Please use this identifier to cite or link to this item: https://doi.org/10.1007/s00542-006-0302-0
Title: Enhanced disturbance suppression in sampled-data systems and its application to high density data storage servos
Authors: Pang, C.K.
Guo, G.
Chen, B.M. 
Lee, T.H. 
Issue Date: May-2007
Source: Pang, C.K., Guo, G., Chen, B.M., Lee, T.H. (2007-05). Enhanced disturbance suppression in sampled-data systems and its application to high density data storage servos. Microsystem Technologies 13 (8-10) : 911-921. ScholarBank@NUS Repository. https://doi.org/10.1007/s00542-006-0302-0
Abstract: Precise servo control systems require strong disturbance rejection capabilities for accurate positioning in the nanometer scale world today. In this paper, we propose an add-on DDO (disturbance decoupling observer) and DDOS (DO with extraneous sensor) for stronger disturbance suppression. Our proposed control methodology uses a nominal plant model and its inverse to reject input and output disturbances simultaneously in sampled-data systems. The plant inverse controller is approximated by tuning a single parameter. Experimental results on a PZT actuated servo system with air flow of mean speed of 50 m/s corresponding to 15,000 rpm in today's high end hard disk drives show an improvement of 69.2% of 3σ PES (position error signal) during track-following. © 2006 Springer-Verlag.
Source Title: Microsystem Technologies
URI: http://scholarbank.nus.edu.sg/handle/10635/70182
ISSN: 09467076
DOI: 10.1007/s00542-006-0302-0
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