Control system for two-stage actuator

Details Control system for two-stage actuator Control system for two-stage actuator

1997-08-26

2000-07-11

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7809, G11B 5596

Patent

active

060881879

ABSTRACT:
A control system for a two-stage actuator for a disk drive, including a coarse actuator having a voice coil motor as a driving device mounted on a base of the disk drive, a microactuator mounted on the coarse actuator and carrying a head at a front end portion, a coarse actuator controller for controlling driving of the coarse actuator, and a microactuator controller for controlling driving of the microactuator. The control system further includes a feedback device for calculating a position error between a target position and an observed position of the head, and inputting the position error into the coarse actuator controller and the microactuator controller. The displacement of the microactuator relative to the coarse actuator is not input into the coarse actuator controller.

REFERENCES:
patent: 5189578 (1993-02-01), Mori et al.
patent: 5452153 (1995-09-01), Baheri et al.
patent: 5452275 (1995-09-01), Ogawa
patent: 5521778 (1996-05-01), Boutaghou et al.
patent: 5834864 (1998-11-01), Hesterman et al.

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