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http://dx.doi.org/10.5302/J.ICROS.2015.15.0054

Enhanced Performance of Disturbance Observer by Embedding a Filter and Its Application to Hard Disk Drive  

Ha, Jongsoo (ASRI, Department of Electrical and Computer Engineering, Seoul National University)
Park, Gyunghoon (ASRI, Department of Electrical and Computer Engineering, Seoul National University)
Shim, Hyungbo (ASRI, Department of Electrical and Computer Engineering, Seoul National University)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.21, no.9, 2015 , pp. 811-817 More about this Journal
Abstract
In this paper, we present a new control structure which is obtained by adding an appropriately designed filter to a conventional disturbance observer. The proposed controlled system preserves advantages of a system with the conventional disturbance observer; disturbance rejection and nominal performance recovery. In particular, by embedding the filter, the disturbance rejection performance is enhanced compared with that of the classical disturbance observer-based controlled system. Moreover, we suggest a condition for the robust internal stability of the considered system in this paper. Simulation results regarding an effect of relatively high-frequency disturbance on hard disk drive are also presented.
Keywords
hard disk drive; disturbance observer; sonic vibration; high frequency disturbance;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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