Low frequency disturbance compensation control device and...

Details Low frequency disturbance compensation control device and... Low frequency disturbance compensation control device and...

2007-11-06

2007-11-06

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077070

Reexamination Certificate

active

11328114

ABSTRACT:
A servo control device for a disk drive capable of effectively compensating for a low frequency disturbance incoming to the disk drive is provided. The servo control device includes: a state variable estimator calculating a position estimation error based on a control input for controlling motion of a head and a position error signal by using a predetermined state equation; an estimation filter calculating a disturbance estimation value from the position estimation error by using a mathematical relation between a disturbance and the position estimation error; and a subtractor subtracting the disturbance estimation value from the control input.

REFERENCES:
patent: 6411461 (2002-06-01), Szita
patent: 7038877 (2006-05-01), Kohso et al.
patent: 2003/0058558 (2003-03-01), Ottesen et al.
patent: 2007/0064334 (2007-03-01), Jia et al.
patent: 1999-024805 (1999-04-01), None
patent: 10-2004-0052273 (2004-06-01), None

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