testing. Finally, this standard item describes to the Navy planner how to estimate the size of the MOR team appropriate to the work package, a feature that will ensure that combat system bids are tailored to a specific availability.

关键词： WARSHIPS

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Algebraic aspects of linear control system stability

Algebraic aspects of linear control system stability

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IEEE Conference on Decision and control

作者： Carl N. Nett Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY USA Corporate Research & Development Center Control Technology Branch General Electric Company Limited Schenectady NY USA

In this paper the problem of linear control system stability is formulated in very general terms and then resolved by (i) establishing a necessary and sufficient condition for stability, (ii) exploring in some detail the nature of this condition, and (iii) developing a parametric characterization of all controllers which stabilize a given plant. The problem formulation developed herein is based on a ring theoretic setting for linear systems, and is distinguished by the use of a novel control system configuration. Any interconnection of two distinct systems can be represented in terms of this configuration while preserving the distinction between the two systems. Moreover, no other configuration has this property. Benefits and extensions accrued as a result of this property are thoroughly discussed, as are some promising directions for future research.

关键词： control systems Stability

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Uncertainty in Sampled systems

Uncertainty in Sampled Systems

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American control Conference (ACC)

作者： Charles E. Rohrs Gunter Stein Karl J. Astrom Department of Electrical Engineering University of Notre Dame Notre Dame IN USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA Systems and Research Center Honeywell Inc. Minneapolis MN USA Department of Automatic Control Lund Institute of Technology Lund Sweden

The recently obtained evidence of the need for a positive real element in an adaptive system leaves us with a disturbing gap in adaptive control theory. It is a fact that in some applications adaptive controllers are performing well in practice. How can these systems behave well in practical situations which must contain modeling error? This paper introduces a preliminary result which indicates that it may be possible to maintain the needed positive real system in the presence of modeling error. The result shows that if a continuous-time system with large high frequency uncertainty is treated appropriately with antialiasing filters and sampled slowly enough, the resulting discrete-time system may contain very little uncertainty. With small enough uncertainty in the plant, a positive real system in the adaptive loop is possible.

关键词： Uncertainty Adaptive control Adaptive systems Programmable control Filters Stability Sampling methods Frequency response Adaptive algorithm Sampled data systems

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A Practical Robustness Theorem for Adaptive control

A Practical Robustness Theorem for Adaptive Control

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American control Conference (ACC)

作者： Charles E. Rohrs Gunter Stein Karl J. Astrom TelLaboratories Research Laboratory South Bend IN and Department of Electrical Engineering University of Notre Dame Notre Dame IN USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA Systems and Research Center Honeywell Inc. Minneapolis MN USA Department of Automatic Control Lund Institute of Technology Lund Sweden

In this paper, two theorems are quoted which, when applied together, provide much information about the robustness of adaptive control schemes. From these two theorems, another theorem is developed which can explain why adaptive controllers can perform robustly in certain practical situations, while possibly failing in other situations. In particular, if the bandwidth constraints on a control systems are lenient enough to allow the use of a sampling frequency which is smaller than the frequency at which unstructured uncertainty becomes significant, an adaptive controller can behave robustly. Many, if not all, of the applications of adaptive control which have been successful employ relatively slow sampling of the process. Thus, the results of this paper provide a theoretical explanation of how certain adaptive controllers are performing robustly in practice. In addition, the final theorem is of a form which provides insight into what a priori knowledge is required to achieve robust adaptive control and how this knowledge say be used.

关键词： Robust control Adaptive control Uncertainty Frequency Sampling methods Programmable control control systems Transfer functions Automatic control Bandwidth

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AN APPROACH TO NONLINEAR FEEDBACK-control WITH APPLICATIONS TO ROBOTICS

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IEEE TRANSACTIONS ON systems MAN AND CYBERNETICS 1984年第6期14卷 879-884页

作者： GILBERT, EG HA, IJ Department of AeroSpace Engineering Robot Systems Division University of Michigan Ann Arbor MI USA Computer Information and Control Engineering Program Robot Systems Division College of Engineering University of Michigan Ann Arbor MI USA

A control problem involving a mechanical system with generalized coordinates q ∈ R m is considered. The error in tracking a desired input y d ∈ R p is e = E (q,y d )∈ R m . If E satisfies simple conditions, it leads to a nonlinear control law that assures e (t)→0 as t →∞. The law is robust in that small changes in it do not produce large steady-state errors or loss of stability. In this theory a unified framework is presented for treating a number of problems in the control of mechanical manipulators.

关键词： Manipulators Measurement uncertainty Vectors Joints Approximation methods Feedback control

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Comparative evaluation of a new procedure for adaptive estimation of noisy images

Comparative evaluation of a new procedure for adaptive estim...

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

作者： Zhang Pu H. Kaufman Beijing Institute of Information and Control Beijing China Electrical Computer & Systems Engineering Department Rensselaer Polytechnic Institute Troy NY USA

A new iterative adaptive image restoration algorithm is developed. It is composed of a sub-optimal filter and a least squares based identifier. To account for nonstationarity, a moving window technique has been incorporated. Based upon computational results on two noisy images and a comparison with three other adaptive image restoration algorithms, it was concluded that the proposed adaptive image estimation algorithm is highly competitive.

关键词： Adaptive estimation Autoregressive processes Image restoration Iterative algorithms Filters Mathematical model Pixel Equations Least squares methods Interpolation

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Large Scale systems Applications

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IFAC Proceedings Volumes 1984年第2期17卷 1235-1242页

作者： M.G. Singh M.S. Mahmoud M.F. Hassan Control Systems Centre UMIST P.O. Box 88 Manchester M60 1QD UK Electrical and Computer Engineering Department Kuwait University P.O Box 5969 Kuwait Electronics and Communication Engineering Department Cairo University Giza Egypt

An overview of system applications using large-scale modelling, optlmlsation and control methods is presented. The method used includes both hierarchical and dec entralised control. The applications are drawn from the fields of power systems, biological processes, water distribution networks, urban traffic control, telecommunication networks, river pollution control and a ship system.

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The Impact of Microcomputers on Society

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IFAC Proceedings Volumes 1984年第2期17卷 3519-3519页

作者： Naresh K. Sinha T. Vamos Fred Marguiles Madan M. Gupta Department of Electrical and Computer Engineering McMaster University Hamilton Canada Computer & Automation Institute Budapest Hungary Vienna Technical University Vienna Austria Systems and Adaptive Control Laboratory University of Saskatchewan Saskatoon Canada

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AN ADVANCED METHODOLOGY FOR PRELIMINARY HULL FORM DEVELOPMENT

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NAVAL ENGINEERS JOURNAL 1984年第4期96卷 147-161页

作者： LIN, WC DAY, WG HOUGH, JJ KEANE, RG WALDEN, DA KOH, IY Wen-Chin Lin:heads the Ship Powering Division at the David Taylor Naval Ship R&D Center (DTNSRDC). Dr. Lin received his B.S. degree in mechanical engineering from the National Taiwan University in 1957. He was awarded his M.S. degree in naval architecture and Ph.D. in engineering science from the University of California at Berkeley in 1963 and 1966 respectively. From 1966 to 1969 he was employed by ESSO Research and Engineering Company to conduct marine hydrodynamic research for oil tankers and offshore structures. Since joining DTNSRDC in 1969 he has actively conducted and directed hydrodynamic research to advance naval ship design technology and improve ship performance. Active in national and international symposia on ship hydrodynamic research he is recognized for contributions to the ship research community. For the past six years he has been a member of the Performance Committee of the ITTC and currently serves as secretary of the committee. He is a member of SNAME and the Society of Naval Architects of Japan. William G. Day Jr:. has been employed as a naval architect at the David Taylor Naval Ship R&D Center since receiving a B.E.S. degree from the Johns Hopkins University in 1966. He obtained an M.S. E. degree from George Washington University in 1971. As Head Design Evaluation Branch of the Ship Performance Department he is responsible for model experiments to evaluate the hydrodynamic performance of ships and propulsors. He is a member of ASNE and SNAME. In-Young Koh:received his B.S. and M.S. degrees in electrical engineering from Lowell University in 1969 and 1971 respectively and his Ph.D. in applied mechanics from Rensselaer Polytechnic Institute in 1976. Dr. Koh joined DTNSRDC as an electronic engineer specializing in the application of advanced instrumentation and computer techniques to ship research and design. He is currently engaged in research and development of active control systems for naval ship applications. Dr. Koh is a member of ASNE SNAME and IEEE. David Andrew Walden:is

A ship design methodology is presented for developing hull forms that attain improved performance in both seakeeping and resistance. Contrary to traditional practice, the methodology starts with developing a seakeeping-optimized hull form without making concessions to other performance considerations, such as resistance. The seakeeping-optimized hull is then modified to improve other performance characteristics without degrading the seakeeping. Presented is a point-design example produced by this methodology. Merits of the methodology and the point design are assessed on the basis of theoretical calculations and model experiments. This methodology is an integral part of the Hull Form Design System (HFDS) being developed for computer-supported naval ship design. The modularized character of HFDS and its application to hull form development are discussed.

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Development of an interactive graphical user interface for the UMIST control design suite

Development of an interactive graphical user interface for t...

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IEEE Conference on Decision and control

作者： Dean K. Frederick Neil Munro Peter Putz Dieter Platzer Electrical Computer and Systems Engineering Department Rensselaer polytechnic Institute Troy NY USA Control Systems Centre UMIST (University of Manchester Institute of Science and Technology) Manchester UK

A collaborative effort has been undertaken at both UMIST and Rensselaer to use interactive computer graphics to develop an improved user interface for the UMIST suite of programs for performing analysis, design, and synthesis of control systems. The objective is to explore ways in which presently available and newly emerging interactive graphics terminals can be employed with this specific suite and with control design packages in general. This paper is a presentation of the plans for this project and a report on its progress to date.

关键词： Graphical user interfaces control design User interfaces

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