Comparison of suboptimal control methods in magnetic levitation system

Author

Smirnov, Alexander ; Jastrzebski, Rafal P. ; Hynynen, Kullervo ; Pyrhonen, Olli

Author_Institution

Lappeenranta Univ. of Technol., Lappeenranta, Finland

fYear

2013

fDate

2-6 Sept. 2013

Firstpage

1

Lastpage

10

Abstract

The use of active magnetic bearings (AMB) is increasing in high-speed applications, because their low friction operation allows higher rotational speeds than the traditional bearings. The inherent instability and complexity of the AMB rotor system with high nonlinearities pose challenges to the controller design. This leads to a problem of robust design. Robustness of LQG and loop-shaping H_∞ controllers is compared with the help of the evolutionary algorithm both theoretically and based on experimental measurements.

Keywords

control nonlinearities; control system synthesis; evolutionary computation; linear quadratic Gaussian control; magnetic bearings; magnetic levitation; magnetic variables control; optimal control; rotors; AMB; AMB rotor system; active magnetic bearings; controller design; evolutionary algorithm; friction operation; loop-shaping H_∞ controllers; magnetic levitation system; robust design; rotational speeds; suboptimal control methods; Actuators; Equations; Magnetic levitation; Mathematical model; Rotors; Transfer functions; Uncertainty; Magnetic bearings; active damping; genetic algorithm; optimisation; robust control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications (EPE), 2013 15th European Conference on

Conference_Location

Lille

Type

conf

DOI

10.1109/EPE.2013.6631929

Filename

6631929