Title :
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
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;
Conference_Titel :
Intelligent Human-Machine Systems and Cybernetics (IHMSC), 2014 Sixth International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4799-4956-4
DOI :
10.1109/IHMSC.2014.76
