Method and apparatus for performing an open-loop current shaping

Details Method and apparatus for performing an open-loop current shaping Method and apparatus for performing an open-loop current shaping

1998-03-06

2000-11-14

Grant, William

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Digital positioning

318560, 318701, 360 7807, G05B 1918, G05B 1101, H02P 146, G11B 5596

Patent

active

061482404

ABSTRACT:
Methods and apparatus for reducing overall seeking acoustics in a head-disk apparatus are disclosed. In accordance with one aspect of the present invention, a method for reducing overall seeking acoustics in a disk drive includes sending at least one current command sample to a power amplifier, prior to sending a full scale current command to the power amplifier. A seek current wave form with a smooth, non-linear rise is generated using the power amplifier such that the current command sample. In one embodiment, the full scale current command is arranged to cause the power amplifier to saturate. In another embodiment, the initial rise is a smooth, substantially bi-exponential initial rise.

REFERENCES:
patent: 4916635 (1990-04-01), Singer et al.
patent: 4937689 (1990-06-01), Seaver
patent: 5262907 (1993-11-01), Duffy
patent: 5291110 (1994-03-01), Andrews
patent: 5444583 (1995-08-01), Ehrlich
patent: 5465034 (1995-11-01), Andrews
patent: 5638267 (1997-06-01), Singhose
patent: 5696647 (1997-12-01), Phan
patent: 5852355 (1998-12-01), Turner
patent: 5901009 (1999-05-01), Sri-Jayantha
patent: 5923141 (1999-07-01), McHugh

Affiliated with

Also associated with

Rating

Method and apparatus for performing an open-loop current shaping does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for performing an open-loop current shaping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for performing an open-loop current shaping will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2074576