Conference Proceeding

Design of seek control of hard disk drive using discrete-time sliding mode control

Dept. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea
10/2004; DOI:10.1109/CCA.2004.1387266 ISBN: 0-7803-8633-7 pp.533 - 538 Vol.1 In proceeding of: Control Applications, 2004. Proceedings of the 2004 IEEE International Conference on, Volume: 1
Source: IEEE Xplore

ABSTRACT We present a modified improved time-optimal sliding-mode control of hard disk drives. A second order velocity reference profile is used with a linear region as the conventional proximate time-optimal servomechanism. In a nonlinear velocity region, time varying sliding surface is used while in a linear region, a fixed time invariant sliding surface is used. We have obtained improved seek performance over the previous results using discrete-time sliding mode proximate time-optimal seek control. We show that it is applicable in the presence of unmodeled dynamics and parameter variations. Its effectiveness is verified with simulation results.

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Keywords

conventional proximate time-optimal servomechanism
 
discrete-time
 
fixed time invariant
 
mode proximate time-optimal
 
previous results
 
second order velocity reference profile
 
time varying
 
time-optimal sliding-mode control
 
unmodeled dynamics
 

Chung Choo Chung