Patent ID: 6304408
Filing Date: 2001-10-16
Classification: G11B

Abstract:
A method of controlling the position of a read/write head in a hard disk drive unit, said method comprising the steps of:based on a fuzzy logic rule-based algorithm, generating a desired delta signal for a seek mode of operation in response to a current relative position signal and a current delta signal;comparing said desired delta signal and said current delta signal;based on said comparing step, generating a seek mode activation signal;based on a second fuzzy logic rule-based algorithm, generating a track mode activation signal for a track mode of operation in response to said current relative position signal;selecting said seek mode activation signal or said track mode activation signal based on said current position signal and said delta signal; andgenerating a drive current responsive to the selected signal and applying this drive current to an actuator, to move the read/write head toward a desired position.