Pole mismatch compensation via feedback control approach

Details Pole mismatch compensation via feedback control approach Pole mismatch compensation via feedback control approach

2009-01-14

2011-12-13

Negron, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

C318S400350, C388S800000

Reexamination Certificate

active

08077421

ABSTRACT:
A system including an error signal generating module to generate an error signal based on (i) back electromotive force sensed from a motor and (ii) a predetermined speed of the motor. The error signal includes noise due to mismatched poles of the motor. A noise elimination module eliminates components of the noise having frequencies N times a frequency of rotation of the motor from the error signal and generates a corrected error signal, where N is an integer greater than or equal to zero. A control module generates a first control signal based on components of the corrected error signal, generates a second control signal based on components of the error signal, and rotates the motor at the predetermined speed based on (i) the first control signal and (ii) the second control signal. The components of the corrected error signal have higher frequencies than the components of the error signal.

REFERENCES:
patent: 7227321 (2007-06-01), Rana et al.
patent: 7573214 (2009-08-01), Sutardja et al.
patent: 7893643 (2011-02-01), Bonvin

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