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Sliding mode control with linear quadratic hyperplane design: an application to an active magnetic bearing system

Husain, Abdul Rashid and M. N., Ahmad and A. H., Mohd Yatim (2007) Sliding mode control with linear quadratic hyperplane design: an application to an active magnetic bearing system. In: The 5th Student Conference on Research and Development, SCOReD 2007, 12-11 Dec. 2007 , Selangor, Malaysia .

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Official URL: http://dx.doi.org/10.1109/SCORED.2007.4451443

Abstract

This paper deals with modeling and control of a nonlinear horizontal active magnetic bearing (AMB) system via current control scheme. The gyroscopic effect and mass imbalance inherited in the system are proportional to the rotor speed in which these nonlinearities cause high system instability as the rotational speed increases. In order to synthesize a robust controller that can stabilize the system under a wide range of rotational speed, the dynamic AMB model is transformed into a deterministic model to form a class of uncertain system. Then, based on Sliding Mode Control (SMC) theory and Lyapunov method, a new robust controller that stabilizes the system is proposed wherein the Linear Quadratic Regulator (LQR) is used to design the sliding surface. Under this control, the reaching condition is guaranteed and the closed loop system is stable. The performance of the controller applied to the AMB model is demonstrated through simulation works under various rotational speeds and system conditions.

Item Type:Conference or Workshop Item (Paper)
Additional Information:978-1-4244-1469-7
Uncontrolled Keywords:active magnetic bearing (AMB), sliding mode control, deterministic form.
Subjects:T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:21987
Deposited By: Ramli Haron
Deposited On:05 Mar 2012 01:50
Last Modified:05 Mar 2012 01:50

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