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UNCERTAINTY IN THE NATIONAL ENERGY modeling system .1. METHOD DEVELOPMENT

JOURNAL OF ENERGY ENGINEERING 1995年第3期121卷 108-124页

作者： BAGHELAI, C MOUMEN, F COHEN, M KYDES, A HARRIS, CM US ENERGY INFORMAT ADM WASHINGTON DC 20585 USA GEORGE MASON UNIV FAIRFAX VA 22030 USA

This work documents a major part of a large effort to characterize the uncertainty present in key elements of the U.S. Department of Energy's new National Energy modeling system (NEMS). It is expected that NEMS will be used to estimate the impact that Federal policy initiatives, such as taxes, subsidies, and regulations, will have on energy markets well into the 21st century. But, the effective use of NEMS requires that the uncertainties in its predictions be well understood. So, the Energy Information Administration, the Washington Consulting Group, and the School of Information Technology and Engineering of George Mason University collaborated on the development and testing of methods for quantifying uncertainty in the three most important NEMS submodel types, namely, linear-optimization, econometric, and heuristic or balance equations. We constructed assessment procedures for each of these classes, and used them on the Energy Information Administration transportation sector demand model, petroleum market model, and electricity fuel dispatch model. The methods used include special sampling procedures applied to computer-based experiments, response surface techniques, and Taylor series methods, and they are described in this first of a two-part paper on the complete study. The important numerical results of our experiments and their subsequent analyses are presented in the companion paper.

关键词： Energy management

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Adaptive control system for power factor compensation

Adaptive control system for power factor compensation

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International conference on Industrial Electronics, Control and Instrumentation

作者： D. Raonic L. stankovic D. Petranovic Allen-Bradley Inc. Cambridge ONT Canada EE Department University of Montenegro Podgorica Yugoslavia Engineering Department Harvey Mudd College Claremont CA USA

The adaptive control system for power factor compensation is proposed in this paper. It enables the active filter or hybrid SVC to reach desired current for various load changes in a very short time. Responses of the adaptive control system, for typical changes in load, are simulated and obtained results analyzed. The simulation results show that the proposed system responds quickly and accurately, and can be efficiently used for reactive power compensation and higher harmonics suppression. The proposed algorithm is computationally attractive and the control system is suitable for low cost microprocessor implementation.

关键词： Adaptive control Reactive power Computational modeling Active filters static VAr compensators Analytical models Harmonics suppression Control systems Costs Microprocessors

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Indirect adaptive speed control of induction motor systems based on model reference identifiers

Indirect adaptive speed control of induction motor systems b...

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International conference on Industrial Electronics, Control and Instrumentation

作者： F. Alonge T. Raimondi Istituto di Automatica e Sistemistica Facoltàdi Ingegneria University of Palermo Palermo Italy

This paper deals with indirect adaptive control techniques applied to the synthesis of the speed loop of motion control systems with induction motors. An identifier is firstly designed, according to model reference adaptive control system schemes, to obtain identification of quantities characterizing the motion equation, namely parameters and disturbances. Then, a feedback control structure is designed according to a model following control scheme, whose parameters are computed online so that the identified system tracks an implicit reference model. Several tests carried out by simulation experiments confirm the validity of the approach followed.

关键词： Programmable control Adaptive control Velocity control Induction motors Control system synthesis Motion control Equations Feedback control Testing Computational modeling

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Database design for machining cell level product specification

Database design for machining cell level product specificati...

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International conference on Industrial Electronics, Control and Instrumentation

作者： S.-A. Andreasson A. Adlemo M. Fabian P. Gullander B. Lennartson Department of Computing Science Chalmers University of Technology Goteborg Sweden Department of Computer Engineering Chalmers University of Technology Goteborg Sweden Control Engineering Laboratory Chalmers University of Technology Goteborg Sweden Department of Production Engineering Chalmers University of Technology Goteborg Sweden

To create a flexible machining cell control system a control algorithm is required that is based on models of products and resources. The scope of this paper is to present the database structure of a model used to des... 详细信息

关键词： Machining Object oriented modeling Relational databases Control systems Control system synthesis Manufacturing systems Control engineering Robots Design methodology Control engineering computing

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Automatic transformation of simple user commands to hierarchical Petri nets

Automatic transformation of simple user commands to hierarch...

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IEEE International conference on systems, Man and Cybernetics

作者： B. strege H. Tolle H. Loydl Control Systems Theory and Robotics Department Technical University of Darmstadt Darmstadt Germany

Petri nets represent a highly effective tool for the development of control systems for flexible manufacturing cells (FMC) due to their graphical modeling technique, compact representation, the availability of mathematical analysis tools and the direct transformability to PLC (programmable logic controller) programs. Since FMC control systems are required to be modifiable by low-qualified operators on the shop floor and Petri nets are too complex for them, this paper describes a concept to overcome this problem; it is based on strategic commands and information about the manufacturing system which can be specified in object-oriented following the morphological concepts commonly used by the operators and are then automatically transformed to Petri nets. An example shows how the methodology works in practice.

关键词： Petri nets Programmable control Control system synthesis Automatic control Flexible manufacturing systems Virtual manufacturing Object oriented modeling Mathematical model Availability Mathematical analysis

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In a team of robots the loudest is not necessarily the best

In a team of robots the loudest is not necessarily the best

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IEEE International conference on systems, Man and Cybernetics

作者： A. Agah G.A. Bekey Institute for Robotics and Intelligent Systems Computer Science Department University of Southern California Los Angeles CA USA

The effects of communication on the task performance of simulated robot colonies are studied Robots in the colony perform tasks that require the cooperation of two robots in time and in space. A robot's call for help is responded to by another robot, resulting in the pair performing the cask. The control of the robots is based on the concept of a tropism system cognitive architecture. The effects of the communication radius on performance of the colony is studied, and it is shown that a larger communication radius does not necessarily result in better colony performance.

关键词： Robot kinematics Cognitive robotics Robot sensing systems Orbital robotics Intelligent robots Intelligent systems Communication system control Control systems Computer science Computational modeling

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Electromechanical simulator for cardiac catheter positioning: testing device for the intraventricular impedance imaging system

Electromechanical simulator for cardiac catheter positioning...

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Annual Northeast Bioengineering conference

作者： Wei Wei S. Kun R.A. Peura Biomedical Engineering Department Worcester Polytechnic Institute Worcester MA USA

An electromechanical simulator for cardiac catheter positioning testing has been developed to experimentally evaluate the Intraventricular Impedance Imaging (III) system performance. Such an approach eliminates numerous problems associated with in vivo testing. This paper presents the results of such a modeling technique. The intraventricular probe positioning was realized as 3-D probe movement (static) or/and cardiac volume variation (dynamic), using hardware and/or software control modes. A ventricle imaging model was built using a 3-compartment simulator representing the blood, myocardium and lungs. Experimental results show that the model provides a static positioning resolution of 0.01-0.15 mm, dynamic volumetric resolution of 0.08 ml, and phantom resistivity contrast for blood:myocardium:lungs of 1:3.4:7.3.

关键词： Catheters Probes system testing Impedance system performance In vivo Hardware Blood Myocardium Lungs

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Model-based programming and diagnosis for programmable logical controllers

Model-based programming and diagnosis for programmable logic...

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IEEE International conference on systems, Man and Cybernetics

作者： K. Lemmer B. Ober E. Schnieder Institute of Control and Automation Engineering Technical University of Braunschweig Brunswick Germany

In control engineering models of the controlled systems are the basis for controller synthesis as well as for analytical or simulated examination of open or closed-loop behaviour. This model-based methodology is being transferred into automation engineering by means of a development environment for the programming of logical controllers. Petri net models of the controlled system allow an automatic computation of the control algorithm being specified by desired or forbidden states or state sequences. The control algorithms which are equally represented as Petri nets are then automatically translated into a code for programmable logical control. The models of the controlled system and the synthesized control algorithm are used for automatically generating diagnosis data for a model-based PLC diagnosis system.

关键词： Logic programming Automatic control Control system synthesis Automatic generation control Control engineering Computational modeling Analytical models Automation Automatic programming Petri nets

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A distributed field message controller for intelligent conveyor systems

A distributed field message controller for intelligent conve...

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IEEE International conference on systems, Man and Cybernetics

作者： W.H.R. Yeung P.R. Moore Dept. of Manuf. Eng. City Univ. of Hong Kong Hong Kong

In this paper, a new distributed and flexible field message control system (FMCS) is presented. The FMCS utilizes the Intel bitbus implementation of fieldbus to provide a user friendly and object based methodology for the definition and control of intelligent conveyor systems. The FMCS is easily integrated with other system components/machines by providing an additional control messaging scheme, which allows better communication between devices. A case study is presented where the FMCS works cooperatively with a colour Petri-net based cell controller for the real-time control of an experimental flexible assembly system.

关键词： Distributed control Control systems Intelligent systems Field buses Object oriented modeling Communication system control Assembly systems Flexible manufacturing systems Programmable control Intelligent sensors

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An elevator group control system with floor attribute control method and system optimization using genetic algorithms

An elevator group control system with floor attribute contro...

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International conference on Industrial Electronics, Control and Instrumentation

作者： A. Fujino T. Tobita K. Segawa K. Yoneda A. Togawa Mito Works Hitachi and Limited Hitachinaka Ibaraki Japan

A new concept is proposed for an elevator group control system which can change control settings according to individual floor utilization situations. The floor attribute based control method uses a combination of floor attribute based evaluation and car attribute based evaluation. Computer simulations show it can improve multiple preferential floor simulations at the same time. Additionally, an on-line parameter tuning method using genetic algorithms is proposed. The floor attribute control method needs some dozens of control parameters to be tuned according to each building's traffic, and the proposed method can do it. The elitest preserving strategy is an effective way to keep control stability. A diversity recovering operation, which initializes population, excluding the elitest individual when traffic flow data have changed, improves the following ability for transitions of utilized conditions.

关键词： Control systems Elevators optimization methods Floors Genetic algorithms Computer simulation Traffic control Transportation Artificial intelligence Jamming

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