- The Society of Instrument and Control Engineers
- 計測自動制御学会論文集 (ISSN:04534654)
- vol.29, no.1, pp.71-77, 1993-01-31 (Released:2009-03-27)
The purpose of the head positioning control of hard disk drives is to move the magnetic head onto the desired track swiftly and to keep it on track precisely against various disturbances and plant uncertainty at high frequency. In this paper, we apply H∞ control to the head positioning of hard disk drives. The advantage of H∞ control is that it yields robust feedback system and the trade-off between various specs is easily incorporated into the design. Further, to obtain a good transient response, we adopt the two-degree freedom control scheme. Experimental results are presented to demonstrate the control effects.