Zero error digital servo system

Details Zero error digital servo system Zero error digital servo system

1989-11-13

1991-11-12

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318652, 318480, G05B 106

Patent

active

050650815

ABSTRACT:
A zero error digital servo system where positioning is achieved by minimizing the positioning error value to zero. Stable logic states of sensors is used to achieve positioning instead of zero crossing of the error signal value. The magnitude of positioning error is reduced to a zero value by unique design of the digital encoder and positioning of the sensors. Stable logic states of the sensors indicates true position of the encoder with reference to the encoder sensors. Any deviation of the encoder from the true position is immediately detected by change in the logic states of the sensors. The technique can be used for both rotary as well as linear encoders.

REFERENCES:
patent: 2968756 (1961-01-01), Devol
patent: 3324369 (1967-06-01), Markakis
patent: 3358202 (1967-12-01), Pabst et al.
patent: 3795852 (1974-03-01), Favard
patent: 4511797 (1985-04-01), Pohlig et al.
patent: 4736140 (1988-04-01), Ernst

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