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2003 Summer Computer Simulation Conference, SCSC 2003

作者： Gabcan, Ludmila Dos Santos, Carlos Luiz N. Landau, Luiz Laboratory of Computational Methods in Engineering - LAMCE Department of Civil Engineering - PEC Federal University of Rio de Janeiro - UFRJ P.O. BOX 68552 ZIP 21949-900 Rio de Janeiro RJ Brazil

ISBN: (纸本)1565552687

This paper presents a method by which the results of the generated simulation of a logical 3-D model using VR Techniques may be developed and that this model may be used as a training tool. The model contains components that the user may employ to observe its dynamics in a simple and operational manner. The floor plan of this project was based on the original blueprints of the Institute of Thoracic Diseases, a part of the Federal University of Rio de Janeiro (UFRJ). This methodology is easily applied to day-to-day situations.

关键词： Hospitals

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Lagrangian solution methods for nonlinear model predictive control

Lagrangian solution methods for nonlinear model predictive c...

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作者： Muske, Kenneth R. Howse, James W. Hansen, Glen A. Department of Chemical Engineering Villanova University Villanova PA 19085 United States Computational Science Methods Group Los Alamos National Laboratory Los Alamos NM 87545 United States

This work presents a simultaneous approach to the solution of the receding horizon, open-loop optimal model predictive control law for nonlinear systems using first-order Lagrangian methods. The nonlinear model considered is a general form of the initial value advective-diffusion parabolic partial differential equation. Others forms may be considered in a similar manner. The Lagrangian is formed from the discretized objective function, model and constraint equations. A finite volume approach is used to discretize the partial differential model equations. Inequality constraints on the model states and control inputs are handled with an active set method. The nonlinear equations resulting from the first order necessary conditions are then solved directly using a Newton-Krylov technique. © 2000 American Automatic Control Council.

关键词： Nonlinear equations

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Lagrangian solution methods for nonlinear model predictive control

Lagrangian solution methods for nonlinear model predictive c...

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American Control Conference (ACC)

作者： K.R. Muske J.W. Howse G.A. Hansen Department of Chemical Engineering Villanova University Villanova PA USA Computational Science Methods Group Los Alamos National Laboratory Los Alamos NM USA

关键词： Lagrangian functions Predictive models Predictive control Nonlinear equations Partial differential equations Differential equations Open loop systems Nonlinear systems Ear Input variables

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Temperature profile estimation for a thermal regenerator

Temperature profile estimation for a thermal regenerator

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IEEE Conference on Decision and Control

作者： K.R. Muske J.W. Howse G.A. Hansen D.J. Cagliostro Department of Chemical Engineering Villanova University Villanova PA USA Los Alamos National Laboratory Computational Methods Group Los Alamos NM USA

The thermal regenerator system studied is the blast furnace stoves for the No. 7 blast furnace at the Ispat Inland facility in East Chicago, Indiana. The paper outlines the process model and model-based state estimation techniques implemented on these stoves. The process model is a detailed heat transfer model of the stoves used as part of a predictive control scheme to determine the minimum amount of fuel necessary to heat the blast air. Batch nonlinear least squares estimation is used to update the predicted temperature profile at the end of each cooling cycle. This estimated profile is then used by the model-based controller to determine the minimum fuel requirement for the subsequent heating cycle.

关键词： Blast furnaces Predictive models Heat transfer Fuels State estimation Predictive control Least squares approximation Cooling Temperature control Heating

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Hot blast stove process model and model-based controller

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Iron and Steel Engineer 1999年第6期76卷 56-62页

作者： Muske, Kenneth R. Howse, James W. Hansen, Glen A. Cagliostro, Dominic J. Chaubal, Pinakin C. Quisenberry, Paul E. Washo, Michael J. Department of Chemical Engineering Villanova University Villanova PA United States Computational Science Methods Group Los Alamos National Laboratory Los Alamos NM United States Ispat Inland Inc. East Chicago IN United States

A process model and model-based control techniques were implemented on the hot blast stoves for the No. 7 blast furnace at the Ispat Inland facility in East Chicago, Ind. to determine the minimum amount of fuel necessary to achieve the hot blast temperature requirements. Initial results revealed a 5% reduction in the use of natural gas enrichment for the stoves. This reduction was achieved with an estimated on-line time of 80% for the controller. Based on this initial analysis, it was considered that a 5% reduction in natural gas usage is a conservative savings achievable with the controller.

关键词： Stoves

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Blast furnace stove control

Blast furnace stove control

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1998 American Control Conference, ACC 1998

作者： Muske, Kenneth R. Hanson, Glen A. Howse, James W. Cagliostro, Dominic J. Chaubal, Pinakin C. Department of Chemical Engineering Villanova University Villanova PA 19085 United States Computational Methods Group Los Alamos National Laboratory Los Alamos NM 87545 United States Research Laboratories Inland Steel Industries Inc. East Chicago IN 46312 United States

ISBN: (纸本)0780345304

This paper outlines the process model and model-based control techniques implemented on the hot blast stoves for the No. 7 Blast Furnace at the Inland Steel facility in East Chicago, Indiana. A detailed heat transfer model of the stoves is developed. It is then used as part of a predictive control scheme to determine the minimum amount of fuel necessary to achieve the blast air requirements. The controller also considers maximum and minimum temperature constraints within the stove. © 1998 AACC.

关键词： Blast furnaces

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Blast furnace stove control

Blast furnace stove control

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American Control Conference (ACC)

作者： K.R. Muske G.A. Hanson J.W. Howse D.J. Cagliostro P.C. Chaubal Department of Chemical Engineering Villanova University Villanova PA USA Computational Methods Group Los Alamos National Laboratory Los Alamos NM USA Research Laboratories Inland Steel Industries Inc. East Chicago IN USA

关键词： Blast furnaces Fuels Combustion Heating Laboratories Temperature control Iron Cooling Natural gas Manufacturing

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A COMPARISON OF THE PERFORMANCE OF THE FINITE-DIFFERENCE TIME-DOMAIN, FINITE-ELEMENT TIME-DOMAIN, AND GENERALIZED YEE ALGORITHMS ON HIGH-PERFORMANCE PARALLEL COMPUTERS

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 265-275页

作者： GEDNEY, SD NAVSARIWALA, U Department of Electrical Engineering University of Kentucky Lexington KY 40506–0046 U.S.A. Stephen D. Gendey received the B.Eng honors degree from McGill University Montreal PQ in 1985 and the M.S. and Ph.D. degrees in electrical engineering from the University of Illinois Urbana-Champaign IL in 1987 and 1991 respectively. From 1985 to 1987 he worked for the U.S. Army Corps of Engineers Champaign IL where he was engaged in research in EMP pulse simulation and propagation. From 1987 through 1991 he held various fellowships and assistantships at the University of Illinois and was involved in the development of computational methods fort he analysis of electromagnetic scattering by complex bodies and surfaces. Since 1991 he has been an Assistant Professor of Electrical Engineering at the Univesity of Kentucky. In 1992 and 1993 he received the NASA/ASEE Summer Faculty Fellowship at the Jet Propulsion Laboratory Pasadena CA where he has been involved in the development of techniques for the full-wave analysis of printed microwave circuits and antennas. His current research interests are in the areas of microwave circuit and antenna design and analysis the analysis of electrical interconncts of VLSI packages electromagnetic scattering and the development of parallel computational methods for the analysis of large-scale electromagnetic problems. Umesh D Navsariwala was born in Bombay India in 1970. He received his Bachelor of Technology degree in electrical engineering from the Indian Institute of Technology Bombay India in 1991. In 1993 he received his M.S. degree in electrical engineering from University of Kentucky Lexington. He is currently pursuing doctoral studies in electrical engineering at the University of Kentucky. His fields of interest are computational electromagnetics finite element methods time-domain methods and parallel computational methods.

Parallel algorithms for the finite difference time-domain (FDTD), the planar generalized Yee (PGY), and the finite element time-domain (FETD) methods are presented. The FDTD and the PGY algorithms are both explicit time-domain solutions of Maxwell's equations, while the PGY algorithm is based on an unstructured grid. The FETD algorithm is a semi-implicit solution of Maxwell's equations using variational principles, and thus requires a matrix inversion for every time iteration. The three parallel algorithms are based on spatial decompositions of the discrete three-dimensional problem spaces. A comparative analysis of the parallel algorithms is presented based on their memory and computational efficiency as well as their parallel efficiency.

关键词： Parallel algorithms

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THE SIMULATION OF INVISCID, COMPRESSIBLE FLOWS USING AN UPWIND KINETIC METHOD ON UNSTRUCTURED GRIDS

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INTERNATIONAL JOURNAL FOR NUMERICAL methods IN FLUIDS 1992年第1期15卷 59-82页

作者： MATHUR, JS WEATHERILL, NP Institute for Numerical Methods in Engineering Department of Civil Engineering University College of Swansea Singleton Park Swansea SA2 8PP U.K. On leave from Computational and Theoretical Fluid Dynamics Division National Aeronautical Laboratory Bangalore India.

A kinetic flux-vector-splitting method has been used to solve the Euler equations for inviscid, compressible flow on unstructured grids. This method is derived from the Boltzmann equation and is an upwind, cell-centred, finite volume scheme with an explicit time-stepping procedure. The Delaunay triangulation has been used to generate the grids. The approach is demonstrated for three flow field simulations, namely the subsonic flow over a two-component high-lift aerofoil, the transonic flow over an aerofoil and the supersonic flow in a channel.

关键词： INVISCID COMPRESSIBLE FLOW UPWIND ALGORITHM CELL CENTERED FINITE VOLUME UNSTRUCTURED GRIDS

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Modeling and Simulation of Turbulent Mixing and Reaction 1

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丛书名： Heat and Mass Transfer

1000年

作者： Daniel Livescu Arash G. Nouri Peyman Givi Francine Battaglia

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