Servo control system operable on digital basis

Details Servo control system operable on digital basis Servo control system operable on digital basis

1980-04-28

1982-01-26

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318603, G05B 101

Patent

active

043130747

ABSTRACT:
A digital servo control system is responsive to a command signal indicative of a command position of a moveable element and to a phase modulated signal corresponding to the angle of rotation of a motor controlling said moveable element to develop a motor drive signal to position the motor. The system provides control during a velocity control mode and a position control mode, the latter occurring after the moveable element is moved to a predetermined small incremental distance from the commanded position. During the velocity control mode the motor is driven in accordance with a reference velocity selected in dependence upon the position error signal. Following a prescribed time after entry into the position control mode, the position error has added thereto an integration signal which increases in the same sense as the position error.

REFERENCES:
patent: 3519904 (1970-07-01), Rogers
patent: 3728607 (1973-04-01), Isak
patent: 3954163 (1976-05-01), Gabor
patent: 4226546 (1980-10-01), Hoffman

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