Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1983-05-09
1986-07-15
Roskoski, Bernard
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318561, 318696, 360 78, G05B 1910
Patent
active
046008683
ABSTRACT:
An open loop controller for the stepper motor of a disk drive actuator is programmed to supply pulse width modulated drive voltages for energizing and de-energizing successive phases of the stepper motor at controlled rates during the initial and final phases of each actuator seek, thereby controlling the acceleration and deceleration profiles of the actuator to reduce its mid-frequency resonance, settling time and position hysterysis.
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Kordik, Kenneth S., "Reducing Overshoot and Oscillation in Variable Reluctance Step Motors," Proceedings, Ninth Annual Symposium on Incremental Motion Control Systems and Devices, University of Illinois, Jun. 2-5, 1980, pp. 65-78.
Charles K. Taft, William Banister, & Edwin Slate, "Pulse-Width Modulation Control of DC Motors," University of New Hampshire, place published unknown, date published unknown but prior to May 9, 1983.
Keane Patrick C.
Roskoski Bernard
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