Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos
Patent
1998-07-27
2000-01-11
Ip, Paul
Electricity: motive power systems
Positional servo systems
Adaptive or optimizing systems including 'bang-bang' servos
318592, 318594, 318603, G05B 1300, H02P 500
Patent
active
06013996&
ABSTRACT:
An improved stop control system and method are provided for a motor having a drive mechanism in which the motor is coupled to a motor controller that controls the speed and position of the drive mechanism using a first signal indicative of a commanded position of the drive mechanism, a second signal indicative of the actual speed of the drive mechanism and a third signal indicative of the actual position of the drive mechanism. The improved system/method uses a first circuit that receives the first and third signal and generates an error signal indicative of a difference therebetween. A second circuit receives the error signal and compares same with a threshold position error. The result of this comparison is used to selectively supply the second signal (i.e., speed) to the motor controller at least whenever the error signal is less than the threshold position error so that the motor controller can use the second signal in conjunction with the third signal to stop the motor.
REFERENCES:
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patent: 5404254 (1995-04-01), Kisaka
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David E. Howard and Justino Montenegro, Antiovershoot Position Control for Motors Run at Full Speed, NASA Tech Briefs, Feb. 1988, vol. 22 #2, p. 4b Motion Control Tech Briefs.
Howard David E.
Montenegro Justino
Broad, Jr. Robert L.
Ip Paul
The United States of America as represented by the Administrator
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