Servo operated digital positioning control system

Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos

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Details

318615, 318617, 318618, G05B 1300

Patent

active

044917767

ABSTRACT:
A closed loop servo operated digital control system in which a dynamically operable moveable member can be effectively and accurately controlled during movement from an initial position to a command position by compensating for both velocity error and for position error. A differential between a present measured position of the moveable member and a command position provides a position error signal. Present velocity is determined by computing position differential as a function of time. A velocity error signal is obtained by subtracting the determined velocity from a velocity command which is stored as a velocity command profile. The total error is the resultant sum of the position error and a velocity error and this sum is converted to an analog signal in order to power an amplifier/motor which, in turn, provides power for the control system.

REFERENCES:
patent: 3739158 (1973-06-01), Woodward
patent: 4031443 (1977-06-01), Droux
patent: 4168457 (1979-09-01), Rose
patent: 4263627 (1981-04-01), Rose
patent: 4268783 (1981-05-01), Murray
patent: 4311945 (1982-01-01), Aoyama
patent: 4355272 (1982-10-01), Wise
patent: 4366422 (1982-12-01), Rhodes

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