Apparatus and method for minimizing limit cycle using complement

Details Apparatus and method for minimizing limit cycle using complement Apparatus and method for minimizing limit cycle using complement

1989-09-25

1991-05-14

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With stabilizing features

318585, 318584, 36441301, 250201, G05B 501

Patent

active

050159348

ABSTRACT:
The apparatus controls the positioning of a device in response to a commanded input signal, and comprises an element for moving the device in response to an error signal. A sensor component determines the actual position of the device, the sensor component outputting a primary signal and a derivative signal corresponding to the actual position and velocity of the device, respectively. A complementary filter system filters the primary signal and the derivative signal to generate a derived position signal, the derived position signal being combined with the commanded input signal thereby generating the error signal. The filtering results in effectively increasing the resolution of the sensor component thereby reducing the limit cycle caused by quantization of the sensor component.

REFERENCES:
patent: 4148452 (1979-04-01), Niessen et al.
patent: 4463375 (1984-07-01), Macovski
patent: 4667090 (1987-05-01), Carreras et al.
patent: 4697768 (1987-10-01), Klein

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