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A Time Delay-Based Gain Scheduled Control and It's Application to Electromagnetic Suspension System  

Hong Ho-Kyung (기계연구원 자기부상열차사업단)
Jo Jeong-Min (기계연구원 자기부상열차사업단)
Cho Heung-Jae (기계연구원 자기부상열차사업단)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.54, no.12, 2005 , pp. 569-575 More about this Journal
Abstract
This paper proposes a gain scheduled control technique using time-delay for the nonlinear system with plant uncertainties and unexpected disturbances. The time delay-based gain scheduled control depends on a direct estimation of a function representing the effect of uncertainties. The information from the estimation is used to cancel the unknown dynamics and the unexpected disturbances simultaneously. The proposed estimation scheme with a finite convergence time is formulated in order to estimate the unknown scheduling variable variation. In other words, the time delay-based gain scheduled control uses the past observation of the system's response and the control input to directly modify the control actions rather than to adjust the controller gains or to identify system parameters. It has a simple structure so as to minimize the computational burden. The benefits of this proposed scheme are demonstrated in the simulation of an electromagnetic suspension system with plant uncertainties and external disturbances, and the proposed controller is compared with the conventional state feedback controller.
Keywords
The Time Delay-based Gain Scheduled Control; Electromagnetic Suspension System; Feedback Controller;
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