Nonlinear Modeling and Control of Active Magnetic Bearings for a Flywheel Energy Storage System

Author

Chih Keng Chen ; Trung Dung Chu

Author_Institution

Dept. of Mech. & Autom., Dayeh Univ., Changhua, Taiwan

Volume

1

fYear

2014

fDate

26-27 Aug. 2014

Firstpage

284

Lastpage

287

Abstract

In this study, a structure of a five degree of freedom flywheel energy storage system (FESS) is introduced. A nonlinear model of active magnetic bearing (AMB) system in the FESS is obtained by Lagrange´s equation. In this model, the current in each coil is treated as a state variable and the control input is the voltage applied to each coil, this approach offers more advantages than current control input approach. PID controllers with decentralized structure are proposed to control the nonlinear multiple-input multiple-output (MIMO) system. Dynamic behavior of the flywheel in magnetic bearings and performance of the controller is discussed in simulation results.

Keywords

decentralised control; flywheels; magnetic bearings; nonlinear control systems; three-term control; voltage control; AMB system; FESS; Lagrange´s equation; PID controllers; active magnetic bearing system; control input; decentralized structure; five degree of freedom flywheel energy storage system; nonlinear MIMO system; nonlinear model; nonlinear multiple-input multiple-output system; state variable; Coils; Equations; Flywheels; Magnetic levitation; Mathematical model; Rotors; Modeling; active magnetic bearings; control; flywheel energy storage system;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Human-Machine Systems and Cybernetics (IHMSC), 2014 Sixth International Conference on

Conference_Location

Hangzhou

Print_ISBN

978-1-4799-4956-4

Type

conf

DOI

10.1109/IHMSC.2014.76

Filename

6917359