Title :
Analysis of EALQR control design methodology
Author :
Seo, Young Bong ; Choi, Jae Weon
Author_Institution :
Sch. of Mech. Eng., Pusan Nat. Univ., South Korea
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;
Conference_Titel :
SICE Annual, 1999. 38th Annual Conference Proceedings of the
Conference_Location :
Morioka
Print_ISBN :
4-907764-13-8
DOI :
10.1109/SICE.1999.788693
