Servo control method and apparatus suitable for the same

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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C360S078040

Reexamination Certificate

active

07423838

ABSTRACT:
A servo control method of controlling a plant to track a reference trajectory with enhanced accuracy using a reference signal and its derivative signals, an apparatus and a recording medium suitable for same. The servo control method includes: determining a polynomial indicating a reference trajectory desired by a plant and derivatives of the polynomial; sampling a plant output with respect to a plant input; generating a reference signal and its derivative signals with reference to a time between samples (a relative time); and determining a plant input at a sampling time using the generated reference signal and its derivative signals, a delayed plant input and a delayed plant output. Accordingly, a plant is controlled to track a reference trajectory with enhanced accuracy using a reference signal and its derivative signals.

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patent: 6574070 (2003-06-01), Gregg
patent: 6873490 (2005-03-01), Guo et al.
patent: 7277764 (2007-10-01), Hovakimyan et al.
patent: 2006/0082922 (2006-04-01), Shih

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