Active control for stabilizing a servo-controlled actuator syste

Details Active control for stabilizing a servo-controlled actuator syste Active control for stabilizing a servo-controlled actuator syste

1998-03-30

2000-05-16

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7703, 318561, 318610, 318615, G11B 2110

Patent

active

060645407

ABSTRACT:
An active control mechanism and method for stabilizing a servo-controlled actuator system such as an actuator system in a data recording disk drive by compensating the vibrational modes of the actuator's arm assembly. The control mechanism has a sensing arrangement which can include one or more individual sensors attached to the actuator at locations where they generate signals in phase with the vibrational modes, and especially with all the major vibrational modes, of the arm assembly. A control mechanism derives from the signals an adjustment signal consisting of three corrective terms--a stiffening correction, an active damping correction and an inertia reduction correction--and the adjustment signal is used in the feedback control loop to stabilize the actuator system.

REFERENCES:
patent: 4093885 (1978-06-01), Brown
patent: 4922159 (1990-05-01), Phillips et al.
patent: 5426545 (1995-06-01), Sidman et al.
patent: 5459383 (1995-10-01), Sidman et al.
Kobayashi, M. et al., MR-46 Carriage acceleration feedback multi-sensing controller for sector servo systems, Interntl. Conf. on Micromechanics for Info. and Precision Equip., Tokyo, pp. 475-480, Jul. 20-23, 1997.

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