Please use this identifier to cite or link to this item: https://doi.org/10.1002/acs.990
Title: H∞ compensation of external vibration impact on servo performance of hard disk drives in mobile applications
Authors: Du, C.
Ge, S.S. 
Lewis, F.L.
Keywords: Acceleration feedforward
External vibration compensation
H∞ control
Hard disk drives
Linear matrix inequality
Servo control
Issue Date: May-2008
Citation: Du, C., Ge, S.S., Lewis, F.L. (2008-05). H∞ compensation of external vibration impact on servo performance of hard disk drives in mobile applications. International Journal of Adaptive Control and Signal Processing 22 (4) : 374-387. ScholarBank@NUS Repository. https://doi.org/10.1002/acs.990
Abstract: H∞ compensation for external vibration impact on the positioning accuracy of hard disk drives is considered in this paper. A feedforward controller is designed to attenuate the impact with the aid of a sensor to detect external vibrations. Loop shaping in frequency domain and H∞ method in state space are used to design the feedforward controller. The linear matrix inequality approach is adopted for solving the H∞ feedforward control design problem. The application results in a 1.8-in disk drive with an accelerometer to measure acceleration signal show that 97% reduction of the position error signal is achieved with the feedforward control designed by the H∞ method. The effectiveness of the two methods is also evaluated and compared when external vibration model is subjected to gain variations. Copyright © 2007 John Wiley & Sons, Ltd.
Source Title: International Journal of Adaptive Control and Signal Processing
URI: http://scholarbank.nus.edu.sg/handle/10635/82439
ISSN: 08906327
DOI: 10.1002/acs.990
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