Analysis of EALQR control design methodology

Author

Seo, Young Bong ; Choi, Jae Weon

Author_Institution

Sch. of Mech. Eng., Pusan Nat. Univ., South Korea

fYear

1999

fDate

36373

Firstpage

1031

Lastpage

1036

Abstract

EALQR (linear quadratic regulator with an eigenstructure assignment capability), a control design methodology previously developed by the authors, performs better than a conventional LQR or an eigenstructure assignment. However, it has a constraint on the weighting matrix, that is, the weighting matrix can be indefinite for some high-order systems. This paper analyzes the effects of an indefinite weighting matrix in EALQR on the frequency domain properties. The robustness criterion and the quantitative frequency domain properties are presented. The frequency domain properties of EALQR with an indefinite weighting matrix have been analyzed by applying them to a flight control system as a design example

Keywords

aircraft control; control system synthesis; eigenstructure assignment; frequency-domain analysis; linear quadratic control; matrix algebra; robust control; stability criteria; aircraft control; eigenstructure assignment; flight control system; frequency domain analysis; linear quadratic regulator; robustness; weighting matrix; Aerospace control; Control design; Control systems; Eigenvalues and eigenfunctions; Frequency domain analysis; Mechanical engineering; Riccati equations; Robust stability; Robustness; Symmetric matrices;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE Annual, 1999. 38th Annual Conference Proceedings of the

Conference_Location

Morioka

Print_ISBN

4-907764-13-8

Type

conf

DOI

10.1109/SICE.1999.788693

Filename

788693