제어로봇시스템학회:학술대회논문집
- 2003.10a
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- Pages.452-457
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- 2003
Design of Output Regulator for Rejecting Periodic Eccentricity Disturbance in Optical Disc Drive
- Shim, Hyung-Bo (School of Electrical Engineering, Seoul National University) ;
- Kim, Hyung-Jong (Division of Electrical and Computer Engineering, Hanyang University) ;
- Chung, Chung-Choo (Division of Electrical and Computer Engineering, Hanyang University)
- Published : 2003.10.22
Abstract
An add-on type output regulator is proposed in this paper. By an add-on controller we mean an additional controller which operates harmonically with a pre-designed one. The role of the add-on controller is to reject a sinusoidal disturbance of unknown magnitude and phase but with known frequency. Advantages of the proposed controller include that (1) it can be used only when the performance of disturbance rejection needs to be enhanced, (2) when it is turned on or off, unwanted transient can be avoided (i.e., bumpless transfer), (3) it is designed for perfect disturbance rejection not just for disturbance reduction, (4) ability for perfect rejection is preserved even with uncertain plant model. This design may be promising for optical disc drive (ODD) systems in which disc eccentricity results in a sinusoidal disturbance. For ODD systems, the sensitivity function obtained by the pre-designed controller, which may have been designed by the lead-lag,