Decoupling control of AC-DC-3DOF-HMB based on inverse system method

Author

Zhu, Huangqiu ; Zhang, Weiyu ; Wang, Quan ; Zhang, Tingting ; Yang, Zebing

Author_Institution

Sch. of Electr. & Inf. Eng., Jiangsu Univ., Zhenjiang, China

fYear

2010

fDate

26-28 May 2010

Firstpage

2109

Lastpage

2114

Abstract

The AC-DC 3 degrees of freedom hybrid magnetic bearing (AC-DC-3DOF-HMB) is a multivariable, nonlinear and strong coupled system. In the paper, a decoupling control approach based on inverse system method is proposed, which is used to decouple this system. Firstly, the configuration of the AC-DC-3DOF-HMB is introduced briefly, the mathematical equations of radial and axial suspension forces are set up. Secondly, the state equations of the AC-DC-3DOF-HMB are set up, the analytical inverse system of the AC-DC-3DOF-HMB is obtained by analyzing the reversibility of the mathematical model, and then inverse system and original system are in series to constitute pseudo linear systems. Finally, controllers of the pseudo linear systems are designed by using linear system theory, and the whole control system is simulated by using Matlab software. The simulation results show that this control strategy can realize decoupling control among 3 degrees of freedom displacements for the AC-DC-3DOF-HMB, and the whole control system has good dynamic and static performance.

Keywords

magnetic bearings; multivariable systems; nonlinear systems; AC-DC-3DOF-HMB; Matlab; analytical inverse system; axial suspension forces; decoupling control; hybrid magnetic bearing; linear system theory; multivariable system; nonlinear system; pseudo linear systems; radial suspension forces; strong coupled system; Control system synthesis; Control systems; Couplings; Displacement control; Linear feedback control systems; Linear systems; Magnetic levitation; Magnetic variables control; Permanent magnets; Stators; AC-DC-3DOF-HMB; Decoupling Control; HMB; Mathematical Model;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (CCDC), 2010 Chinese

Conference_Location

Xuzhou

Print_ISBN

978-1-4244-5181-4

Electronic_ISBN

978-1-4244-5182-1

Type

conf

DOI

10.1109/CCDC.2010.5498875

Filename

5498875