Title: Power transmission
Application Number: 87107341 Application Date: 1987.12.05
Publication Number: 1018987 Publication Date: 1988.06.15
Approval Pub. Date: 1991.01.02 Granted Pub. Date: 1991.01.02
International Classifi-cation: G05B15/00;G05D3/00
Applicant(s) Name: Vickers Inc. Address:
Inventor(s) Name: Richard S. Leemhuis;Yehia M. Ei-Ibiary
Attorney & Agent: WANG ZHONGZHONG
Abstract:
    A power servo system which includes an actuator coupled to a load and receives an input command signal indicative of desired motion at the load. A sampled-data control system receives and samples input signals indicative of desired and actual motion at the hydraulic actuator and load, and provides control signals to the actuator necessary to obtain desired motion. The sampled-data control system includes digital processing circuitry with series and feedback compensation, coordinated with the hydraulic system transfer function. Different equation constants in the series and feedback compensation circuitry are recalculated periodically. In one embodiment of the invention, such constants are recalculated as a function of system behavior, so that system control automatically varies with operating conditions.
Time: 3