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TECHNICAL BRIEFS

A Singular Perturbation Approach for Modeling Differential-Algebraic Systems

[+] Author and Article Information
Brandon W. Gordon

d’Arbeloff Lab for Information Systems and Technology, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

Sheng Liu

Raytheon Systems Company, Tewksbury, MA 01876

J. Dyn. Sys., Meas., Control 120(4), 541-545 (Dec 01, 1998) (5 pages) doi:10.1115/1.2801500 History: Received May 13, 1997; Online December 03, 2007

Abstract

Dynamic systems described by an implicit mixed set of Differential and Algebraic Equations (DAEs) are often encountered in control system modeling and analysis due to inherent constraints in the system. A key difficulty in control and simulation of DAE systems is that they are not expressed in an explicit state space representation. This paper describes a general approach based on singular perturbation analysis for adding fast dynamics to a system of DAEs so that they can be expressed in an explicit state space form. Conditions for asymptotic convergence and approximation methods are investigated. The approach is illustrated for a model of a two-phase flow heat exchanger.

Copyright © 1998 by The American Society of Mechanical Engineers
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