Object positioning using discrete sliding mode control with vari

Details Object positioning using discrete sliding mode control with vari Object positioning using discrete sliding mode control with vari

1997-07-29

2000-04-04

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7809, 360 7702, G11B 5596, G11B 555

Patent

active

060468785

ABSTRACT:
Apparatus and method for improving vibration and mechanical shock response of a system through the use of discrete-time sliding mode control with variable parameters are disclosed. A servo circuit for positioning a control object (such as a head of a disc drive) includes a reference generator generating position and velocity references, an observer generating position and velocity estimates, and circuitry for determining position and velocity errors therefrom. Variable position and velocity gains are applied to the position and velocity errors, respectively, the position and velocity gains varying with respect to at least the magnitudes of the position errors.

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