Electricity: motive power systems – Positional servo systems
Patent
1991-10-31
1994-03-01
Ip, Paul
Electricity: motive power systems
Positional servo systems
318561, 360 75, 360 7806, 360 7804, G11B 2102
Patent
active
052911101
ABSTRACT:
A silent seek servo controller is used in a low profile miniature disk drive to minimize acoustic noise and the problems associated therewith. The silent seek servo controller of this invention reduces acoustic noise generation at the expense of seek performance. Since the silent seek servo controller of this invention minimizes acoustic noise, the controller helps to eliminate vibrations within the computer. The silent seek servo controller is a one mode continuous position servo seek controller that accelerates and decelerates the actuator using a smooth, continuous and completely symmetric acceleration trajectory. Specifically, for a seek time t, the disk drive actuator is accelerated for one-half the seek time, i.e, time t/2, and decelerated for the other half of seek time t. The peak acceleration occurs at time t/4 and the peak deceleration occurs at time 3t/4. The symmetry of each acceleration phase assures that any acoustic noise generated by uneven acceleration is eliminated.
REFERENCES:
patent: 4099112 (1978-07-01), Klinger
patent: 4133011 (1979-01-01), Kurzweil, Jr.
patent: 4134053 (1979-01-01), Klinger
patent: 4590526 (1986-05-01), Laatt et al.
patent: 4600868 (1986-07-01), Bryant
patent: 4697127 (1987-09-01), Stich et al.
patent: 4864437 (1989-09-01), Couse et al.
patent: 4937689 (1990-06-01), Seaver et al.
patent: 4956831 (1990-09-01), Sarrat et al.
patent: 5033037 (1991-07-01), Yanagi
patent: 5050146 (1991-09-01), Richgels et al.
patent: 5128812 (1992-07-01), Uno
patent: 5136440 (1992-08-01), Sidman
patent: 5136561 (1992-08-01), Goker
S. Hasegawa et al., "Fast Access Control of the Head Positioning Using a Digital Signal Processor", date unknown.
J. Tal, "Selecting Velocity Profiles for Servo Systems", Motion, pp. 3-7 (Sep./Oct. 1990).
Andrews, Jr. Thomas L.
Counts Gary E.
Integral Peripherals, Inc.
Ip Paul
LandOfFree
Low acoustic noise seeking method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low acoustic noise seeking method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low acoustic noise seeking method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-580714