On-line bias estimator in hard disk drives

Details On-line bias estimator in hard disk drives On-line bias estimator in hard disk drives

2009-02-06

2010-06-01

Sniezek, Andrew L (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

07729081

ABSTRACT:
A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk of the drive. The drive includes a flex circuit that applies a bias force onto an actuator arm coupled to the head. The circuit includes a state estimator that provides a plurality of estimation errors and a bias estimator that creates a bias estimate. The bias estimate includes an average of the estimation errors and is a function of the flex circuit bias force. The bias estimate is used to create the control signal provided to the voice coil motor. The bias estimate reduces seek time during a seek routine.

REFERENCES:
patent: 7292403 (2007-11-01), Baek et al.
patent: 2007/0053095 (2007-03-01), Stoev et al.
patent: 2008/0100954 (2008-05-01), Kang
patent: 2009/0003146 (2009-01-01), Liu et al.

Affiliated with

Also associated with

Rating

On-line bias estimator in hard disk drives does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with On-line bias estimator in hard disk drives, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On-line bias estimator in hard disk drives will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4153794