Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/73971
Title: Track-following control of four-bar structured HDD via parameter-dependent pre-compensation
Authors: Guo, Y.
Gao, T.
Xie, L.
Du, C.
Ong, C. 
Keywords: Four bar structure
Low-frequency pre-compensation
Nonlinearity
Track following
Issue Date: 2012
Source: Guo, Y.,Gao, T.,Xie, L.,Du, C.,Ong, C. (2012). Track-following control of four-bar structured HDD via parameter-dependent pre-compensation. 2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look! : -. ScholarBank@NUS Repository.
Abstract: This paper considers track-following control of four-bar structured hard disk drive systems. Compared with the traditional single-arm HDD, four-bar structure potentially leads to higher achievable close-loop bandwidth, but also brings challenges in control design due to nonlinearity. In track-following control design, exact linearization is impossible in practice due to mechanic resonances and measurement constraint. In this paper, instead of exact linearization, we propose a kind of pre-filter to compensate for the low-frequency nonlinearities so that the compensated system has the same linear approximation at different track positions subject to different high-frequency resonances. With this pre-filter, many existing track-following control methods can be applied to the compensated plant. In this paper, H-infinity loop shaping is used and the simulation results show that the resulting controller preserves similar track-following performance at different track positions. © 2012 DSI.
Source Title: 2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!
URI: http://scholarbank.nus.edu.sg/handle/10635/73971
ISBN: 9789810720568
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

19
checked on Dec 9, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.