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Design of Disturbance Observer Using Robust Control Method for SPM-based Data Storage Systems  

Moon, Jun (한양대학교, 국방과학연구소)
Lee, Choong-Woo (한양대학교 전자통신전파공학과)
Chung, Chung-Choo (한양대학교 전기제어생체공학부)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.58, no.1, 2009 , pp. 160-167 More about this Journal
Abstract
In this paper, we apply the robust disturbance observer (DOB) to a SPM-based data storage (SDS) system. In the SDS system, coupling dynamics and parameter uncertainties are obstacles to the precision tracking control. Although the DOB is known to be an effective method to reject disturbances, there has been no systematic design approach to how to design DOB parameters. In this paper, the robust DOB is formulated based on the robust stabilization of normalized coprime factor plant description and the $H{\infty}$ loop shaping method. From the simulation and experimental results. the improved robustness and performance are obtained by the proposed robust DOB.
Keywords
Disturbance Observer; Robust Control; data storage system; $H_{\infty}$ loop shaping;
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