G - Physics – 05 – B
Patent
G - Physics
05
B
341/97
G05B 19/19 (2006.01) F15B 9/03 (2006.01) G05B 19/42 (2006.01)
Patent
CA 1206560
Abstract of the Disclosure An electro-hydraulic servo control system which in- cludes a servo actuator adapted to variably position a load mass, and an actuator control system which includes a sensor coupled to the actuator for providing an indica- tion of measured actuator position and a digital observer responsive to measured actuator position for estimating velocity and acceleration at the actuator. Signals in- dicative of measured actuator position, estimated velocity and estimated acceleration are fed to a comparator, together with a position command signal, for obtaining a difference or error signal to provide a control input to the actuator. The observer electronics includes digital computation means suitably programmed to estimate posi- tion, velocity and acceleration as solutions to three linear equations with three unknowns. Equation constants, which are functions of actuator and driven mass physical characteristics, are entered through operator-adjustable resistors. The actuator position and error input signals are periodically sampled and stored as inputs to the observer electronics. The observer electronics also embodies a self-test feature to facilitate maintenance in the field.
430785
Delmege Arthur H.
El-Ibiary Yehia M.
Rode Melvin A.
Taplin Lael B.
Marks & Clerk
Vickers Incorporated
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