Apparatus and method for a reduced seek-to-track time fuzzy rule controller for a hard disk drive read/write head actuator

摘要

A controller for read/write head actuator of a hard disk drive system includes a feedback unit providing a voltage to a servo-actuator motor. The feedback unit includes a first fuzzy logic rule-based algorithm unit for the seek mode and a second fuzzy rule-based algorithm unit for the track mode. In the seek mode, the first algorithm unit, based on present position and delta (velocity) parameters, determines an optimum velocity. A signal representing the optimum velocity is compared with a signal representing the present velocity and an appropriate signals applied to the head actuator unit. The use of the fuzzy logic rule-based algorithm permits a near-minimum seek time even in the presence of non-linear and varying parameters. The output signal from the seek mode apparatus or the output signal from the track mode apparatus is selected based on position and velocity parameters.