Servo control booster system for minimizing following error

Details Servo control booster system for minimizing following error Servo control booster system for minimizing following error

1979-07-26

1985-11-12

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Multiple mode systems

318594, 318601, 318619, 318603, G05B 1118

Patent

active

045530785

ABSTRACT:
A closed-loop feedback-controlled servo system is disclosed which reduces command-to-response error to the system's position feedback resolution least increment, .DELTA.S.sub.R, on a continuous real-time basis for all operating speeds. The servo system employs a second position feedback control loop on a by exception basis, when the command-to-response error .gtoreq..DELTA.S.sub.R, to produce precise position correction signals. When the command-to-response error is less than .DELTA.S.sub.R, control automatically reverts to conventional control means as the second position feedback control loop is disconnected, becoming transparent to conventional servo control means. By operating the second unique position feedback control loop used herein at the appropriate clocking rate, command-to-response error may be reduced to the position feedback resolution least increment. The present system may be utilized in combination with a tachometer loop for increased stability.

REFERENCES:
patent: 3458785 (1969-07-01), Sordello
patent: 3710222 (1973-01-01), Dummermuth
patent: 3798430 (1974-03-01), Simon et al.
patent: 3835360 (1974-09-01), Kiwiet
patent: 3953774 (1976-04-01), Sato et al.
Palmer, "Non Linear Feedforward Can Reduce Servo Settling Time", Control Engineering, Mar. 1978, pp. 53-55.

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