Magnetic disk drive with feedback control

Details Magnetic disk drive with feedback control Magnetic disk drive with feedback control

2007-01-09

2007-01-09

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

11083887

ABSTRACT:
A feedforward control system using a polynomial formula not affected by discretization error is realized in a magnetic disk drive. In one embodiment, the magnetic disk drive is intended to move a head for performing at least one of recording and playback to and from a magnetic recording medium to a target position. The feedforward input has a seek control system computed by a polynominal formula of a time function. The coefficients of the polynomial formula have been derived from boundary conditions including the characteristics of a zero-order hold.

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patent: 2002/0041459 (2002-04-01), Singer et al.
patent: 2003/0147172 (2003-08-01), Singer et al.
patent: 03-233609 (1991-10-01), None
patent: 05-143165 (1993-06-01), None
patent: 2000-123502 (2000-04-01), None

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