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IEEE Conference on control Technology and Applications (CCTA)

作者： van der Klauw van Ingen van Rhijn Olivier van den Bosch de Callafon Dutch Technology Foundation Netherlands Department of Elec. Engineering Control Laboratory Delft University of Technnology Delft Netherlands ESSO Rotterdam Rotterdam Netherlands Department of Elec. Engineering Measurement and Control Section Eindhovan University of Technology Eindhoven Netherlands Department of Mech. Engineering Systems and Control Group Delft University of Technnology Delft Netherlands

To improve the closed-loop operation of a distillation column, a model is needed for control design. To obtain the data, a closed-loop experiment is designed and executed. Models are obtained by applying the direct identification method and the two-step method to the closed-loop data. Both output error models and linear regression schemes based on orthonormal basis functions (ORTFIR) are used. It appears that a combination of the two-step method and an ORTFIR model in the first step gives good results. The results are compared with the currently implemented model, and show considerable improvement in prediction capability. The new model is currently used to redesign the control loop.< >

关键词： Chemical industry Process control Identification Feedback systems

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USING VIRTUAL ENVIRONMENTS IN THE DESIGN OF SHIPS

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NAVAL ENGINEERS JOURNAL 1994年第3期106卷 91-106页

作者： JONS, OP RYAN, JC JONES, GW Otto P. Jons:received a Diplom Ing. in shipbuilding from the Technical University of Hanover W. Germany and an MS in naval architecture and marine engineering from MIT. He then joined Litton Ship Systems where he was responsible for the preliminary design of the DD-963 hull structure and then for ship system integration as manager LHA ship systems engineering department. From 1972 to 1974 he was the principal research scientist at Hydronautics. In 1974 as technical director he helped establish the Crystal City office of Designers and Planners. Mr. Jons was one of the co-founders of Advanced Marine Enterprises Inc. in 1976 where he serves as corporate vice president engineering. J. Christopher Ryan:earned his bachelors and masters degrees in naval architecture from Webb Institute and MIT respectively. He spent three years at the advanced marine technology division of Litton Industries working on the DD-963 class ship design and related computer aided design projects. He subsequently went to the Navy Department concentrating on early stage design of surface combatants for twelve years including work on the FFG-7 Sea Control Ship CSGN and CVV aircraft carrier projects. He then shifted focus and became the Technical Director for the Computer Supported Design Program in NavSea for five years. Mr. Ryan has served in several supervisory positions within the Ship Design Group in NavSea since that time. He is currently the director of the future ship concepts division. Gary W. Jones:graduated from the University of Tennessee in 1971 with a BS in mechanical engineering and followed up with graduate work at George Washington University and the University of Maryland. Mr. Jones was with the Naval Sea Systems Command from 1971 until 1988 where he was a naval architect in the submarine section of the hull form design division. In 1988 he was detailed to the Defense Advanced Research Projects Agency (DARPA) where he became the program manager for the advanced submarine technology program's hydrodynamic hydroac

A major contributor to the expense and length of time to design, build, and test new systems has been the need to build and test hardware prototypes to determine their effectiveness in meeting operational requirements. Recent and dramatic advances in computer simulation technologies hold forth the promise of revolutionizing design and acquisition strategies by providing the means to validate end users' requirements prior to hardware construction. By designing and operationally testing virtual prototypes in a virtual environment, these technologies will soon offer naval architects the ability to build and launch ships in computer-based cyberspace in lieu of the shipbuilder's ways. The authors of this paper provide the background for these developments, explore the significance and ramifications of these technologies to the current process of ship and system design, outline challenges lying ahead, and present their vision and recommendations for future development.

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BioX ++ -Extended Learning control of Biotechnological Processes

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IFAC Proceedings Volumes 1993年第2期26卷 997-1000页

作者： K.D. Bettenhausen H. Tolle Section Control Systems Theory and Robotics Institute of Control Engineering Technical University of Darmstadt Darmstadi Germany

The technical use of biological or biochemical processes requires additionally to the biological preparation and process engineering an intelligent automatic control engineering whose performance characteristics excel the classical approaches. Most fermentations are operated in a phase-building batch mode, which does not allow a linearization of the not or only inexact known process model and the operation near one or several different working points. With Bio X + + an intelligent control system was successfully designed, whose fundamentals and extensions will be the contents of the article at hand

关键词： Biotechnology batch fermentations learning systems associative memories expert systems fuzzy systems

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Parametric Uncertainty Modeling using LFTs

Parametric Uncertainty Modeling using LFTs

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American control Conference (ACC)

作者： Paul Lambrechts Jan Terlouw Samir Bennani Maarten Steinbuch Mechanical Engineering Systems and Control Group Delft University of Technnology Delft Netherlands National AeroSpace Laboratory NLR Amsterdam Netherlands Faculty of AeroSpace Engineering Section Stability and Control Delft University of Technnology Delft Netherlands Philips Research Laboratories Eindhoven Netherlands

In this paper a general approach for modelling structured real-valued parametric perturbations is presented. It is based on a decomposition of perturbations into linear fractional transformations (LFTs), and is applicable to rational multi-dimensional (ND) polynomial perturbations of entries in state-space models. Model reduction is used to reduce the size of the uncertainty structure. The procedure will be applied for the uncertainty modelling of an aircraft model depending on altitude and velocity (flight envelope).

关键词： Uncertainty control system synthesis Polynomials Aerospace engineering Laboratories Stability Robust control Transfer functions Aerospace control Mechanical engineering

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SHIPBOARD DAMAGED STABILITY ASSESSMENT - THE FLOODING CASUALTY control SOFTWARE

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NAVAL ENGINEERS JOURNAL 1993年第3期105卷 152-166页

作者： ZAHN, PB ROSBOROUGH, J CARLSTROM, R Peter B. Zahn:is a section chief in the Naval Architecture Department at Advanced Marine Enterprises. He is responsible for software development and special trials support. He has led the Flooding Casualty Control Software (FCCS) development effort since joining AME in 1989. He is also responsible for the material handling strikedown and stowage (MHS&S) software development program as well as special trials support for the ACVLAP and T-AGOS 19 programs. Prior to joining AME Mr. Zahn spent nine years with various companies of the ARCTEC Group. His experience includes field trials in venues from the Caribbean to the Bering Sea as well as model tests and engineering design and development efforts. Mr. Zahn received his B.S. in naval architecture and marine engineering from Webb Institute in 1980 and has published various papers on pollution prevention offshore systems and icebreaker design and performance. He is a member of ASNE and SNAME. John Rosborough:has been a naval architect for the Naval Sea Systems Command (NavSea) for the past 15 years. He is currently assigned to the Hydrodynamics Division with responsibility for aircraft carrier stability evaluations and as a task leader for computer-aided ship design development. In the Stability Division he was previously responsible for stability analyses on various amphibious ships SWATHs and foreign ships. He manages the upgrade and augmentation of SHCP at NavSea and is the Navy's technical point of contact for evaluating shipboard stability software and transitioning technology to the fleet. Mr. Rosborough received his B.S. in naval architecture and marine engineering from the University of Michigan in 1977. He is a member of USNI and the Association of Scientists and Engineers at NavSea. Richard Carlstrom:is a naval architect with Advanced Marine Enterprises. He has been responsible for software development in support of a variety of major programs including FCCS and SHCP and is a specialist in stability evaluations for complex ships such as CVs CVNs

The Flooding Casualty control Software (FCCS) was developed under the auspices of the Naval Sea systems Command (NavSea) and is currently being deployed on a variety of ships in the neets of both the U.S. Navy and the U.S. Coast Guard. The primary objective of FCCS is to enable damage control personnel to identify critical stability conditions, especially when related to the loss of reserve buoyancy due to battle damage and the destabilizing effects of large quantities of firefighting water, in a timely manner. FCCS was initially deploved in 1990. It utilizes the standard algorithms of the Ship Hull Characteristics Program (SHCP). The user interface was designed to allow quick familiarity for shipboard users, primarily the damage control assistant (DCA) and his staff. Intact stability evaluations include the effects of topside icing, high winds, personnel crowding, heavy lifts over the side, high speed turns, and towing. FCCS also supports ballasting analysis for amphibious ships as well as providing bottom reaction and beached stability data for grounding incidents. Bv providing a tool for the ''fuel king'' and DCA to generate the required daily updates on the current ship load and liquids status, FCCS is assured of an accurate baseline in the event of damage. The design allows the evaluation of the ultimate ship stability status for a damage event using simple compartmentation and flooding status inputs. Evaluation of the adequacy of resulting stabilitv, as well as identification of such critical stability parameters as off center loading, margin line immersion, and negative GM, are accomplished by the program. Guidance is provided for the user to initiate appropriate flooding related damage control activities. Initially fitted on USS Oliver Hazard Perry Class frigates, FCCS databases have been for the USCG Hamilton class high endurance cutters, USS Arleigh Burke class Aegis destroyers, and a variety of other U.S. Navy and U.S. Coast Guard ship classes. The progra

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Selection of flowmeters for nuclear fuel processing

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Flow Measurement and Instrumentation 1992年第1期3卷 3-8页

作者： Finlayson, A.J. Senior Design Engineer Process Control Section Systems and Equipment Engineering Department Warrington Cheshire WA3 6AS United Kingdom

关键词： flowmeter selection nuclear fuels processing

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Integration of Expert systems and Neural Networks for the control of Fermentation Processes

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IFAC Proceedings Volumes 1992年第2期25卷 379-382页

作者： S. Gehlen H. Tolle J. Kreuzig P. Friedl Technical University of Darmstadt Institute of Control Engineering Section Control Systems Theory and Robotics Londgraf-Georg-Str. 46100 Darmstadt Germany Technical University of Darmstadt Institute of Biochemistry Petersenstr. 22 6100 Darmstadt Germany

Expert systems and neural networks are new tools for the control of fermentation processes. With expert systems the fermentation plant and the process itself is modelled via a generalized, qualitative system description based on the experience of human experts. On the other hand neural networks and interpolating associative memories can learn the process behaviour directly by process observation. The paper at hand reports, how both control techniques can be combined for purposes like process supervision, modelling and optimization of biological plants.

关键词： Expert systems neural networks associative memories learning control fermentation processes biotechnology

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THE NPS AUV-II AUTONOMOUS UNDERWATER VEHICLE TESTBED - DESIGN AND EXPERIMENTAL-VERIFICATION

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NAVAL ENGINEERS JOURNAL 1992年第3期104卷 191-202页

作者： HEALEY, AJ GOOD, MR Dr. Anthony J. Healey:was graduated from London and Sheffield Universities with the degrees B.Sc.(Eng.j and Ph.D. in mechanical engineering in 1961 and 1966 respectively. He emigrated to the U.S. in 1966 and has taught at The Pennsylvania State University MIT The University of Texas at Austin and the Naval Postgraduate School. He was promoted to full professor of mechanical engineering in 1974 at the University of Texas at Austin and in 1981 he joined Brown and Root Inc. as manager of the Pipeline and Sub-Sea Technology Research Group. In 1986 he assumed his present position as professor and chairman of mechanical engineering at the U.S. Naval Postgraduate School. His areas of specialty include mechanical system dynamics vibration and control systems and he is presently the leader of an Interdisciplinary Project in Mission Planning Navigation and Control for Autonomous Underwater Vehicles at NPS. Lt. Michael R. Good:is an engineering duty officer assigned to Puget Sound Naval Shipyard. He graduated from Marquette University in 1983 with a B.S. degree in mechanical engineering. He has served on the USS Jack Williams (FFG-24) as ordnance officer and damage control assistant. He obtained the master of science in mechanical engineering degree from the Naval Postgraduate School in 1989 during which time he was the chairman of the Monterey Peninsula Section of ASNE. He is currently assigned as senior ship superintendent and docking officer.

The design, construction and testing of an autonomous underwater vehicle (AUV) for use as a research and development testbed at the Naval Postgraduate School (NPS) is presented. Design objectives, analysis and trade-offs are discussed with respect to a generic AUV with specific details for the case of the NPS AUV II. System integration and flexibility are emphasized in the subject vehicle to support presently planned and future research employment. Hull, mobility, sensors, automatic control, and energy subsystems are described. Design and fabrication techniques for the NPS AUV II vehicle hull and equipment are documented. Some results from an experimental program illustrating verification of vehicle design are described.

关键词： Submersibles

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WIND VECTOR DERIVATION USING THE SSR MODE-S DATA LINK

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INTERNATIONAL JOURNAL OF systems SCIENCE 1991年第8期22卷 1495-1508页

作者： REKKAS, CM TSIOUMAS, SA KRIKELIS, NJ Control Systems Section Department of Mechanical Engineering National Technical University of Athens Athens Patission 10682 Greece

The need for good meterological data is a problem of great importance for the aviation community. This need is related to areas of major interest such as aircraft operating costs and the Air Traffic control systems automation. The wind vector derivation problem is investigated and a simple algorithm is proposed, capable of running together with all potential trackers. The new algorithm requires the transmission of the on board heading and true air speed measurements to the ground station via the Secondary Surveillance Radar Mode S data link. The algorithm performance is evaluated, and the results obtained are shown to be very satisfactory.

关键词： Anemometers

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Computational Complexity of Path Planning Algorithms Based on Safe Triangles and Quadtree as Work Space Representations: A Comparison †

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IFAC Proceedings Volumes 1991年第9期24卷 277-281页

作者： Xiaozhao Mao Institute of Control Engineering Section Control Systems Theory and Robotics Technical University Darmstadt Schlossgraben 1 D-6100 Darmstadt Germany

Computational complexity of two path planning approaches for a two-dimensional (2D) work space is considered: The approach using safe triangles and the approach based on quadtree. The average cost of establishing work space representation, i.e. of building the safe triangles and the quadtree respectively, are estimated. Both approaches are simulated to plan paths for numerous work spaces with obstacles which are generated at random. The results of the simulation are summarized to show the expected behavior of each approach. Comparison based on analyses and simulation is presented.

关键词： Computational complexity path planning robotics space representation

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