Unknown input observer of a class of switched control systems

Author

Chen, Weitian ; Saif, Mehrdad

Author_Institution

Sch. of Eng. Sci., Simon Fraser Univ., Vancouver, BC, Canada

fYear

2005

fDate

8-10 June 2005

Firstpage

1173

Abstract

For a class of linear switched control systems (LSCSs) with unknown inputs, we study in this paper the unknown input observer (UIO) design problem. To design a full (reduced) order UIO, we first design for each subsystem a full (reduced) order UIO, and then we construct a full (reduced) order UIO for the whole system via picking the corresponding full (reduced) order UIO of the active subsystem according to the switching rule. Sufficient conditions for the existence of both full order and reduced order UIOs are derived. The design procedures of full order UIOs and reduced order UIOs are presented. Several stability results regarding to the state estimation error dynamics are established. Examples are given to show how to design UIOs for particular switched systems, and simulation results are given to show the effect of the designed UIOs.

Keywords

linear systems; observers; stability; time-varying systems; uncertain systems; linear switched control system; stability; state estimation error dynamics; switching rule; unknown input observer; Control systems; Design methodology; Linear matrix inequalities; Linear systems; Lyapunov method; Observers; Stability; State estimation; Sufficient conditions; Switched systems;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2005. Proceedings of the 2005

ISSN

0743-1619

Print_ISBN

0-7803-9098-9

Electronic_ISBN

0743-1619

Type

conf

DOI

10.1109/ACC.2005.1470120

Filename

1470120