Improved proximate time-optimal sliding-mode control of hard disk drives

Author(s): J. Zhou ; R. Zhou ; Y. Wang ; G. Guo
DOI: 10.1049/ip-cta:20010694

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Author(s): J. Zhou ¹ ; R. Zhou ² ; Y. Wang ¹ ; G. Guo ²
- Affiliations: 1: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
  2: School of Electrical and Electronic Engineering, Data Storage Institute, Singapore
Source: Volume 148, Issue 6, November 2001, p. 516 – 522
DOI: 10.1049/ip-cta:20010694 , Print ISSN 1350-2379, Online ISSN 1359-7035

An improved proximate time-optimal (PTO) positioning control approach with discrete-time sliding-mode control theory for a Hard Disk Drive (HDD) servo is presented. A third order velocity reference profile is introduced to improve the second order ones in the conventional proximate time-optimal servomechanism (PTOS). The proposed approach eliminates the mode-switching mechanism and dramatically reduces the seek time by 5–50%. Moreover, it is robust to unmodelled dynamics and parameter variations. Its effectiveness is verified in a simulation.

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Improved proximate time-optimal sliding-mode control of hard disk drives

Improved proximate time-optimal sliding-mode control of hard disk drives

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