Optimal ℋ∞ control for electromagnetic suspension systems with finite frequency specifications

Author

Yang Xiaozhan ; Zheng Zhong ; Zeng Yi ; Wu Ligang

Author_Institution

Dept. of Control Sci. & Eng., Harbin Inst. of Technol., Harbin, China

fYear

2014

fDate

28-30 July 2014

Firstpage

4377

Lastpage

4382

Abstract

In this paper, the problem of ℋ_∞ control for electromagnetic suspension (EMS) systems is addressed, and cases of both finite and entire frequency are discussed. Firstly a linear state-space model is applied to approximated the complex EMS system, and then ℋ_∞ performance index is adopted to measure ride comfort in circumstance of more general exogenous disturbances. By using the generalized Kalman-Yakubovich-Popov (KYP) lemma, the entire frequency ℋ_∞ norm is extended to finite frequency case. Consequently, for concerned frequency range, the ℋ_∞ performance of EMS system can be further improved. Finally, numerical simulation on an EMS system is performed to validate the effectiveness of the proposed approach.

Keywords

H^∞ control; Kalman filters; electromagnetic devices; optimal control; performance index; state-space methods; suspensions (mechanical components); H_∞ norm; H_∞ performance index; KYP lemma; complex EMS system; electromagnetic suspension systems; finite frequency specifications; generalized Kalman-Yakubovich-Popov lemma; linear state-space model; numerical simulation; optimal H_∞ control; Closed loop systems; Energy management; Environmental management; Frequency control; Linear matrix inequalities; Suspensions; Symmetric matrices; ℋ∞ performance; Generalized KYP lemma; electromagnetic suspension systems; finite frequency control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2014 33rd Chinese

Conference_Location

Nanjing

Type

conf

DOI

10.1109/ChiCC.2014.6895673

Filename

6895673