Control-oriented modeling and analysis of automotive transcritical AC system dynamics

Author

Rasmussen, Bryan ; Alleyne, Andrew ; Bullard, Clark ; Hmjak, Pega ; Miller, Norman

Author_Institution

Dept. of Mech. & Ind. Eng., Illinois Univ., Urbana, IL, USA

Volume

4

fYear

2002

fDate

2002

Firstpage

3111

Abstract

This paper presents a dynamic model of a transcritical air-conditioning system, specifically suited for multivariable controller design. The physically based model retains sufficient detail to accurately predict system dynamic response while also being simple enough to be of value in determining appropriate control strategies. The control focus would be quasi-steady transitions between operating states by modulating flow rates of both air and refrigerant to meet changing constraints on capacity, efficiency, noise, etc. Both nonlinear and linearized versions of the model are compared to experimental data. Possibilities for model order reduction are substantiated.

Keywords

air conditioning; automobiles; controllers; multivariable control systems; automotive transcritical AC system dynamics; control-oriented modeling; dynamic model; model order reduction; multivariable controller design; operating states; physically based model; quasi-steady transitions; system dynamic response; transcritical air-conditioning system; Automotive engineering; Carbon dioxide; Control system analysis; Equations; Finite difference methods; MIMO; Nonlinear dynamical systems; Predictive models; Refrigerants; Vehicle dynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2002. Proceedings of the 2002

ISSN

0743-1619

Print_ISBN

0-7803-7298-0

Type

conf

DOI

10.1109/ACC.2002.1025267

Filename

1025267