1. Robust Compensation for Dynamic Friction in Positioning Control of Hard Disk Drives
- Author
-
Shuzhi Sam Ge, Y.L. Lou, T.H. Lee, C.H. Huang, and Teck-Seng Low
- Subjects
Engineering ,law ,Control theory ,business.industry ,Dynamical friction ,Servomechanism ,Hard disk drive performance characteristics ,Low frequency ,Actuator ,Bang–bang control ,business ,Compensation (engineering) ,law.invention - Abstract
Friction in actuators of hard disk drives lowers the system gain in low frequency range, which prevents the system positioning accuracy from further improvement. The complexity and multiform of friction make it difficult to obtain a complete friction model. A nonmodel-based robust friction compensation method is introduced, in which the gain decrease in the low frequency domain is compensated by the infinite gain in a bang-bang compensator. The introduced method is simply integrated into the proximate time-optimal servomechanism controller widely used in the current hard disk drives. Simulation results based on a commercial FUJITSU hard disk are presented
- Published
- 1998
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