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Special section on manoeuvering control of marine craft

control engineering PRACTICE 2003年第4期11卷 413-414页

作者： Blanke, M Poursanjani, MMA Vukic, ZZ Section of Automation at Oersted Technical University of Denmark DTU Elektrovej Building 326 2800 Lyngby Denmark Southampton Institute East Park Terrace SO14 0YN Southampton UK Department of Control and Computer Engineering University of Zagreb Unska 3 10000 Zagreb Croatia

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3-D flame temperature field reconstruction with multiobjective neural network

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Chinese Optics Letters 2003年第2期1卷 78-81页

作者：万雄高益庆汪元美 Institute of Automation of Nanjing University of Aeronautics and Astronautics Nanjing 210016 Department of Test and Control Engineering Nanchang Institute of Aeronautical Technology Nanchang 330034 Department of Test and Control Engineering Nanchang Institute of Aeronautical Technology Nanchang 330034 Department of Test and Control Engineering Nanchang Institute of Aeronautical Technology Nanchang 330034 novel 3-D temperature field reconstruction method is proposed in this paper which is based on multi-wavelength thermometry and Hopfield neural network computed tomography. A mathematical model of multi-wavelength thermometry is founded and a neural network algorithm based on multiobjective optimization is developed. Through computer simulation and comparison with the algebraic reconstruction technique (ART) and the filter back-projection algorithm (FBP) the reconstruction result of the new method is discussed in detail. The study shows that the new method always gives the best reconstruction results. At last temperature distribution of a section of four peaks candle flame is reconstructed with this novel method.

A novel 3-D temperature field reconstruction method is proposed in this paper, which is based on multi-wavelength thermometry and Hopfield neural network computed tomography. A mathematical model of multi-wavelength thermometry is founded, and a neural network algorithm based on multiobjective optimization is developed. Through computer simulation and comparison with the algebraic reconstruction technique (ART) and the filter back-projection algorithm (FBP), the reconstruction result of the new method is discussed in detail. The study shows that the new method always gives the best reconstruction results. At last, temperature distribution of a section of four peaks candle flame is reconstructed with this novel method.

关键词： Mathematical models Neural networks Spectrum analysis

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Suppressing shock waves on the A1 in The Netherlands-model calibration and model-based predictive control

Suppressing shock waves on the A1 in The Netherlands-model c...

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International Conference on Intelligent Transportation

作者： A. Hegyi D.N. Duy B. De Schutter J. Hellendoorn S.P. Hoogendoorn S. Stramigioli Delft Center for Systems and Control Delft University of Technnology Delft Netherlands Transponation Planning and Traffic Engineering Section Fac. Civil Engineering & Geosciences Delft University of Technnology Delft Netherlands Control Laboratory. EUCE. Fac. of Electrical Engineering Mathematics & Computer Science University of Twente Enschede Netherlands

We now apply the model predictive control (MPC) of speed limits that we have presented in previous publications to a calibrated METANET model of a 19 km stretch of the real-world freeway A1 in The Netherlands. This freeway regularly suffers from shock waves originating mainly from on-ramps, and speed limits are now used to suppress these shock waves. First, we calibrate and validate the extended METANET model with data from the A1 freeway, and we use the Delft OD method to estimate the origin-destination patterns that are needed for the simulation of the destination oriented traffic. Next, we verify from data whether the necessary conditions for applying speed limits against shock waves are satisfied. We show that the MPC controller performs well even under the assumption that the traffic demand is not known on the on-ramps and is known for only a few kilometers upstream and downstream of the controlled stretch. This approach results in an improvement of the total time spent in the network with about 15%.

关键词： Predictive models Shock waves Calibration Predictive control Traffic control Pollution measurement Artificial intelligence Communication system traffic control Optimal control Vehicle dynamics

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Suppressing shock waves on the A1 in The Netherlands - Model calibration and model-based predictive control

Suppressing shock waves on the A1 in The Netherlands - Model...

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2003 IEEE International Conference on Intelligent Transportation Systems, ITSC 2003

作者： Hegyi, A. Duy, D.N. De Schutter, B. Hellendoorn, J. Hoogendoorn, S.P. Stramigioli, S. Delft Center for Systems and Control Delft Univ. of Technology Mekelweg 2 Delft2628 CD Netherlands Transportation Planning and Traffic Engineering Section Fac. Civil Eng. and Geosciences Delft Univ. of Technology P.O. Box 5048 Delft2600 GA Netherlands Control Laboratory EL/CE Fac. of Electrical Eng. Mathematics and Computer Science Univ. of Twente P.O. Box 217 Enschede7500 AE Netherlands

ISBN: (纸本)0780381254

关键词： Shock waves

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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Robustness of a class of stabilizing controllers for bifurcated systems

Robustness of a class of stabilizing controllers for bifurca...

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IEEE Conference on Decision and control

作者： Xiang Chen A.G. Sparks Kemin Zhou Guoxiang Gu Department of Electrical and Computer Engineering Louisiana State University Baton Rouge LA USA Department of Electrical Engineering Lakehead University Thunder Bay ONT Canada Control Analysis Section WL/FIGC OH USA

In this paper, we provide analysis on the robustness of a class of stabilizing controllers for bifurcated systems subject to smooth uncertainties. We derive computable conditions that could be used to characterize the... 详细信息

关键词： Robust control control systems Bifurcation Nonlinear control systems Uncertainty Nonlinear systems Eigenvalues and eigenfunctions control design Job design Ear

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Development and validation of the automatic control rods operation system for ABWR

Development and validation of the automatic control rods ope...

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IEEE Conference on Human Factors and Power Plants

作者： H. Miura A. Arakawa Computer & Control Engineering Section Nuclear Control & Electrical Engineering Dep TOSHIBA Yokohama Japan Electronic System Technology Group Nuclear Engineering Laboratory TOSHIBA Kawasaki Japan

TOSHIBA has introduced the first automatic control rods operation system for the first ABWR (advanced BWR) in the world. The automatic control rods operation system, which is named APR (Automatic Power Regulator), has core critical approach control, pressurization control and power control function and covers the operation from reactor startup to about 70% electrical power. APR calculates the manipulating demand of control rods from feedback signals, that are neutron flux, calculated temperature rise ratio and electrical power. The manipulating demand of control rods is dispatched to an RC&IS (rod control and information system) as an insertion/withdrawal signal. The control rods to be operated are automatically selected by the RC&IS. In the development of this system, a 3D core simulator was adopted to verify the control algorithm and to validate this system. Prior to startup tests, a 3D core simulator was used to precisely predict dynamics and to verify control parameters. In parallel with the introduction of APR to ABWRs, operators were trained to operate the APR with a plant wise simulator, in which the 3D core simulator is adopted for precise simulation of flux behavior. Through this training, operators can obtain the skill to operate the APR system under normal plant condition and abnormal condition such as plant transients or APR failure.

关键词： Automatic control control systems Pressure control Regulators Power control Inductors Temperature control Feedback Neutrons Information systems

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Bifurcation stabilization with local output feedback

Bifurcation stabilization with local output feedback

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American control Conference (ACC)

作者： Guoxiang Gu Xiang Chen A.G. Sparks S.S. Banda Department of Electrical & Computer Engineering Louisiana State University Baton Rouge LA USA Control Analysis Section WL/FIGC OH USA

Local output feedback stabilization with smooth nonlinear controllers is studied for parametrized nonlinear systems for which the linearized system possesses either a simple zero eigenvalues, or a pair of imaginary eigenvalues, and the bifurcated solution is unstable at the critical value of the parameter. It is assumed that the unstable mode corresponding to the critical eigenvalues of the linearized system is not linearly controllable. Two results are established for bifurcation stabilization: 1) stabilizability conditions for the case where the critical mode is not linearly observable through output measurement; and 2) stabilizability conditions for the case when the critical mode is linearly observable through output measurement. It is shown that linear controllers are adequate for stabilization of transcritical bifurcation and quadratic controllers are adequate for stabilization of pitchfork and Hopf bifurcations, respectively. The results can be used to synthesize stabilizing controllers, if they exist.

关键词： Bifurcation Output feedback Nonlinear control systems control systems Nonlinear systems Eigenvalues and eigenfunctions State feedback Linear feedback control systems Ear control system synthesis

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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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Measuring the distance and orientation of a planar surface using nonstructured lighting

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SYSTEMS AND computerS IN JAPAN 1996年第8期27卷 83-92页

作者： Tsukiyama, T Member Electrotechnical Laboratory Tsukuba Japan 305 Tosbifumi Tsukiyama:graduated in 1972 from the Biological Engineering Department Osaka University where he also received his Dr. of Eng. degree. He joined Electrotechnical Laboratory Ministry of Tread and Industry (Japan) in 1972. At present he is Senior Researcher at Computer Vision Section Intelligent Systems Division ETL. He was a Visiting Researcher at University of Illinois during 1984–1985. He has been interested in vision system for mobile robots and image processing architectures. He is a member of the Society of Instrumental and Control Engineers Japan Robotics Society of Japan and Information Processing Society of Japan.

This paper proposes a method of 3-dimensional measurement of a planar surface by using two fixed light sources and a TV camera. A set of two images is recorded by the camera switching on each light alternately. The peak of the luminance distribution in each image is detected, and the orientation and distance of the planar surface are calculated. The position of the peak of a luminance distribution can be estimated accurately by using an image processing. The light sources can be conventional apparatus with no particular structure. The method is simple and suitable for a vision system on an indoor mobile robot.

关键词： distance to surface orientation of planar surface point light source luminance distribution ring light

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