- Title
- A factorization approach to sensitivity loop shaping for disturbance rejection in hard disk drives
- Creator
- Zheng, Jinchuan; Fu, Minyue; Du, Chunling; Wang, Youyi; Xie, Lihua
- Relation
- IEEE Transactions on Magnetics Vol. 46, Issue 5, p. 1220-1227
- Publisher Link
- http://dx.doi.org/10.1109/tmag.2010.2040921
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2010
- Description
- This paper investigates a factorization approach to sensitivity loop shaping for disturbance rejection in hard disk drives (HDDs). The advantage of the factorization approach is that the system sensitivity function can be expressed explicitly in terms of a unique design parameter. This greatly simplifies the control design process to make the system sensitivity function match a chosen target sensitivity function with guaranteed stability. By decomposing the controller structure, the design parameter is revealed to behave as a plug-in disturbance filter, the design of which is then presented to suppress the dominant disturbances at some specific frequencies. It is also shown that based on the nominal control system the proposed disturbance filter can reduce the sensitivity gains at specific frequencies without worsening the neighbouring sensitivity gains. Simulation together with implementation results demonstrate that the proposed method can effectively suppress the disturbances around the servo bandwidth and accordingly offers a superior tracking accuracy in comparison with other existing filters.
- Subject
- coprime factorization; disturbance filter; hard disk drive; positioning control
- Identifier
- http://hdl.handle.net/1959.13/927863
- Identifier
- uon:10273
- Identifier
- ISSN:0018-9464
- Rights
- Copyright © 2010 IEEE. Reprinted from IEEE Transactions on Magnetics Vol. 46, Issue 5, p. 1220-1227. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
- Language
- eng
- Full Text
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