Discrete-time LQR/H∞ control of magnetic levitation systems

Author

Jen-Hsing Li

Author_Institution

Dept. of Electr. Eng., Kun Shan Univ., Tainan, Taiwan

fYear

2014

fDate

18-20 June 2014

Firstpage

779

Lastpage

784

Abstract

This paper provides the discrete-time mixed LQR/H∞ control of magnetic levitation systems (MLS). The discrete-time model of MLS is proposed. The specified discrete-time PD control methodology is reviewed. The equivalent state and output feedback controls of MSS are derived in this paper. MSS have been important topics of many engineering applications. These applications are levitation of high speed trains, frictionless bearings, and wind tunnels. MSS are nonlinear and unstable systems. Therefore, they are good educational benchmarks for testifying different control methods.

Keywords

H^∞ control; PD control; discrete time systems; linear quadratic control; magnetic levitation; magnetic variables control; nonlinear control systems; state feedback; H∞ control; MLS discrete-time model; MSS output feedback controls; MSS state feedback controls; discrete-time PD control methodology; discrete-time mixed LQR control; frictionless bearings; high speed train levitation; magnetic levitation systems; nonlinear systems; unstable systems; wind tunnels; Closed loop systems; Magnetic levitation; Mathematical model; Output feedback; PD control; Robustness; State feedback;

fLanguage

English

Publisher

ieee

Conference_Titel

Control & Automation (ICCA), 11th IEEE International Conference on

Conference_Location

Taichung

Type

conf

DOI

10.1109/ICCA.2014.6871020

Filename

6871020