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ROBUST SPECIFICATION INFLUENCE ON FEEDBACK control STRATEGIES

IFAC Proceedings Volumes 2002年第1期35卷 425-430页

作者： M. Gil-Martínez M. García-Sanz System Engineering and Automation Group Electrical Engineering Department University of La Rioja. Luis de Ulloa 20 26004 Logroño SPAIN Automatic Control and Computer Science Department Public University of Navarra. Campus Arrosadía 31006 Pamplona SPAIN

The feedback control structures are required in the presence of any kind of uncertainty. The benefits of the feedback are mainly paid with an excessive bandwidth that amplifies the sensor noise, saturating the actuators. This implies the necessity of design tradeoffs highly transparent from the Quantitative Feedback Theory. Supposing a given uncertainty for a plant, the set of performance and stability requirements will condition the problem solution. Taking advantage of the QFT bound typology and formulation, the contribution of the robust specification values to their simultaneous achievement will be analysed and particularly as regards the challenging task of the controller design.

关键词： Robust control Uncertain dynamical systems Quantitative Feedback Theory

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Initial state compensation of repetitive controller

Initial state compensation of repetitive controller

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Proceedings of the 3th World Congress on Intelligent control and automation

作者： Xu, Guangjie Bian, Runqiang Li, Yusen Wang, Zhimin She, Jin-Hua Nakano, Michio Department Automation Tianjin Institute of Technology Tianjin 3000191 China Mechatronics Department Tokyo Engineering University 1404-1 Katajura Hachioji Tokyo 192 Japan Dept. of Control System Engineering Tokyo Institute of Technology 2-12-1 Oh-Okayama Meguro-Ku Tokyo 152 Japan

A design approach of the initial state of the repetitive controller is proposed in this paper. The approach makes full use of the feature of the digital controller and optimizes the transient response without perplexi... 详细信息

关键词： Digital control systems

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Initial state compensation of repetitive controller

Initial state compensation of repetitive controller

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World Congress on Intelligent control and automation (WCICA)

作者： Xu Guangjie Bian Runqiang Li Yusen Wang Zhimin She Jin-Hua M. Nakano Department Automation Tianjin Institute of Technology Tianjin China Mechatronics Department Tokyo Engineering University Hachioji Tokyo Japan Department of Control System Engineering Tokyo Institute of Technology Meguro Tokyo Japan

关键词： control systems Digital control Transient response Automatic control Delay effects Performance analysis State-space methods Design automation Electronic mail Computer industry

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Interactive on-line evaluation of robot motion control

Interactive on-line evaluation of robot motion control

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IEEE Conference on control Technology and Applications (CCTA)

作者： A. Valera A. Robertsson K. Nilsson R. Johansson Department of System Engineering & Automation Valencia Technical University Valencia Spain Department of Automatic Control Lund Institute of Technology Lund University Lund Sweden Lund Institute of Technology Department of Computer Science Lund University Lund Sweden

This paper presents a new real-time architecture for motion control of industrial robots. The new control system obtained has two main advantages: first it provides a total open control architecture and the second advantage is the simplicity and the interactivity of the platform developed. Experimental evaluation of a passivity-based control scheme shows the benefits of the architecture which is unique in the sense that open and advanced control can be combined with built-in safety logic as required in industrial applications.

关键词： Robot motion Motion control Robot control Industrial control control systems Electrical equipment industry Service robots Robot sensing systems Safety Logic

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Effects of Instrumentation system Dynamics on PI-controller Tuning - A Case Analysis

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IFAC Proceedings Volumes 1998年第20期31卷 75-78页

作者： Riku Jäntti Heikki Koivo Control Engineering Laboratory Department of Automation and System Technology Helsinki University of Technology PO Box 3000 FIN-02105 TKK

Present-day automation systems effects greatly the dynamics of control loop. New "intelligent" actuators and transmitters do internal signal processing and therefore have their own independent micro processors. Because the clocks of those independent processors are not synchronised it gives rise to additional delays. Also the field and system buses may introduce extra communication delays. This will cause increasing problems in tuning controllers properly. In this paper one case analysis is presented where the effects of delays is emphasised. Comparison of several well-known tuning methods was carried out. It was found out that robustness of the tuning methods is essential in order to guarantee stability of the system.

关键词： Actuators Asynchronous sequential automation A/D converters D/A converters PI controllers Sampling systems Transmitters

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Neural Network Modelling and control of Parameter Depending Metallurgical Plants

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IFAC Proceedings Volumes 1998年第23期31卷 375-380页

作者： M. Hadjiski I. Kalaykov St. Mollov Chemical Technology and Metallurgy University Department of Automation Sofia - 1756 Bulgaria University of Tromsø Department of Physics N-9037 Tromsø Norway Technical University of Sofia Department of Control and System Engineering Sofia – 1756 Bulgaria

A class of metallurgical plants the dynamical models of which depend on measurable external or internal process parameters, are considered in the paper. A new approach for modelling of these plants is proposed by neural networks. Both direct and indirect learning schemes are developed combined with an evolutionary identification for compact and gain-scheduled Neural Networks (NN) model design. Comparative analysis is carried out of studied NN depending on parametric disturbance time characteristics, availability to maintain special operation conditions, learning time, accuracy. Dynamic NN model based predictive control (NNMBPC) scheme is proposed in case with fast parametric disturbance deviations. A case study of a NNMBPC of a muffle continuos patenting furnace is considered.

关键词： neural networks parameter depending plants modelling gain scheduling patenting furnace

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Stability analysis of a kind of large-scale systems composed of symmetrically coupled subsystems

Stability analysis of a kind of large-scale systems composed...

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1997 American control Conference

作者： Gao, LQ Leng, KP Zhang, SY Department of Automatic Control Northeastern University Shenyang Liaoning China Open Laboratory of Complex System Engineering Institute of Automation Academia Sinica Shenyang Liaoning China

This paper discusses stability for a class of symmetric composite systems. For the asymptotical stability of the overall system without control a necessary and sufficient condition is given, It is shown that Lyapunov ... 详细信息

ISBN: (纸本)0780338332

关键词： large-scale systems asymptotic stability linear systems Lyapunov methods matrix algebra control system analysis large-scale systems symmetrically coupled subsystems asymptotic stability necessary condition sufficient condition Lyapunov function linear systems matrix algebra

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Developing a prototype concurrent design tool for composite topside structures

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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Influence of human engineering on manning levels and human performance on ships

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NAVAL ENGINEERS JOURNAL 1997年第5期109卷 67-76页

作者： Anderson, DE Oberman, FR Malone, TB Baker, CC David E. Anderson:has a bachelor of science degree in environmental engineering from Florida Technological University and a master's degree in environmental engineering from the University of Central Florida. He is a graduate of the Naval Sea Systems Command's Engineer-In-Training (EIT) Program. Mr. Anderson was instrumental in introducing the collective protection system (CPS) in the U.S. Navy developing the initial forward-fit package for the USS Gunston Hall and the engineering change proposal (ECP) for the USS Wasp. In 1990 he joined the Human Systems Integration (HSI) Division (SEA 55W5) where he was task leader for auxiliary ships. He is currently the HSI manager for the future technology variant of the SeaLift ship and the future carrier. Association of Scientists and Engineers 33rdAnnual Technical Symposium 26 April 1996. Fred R. Oberman:has B.A. and M.A. degrees from the University of Chicago and Loyola University (experimental psychology) and an M.S. degree in industrial engineering and operations research from Virginia Polytechnic Institute (VPI). He has more than 30 years experience in HSI management planning research analysis design and testing in government and private sector positions. He is currently responsible for NavSea HSI generic research and tool development efforts. He is responsible for Human Engineering Specifications and Standards (Commercial Hypertext) and is the NavSea 03D7 representative on HSI in Performance Specifications and for integration of HSI within Integrated Logistic Support (ILS). He has served as DoD HSI SubTAG chair and member of the Simulation and Modeling Test and Evaluation Display and Control Systems Human Computer Interaction Specifications and Standards and Systems Design Sub Tags as a member of the Society of Naval Architects and Marine Engineers (SNAME) Systems Safety Panel and a member of NATO RSG 14 on man-machine analysis. Thomas B. Malone: CHFEP received a Ph.D. in experimental psychology from Fordham University in 1964. He is president of Carlow

The objectives of Human engineering (HE) are generally viewed as increasing human performance, reducing human error, enhancing personnel and equipment safety, and reducing training and related personnel costs. There are other benefits that are thoroughly consistent with the direction of the Navy of the future, chief among these is reduction of required numbers of personnel to operate and maintain Navy ships. The Naval Research Advisory Committee (NRAC) report on Man-Machine Technology in the Navy estimated that one of the benefits from increased application of man-machine technology to Navy ship design is personnel reduction as well as improving system availability, effectiveness, and safety The objective of this paper is to discuss aspects of the human engineering design of ships and systems that affect manning requirements, and impact human-performance and safety The paper will also discuss how the application of human engineering leads to improved performance, and crew safety, and reduced workload, all of which influence manning levels. Finally, the paper presents a discussion of tools and case studies of good human engineering design practices which reduce manning.

关键词： Human engineering

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Reliability evaluation of highly reliable computer control systems for energy generation, transmission and distribution

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EUROPEAN TRANSACTIONS ON ELECTRICAL POWER 1996年第2期6卷 111-118页

作者： Kochs, HD Dieterle, W Dittmar, E [?]Prof. Dr.-Ing. Hans-Dieter Kochs (1943) VDE is head of the Department of Computer Science and Information Processing Systems at the Gerhard Mercator-University of Duisburgl Germany. He received the Dip1.-Ing. degree in Electrical Engineering and the Dr.-Ing. degree from the RWTH Aached Germany in 1972 and 1976 respectively. From 1979 to 1991 he was system engineer and division leader in the areas of R & D of highly-reliable large-scale control and information systems (AEGIDaimler FAG-Kugelfischer). Since 199 1 he has been Professor at the University of Duisburg. His current R & D areas are reliability safety and fault tolerance of technical systems especially automation systems and hybridknowledge based systems including fuzzy-logic and neural networks. (Gerhard-Menxitor-University-GH Duisburg FB 71FG 10 Lotharstr. 1 D-47048 Duisburg T +49203/379-2204 Fax +49203I379-2205)

The paper presents the results of an application-based reliability study of distributed computer control systems with very high reliability demand, e.g. for supervision and control of power plants and energy distribution systems. A reliability classification scheme is presented and typical redundant control system structures are evaluated and classified due to their system reliability Special focus is placed on assessing the influence of the communication system on total system reliability.

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