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Computer-controlled equipment testing: Speed, accuracy and improved analysis

NAVAL ENGINEERS JOURNAL 1998年第1期110卷 207-215页

作者： Smith, JJ Greene, WC John J. Smith is a senior field engineer with the Electrmics Systems Division (ESD) of TRACOR System Technologies Inc. As the technical supervisor fm the Impact and Feasibility Studies group of the E nginemang Department he provides engineering support to the Ships Communication Systems Operation Branch Naval Air Warfare Center Aircraft Division Patuxent River St. Inigoes Maryland. This support entails the integration of radio communication systems on USS Arleigh Burke (DDG 51)-class AEGIS destrqvers and special engineering projects. During 23 years of Naval service as an electronics technician he sewed as electronics division officer for the repair division (R-4) on board USS Ghore (AS IS) homeported in La Maddalena Sardinia. His last duty station was NAVCOMSTA Roosevelt Road Puerto Rico where he sewed as muster chief-in-charge of electronic communications repair the island-wide communications quality control chiel the contract administrator to the operations and maintenance contractor supporting Mystic Star transmitter and receiver facilities for Air Fme One communications the Naval transmitter station and 16 interconnecting remote mimowave sites. Wilhemina C. Greene is a Supervisory Electronics Engineer with the Combatant Engineering and Integration Section at NAWCAD. As the team leader directs the effots of Civilian and contractors personnel responsible for delivering a fully integrated and tested Radio Communication Systems for surfme cmnbatant ships. The team also pvovida the Nay's only system level training on RCS for all AEGIS Pre-Communits. As part ofthis eflort she is responsible for the operation and maintenance of the Satellite Production Test Centq a facility housing the RCS test beds. Ms. Greene has over 20 years of government service 13 years on the AEGIS RCS program. She has a BSEE degree from Tennessee State University.

As shipboard radio communication systems (RCSs) become more complex and crew size continues to be reduced, the requirement for an automated, condition-based maintenance system is imperative. Personal computers can be programmed to provide full equipment testing that is capable of digital interface as well as automated and semi-automated testing of equipment that is not buss-controllable. Some of the advantages of computer-controlled equipment testing (CCET) include increased accuracy repeatability, and data-collection capability for in-depth analysis. However, the paramount advantage of CCET is speed. This paper will describe various methods of remote testing, including using a LAN, the Internet, and the telephone system. It will detail application software developed to test the Aegis-class destroyers' RCS equipment. This paper examines CCET as it is presently applied to the Aegis Board of Inspection and Survey (INSURV) support program. Additionally, the condition-based maintenance (CBM) application developed for over-the-air system testing of the Navy's UHF line-of-sight (LOS) system installed on the USS Yorktown (CG 48) as part of the Smart Ship project will be described. This paper will also describe CCET methods to use charged-coupled device (CCD) miniature cameras to read analog meters, gauges, or entire gauge boards.

关键词： electronic ship equipment

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EDITORIAL

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International Journal of Robust and Nonlinear control 1998年第4期7卷

作者： Giorgio Bartolini Antonella Ferrara Sarah Spurgeon Department of Electrical and Electronic Engineering University of Cagliari Piazza d'Armi 09123 Cagliari Italy Department of Communication Computer and System Sciences University of Geneva Via Opera Pia 13 Geneva Italy Control Systems Research Department of Engineering University of Leicester Leicester LE1 7RH U.K.

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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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Pulsewidth modulation control of electronic ballast for dimming control of fluorescent lamps

Pulsewidth modulation control of electronic ballast for dimm...

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IEEE International Symposium on Industrial electronics (ISIE)

作者： C. Branas F.J. Azcondo S. Bracho Department of Electronic Technology System Engineering and Automation University of Cantabria Santander Spain

The design of a resonant-inverter for the control of high efficiency lamps is presented. The topology of the circuit is a full-bridge parallel resonant-converter that switches at fixed frequency, and incorporates a pulsewidth modulation (PWM) method to control the output power. Expressions are provided that are fundamental for the design and the understanding of the operational principle. With a proposed lamp model and using it as the load of the inverter, the circuit operation is analysed. The experimental results of the design are compared with calculations and HSPICE simulations.

关键词： Space vector pulse width modulation Pulse modulation electronic ballasts Pulse width modulation Resonance Lamps Circuit topology RLC circuits Switching circuits Switches

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Anti-windup designs for multivariable controllers 4

Anti-windup designs for multivariable controllers

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4th European control Conference, ECC 1997

作者： Peng, Youbin Vrančić, Damir Hanus, Raymond Weiler, Steven R. Department of Control Engineering CP. 165 Université Libre de Bruxelles Avenue F. D. Roosevelt 50 BrusselsB-1050 Belgium Department of Computer Automation and Control J. Stefan Institute Jamova 39 Ljubljana1001 Slovenia Department of Electrical and Electronic Engineering University of Melbourne Parkville3052 Australia

ISBN: (纸本)9783952426906

This paper addresses two important aspects of anti-windup (AW) designs, namely the parametrization of linear AW compensators, and the role of artificial nonlinearity (AN) in the design of AW compensators for multivariable systems. For the first issue, a simple parametrization is given using the classical feedback structure in the framework of constrained unity feedback multivariable control system. Conditions for controller implementability and closed-loop stability are stated in terms of this parametrization. For the second issue, two existing AN designs for coordinate plant inputs whenever one plant input enters saturation are reviewed. The first design is the widely used input direction preserving technique, and the second is an optimal AN design. A comparative simulation study illustrates that the conditioning technique, enhanced by optimal AN design, gives the best tracking performance among different existing methods.

关键词： control nonlinearities

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An application of the extended Kalman filter for integrated navigation in mobile robotics

An application of the extended Kalman filter for integrated ...

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American control Conference (ACC)

作者： A. Alessandri G. Bartolini P. Pavanati E. Punta A. Vinci IAN-Institute for Naval Automation CNR-National Research Council Genoa Italy Department of Electrical and Electronic Engineering University of Cagliari Cagliari Italy Department of Communications Computer and System Sciences DIST-University of Genoa Genoa Italy

In this paper the problem of integrated navigation for mobile robotics is addressed. The dynamics of ground robots are nonlinear, as well as the measurement devices. For the purposes of position estimation, a dead reckoning problem with a wheeled mobile robot is considered using a gyro and two wheel encoders. The extended Kalman filter (EKF) is used to provide an estimate of vehicle state, gyro error dynamics and variables describing the slip effects. The parameters of the error dynamics have been identified and validated off-line by real data. Simulations results have confirmed the efficacy of the proposed approach, by comparing the performances of the EKF with and without a wheel slip model.

关键词： Navigation Mobile robots Vehicle dynamics State estimation Robotics and automation Wheels Mobile computing Dead reckoning Vehicles Robot sensing systems

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On convergence of neural approximate nonlinear state estimators

On convergence of neural approximate nonlinear state estimat...

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American control Conference (ACC)

作者： T. Parisini A. Alessandri M. Maggiore R. Zoppoli Department of Electrical Electronic and Computer Engineering DEEI-Università di Trieste Trieste Italy IAN-Institute for Naval Automation CNR-National Research Council Genoa Italy Department of Communications Computer and System Sciences DIST-University of Genoa Genoa Italy

The problem of designing a state observer for nonlinear systems has been faced in several works in the past decades and only recently researches focused on the discrete-time ones. In the paper, the case of a noisy measurement channel is addressed. By generalizing the classical least-squares method we compute the estimation law off-line by solving a functional optimization problem. Convergence results of the estimation error are stated and the approximate solution of the above problem is addressed by means of a feedforward neural network. A min-max technique is proposed to determine the weight coefficients of the "neural" observer so as to estimate the system state to any given degree of accuracy, thus guaranteeing the boundedness of the estimation error.

关键词： Convergence State estimation Observers Estimation error Design engineering Design automation Councils Optimization methods Nonlinear dynamical systems Length measurement

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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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CONDITIONS ON SOURCE SIGNALS FOR BLIND SEPARATION

CONDITIONS ON SOURCE SIGNALS FOR BLIND SEPARATION

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1996 3rd International Conference on Signal Processing(ICSP’96)

作者： Jie Zhu Xi-Ren Cao Institute of Radio & Automation Control The South China University of Technology Department of Electrical & Electronic Engineering The Hong Kong University of Science and Technology

ISBN: (纸本)0780329120

In blind source separation problem it is usually assumed that the source signals are mutually *** has been realized that this assumption is not *** this paper,we provide some general conditions under which the source signals can be recovered from their linear mixtures. We first define two concepts,the mutually M-th order independence and the pairwise M-th order independence,on a set of random *** we prove that if the source signals are mutually M-th order independent,then those source signals,each of which has at least one nonzero m-th order cumulant for 3≤m≤M,can be *** conclusion is in spirit similar to but more general than that proposed by Tong et al[10].The constructive proof suggests an algorithm for the blind separation of sources which are mutually Af-th order *** examples arc presented to illustrate the results.

关键词： CONDITIONS ON SOURCE SIGNALS FOR BLIND SEPARATION

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Application of a constraint-oriented knowledge processing system to a section mill finishing facility line scheduling system

Application of a constraint-oriented knowledge processing sy...

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SICE Annual Conference

作者： Y. Miyamoto M. Hayashi K. Kato S. Ihara Y. Takase Y. Funakoshi K. Saito Electronic & Control Technology Development Center Application Engineering Department AI System Section Kawasaki Heavy Industries Limited Akashi Japan

This paper proposes a constraint oriented approach to solve practical multipurpose machine(MPM) flow shop problems with changeover time and limited transportation capacity. In practical MPM flow shop problems, the transportation capacity is limited. Owing to this limitation, interference phenomena peculiar to complex production lines occur, thus decreasing production capacity. The algorithm proposed in this paper solves practical MPM flow shop problems by explicitly using constraints to avoid interference. The validity of this method is confirmed by discrete simulations of a section mill finishing facility line. Furthermore, the method is applied to an actual section mill finishing facility line.

关键词： Milling machines Finishing Transportation Job shop scheduling Interference constraints Production systems Electrical equipment industry Artificial intelligence Expert systems

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