Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
1997-01-31
1999-11-30
Sircus, Brian
Electricity: motive power systems
Positional servo systems
With stabilizing features
318611, G05B 501
Patent
active
059948680
ABSTRACT:
A driving circuit for generating a motor driving voltage has a positive feedback loop for feeding back the motor driving voltage through a filter. The filter is arranged so as to have a transfer function given as G.sub.F (s) which (1) satisfies G.sub.F (s).apprxeq.1 in a frequency band in which disturbances should be suppressed while (2) satisfies .vertline.G.sub.F (s).vertline.<.vertline.G.sub.open .vertline. in a full range of frequencies, where G.sub.open represents an open loop transfer function of a motor control device in which a positive feedback loop is not provided. With this arrangement, it is possible to suppress disturbances, irrelevant to motor characteristics which may vary. Besides, it is possible to provide a motor control device in which computations for disturbance compensation are considerably decreased.
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"Precision DTF (Dynamic Track Following) Control System--High-Accuracy Tracking Control System with the use of Movable Head", by H. Takeuchi et al., Paper for Lecture at Spring Meeting of Institute of Precision Engineering, pp. 1071-1072.
"Precision DTF Control System--High-Accuracy Tracking Control System and Method of Head Movement Suspension During Non-Scanning Period" by H. Takeuchi et al., Paper for Regular Lecture in Kansai Area of Institute of Precision Engineering 1996, pp. 37-38.
Precision DTF Control System Using Observer and Modified Observer by Hiroaki Takeuchi et al., 39th Lecture of Federation of Automatic Control (Oct. 17, 1996), pp. 91-92.
Okuda Tohru
Takeuchi Hiroaki
Sharp Kabushiki Kaisha
Sircus Brian
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