Error detecting mechanism for servosystem

Details Error detecting mechanism for servosystem Error detecting mechanism for servosystem

1983-02-03

1985-06-18

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318565, 318663, 318603, 364184, 361 23, G05B 902

Patent

active

045243131

ABSTRACT:
The invention relates to a mechanism wherein a relative rotary angle of a driving motor is detected by use of an encoder, and, if an error occurs in a servo control action when the driving motor is servo-controlled in accordance with a deviation value of the relative rotary angle from a desired rotary angle of the driving motor, then the servo control action is brought to an emergency stop. A potentiometer for detecting an absolute rotary angle of the driving motor is connected to a rotary shaft of the driving motor and said emergency stop is effected when a difference between said absolute rotary angle and said relative rotary angle exceeds a preset tolerance value, so that an error in the servo control action can be reliably prevented.

REFERENCES:
patent: 3463979 (1969-08-01), Scobie et al.
patent: 4207507 (1980-06-01), Hermie
patent: 4364002 (1982-12-01), Suzuki et al.

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