Abstract

Aiming at the problem of parameter time-varying and external load force change in the electro-hydrostatic actuator (EHA), a scheme was proposed for quantitative feedback theory (QFT) controller with simulation following control (SFC). Design QFT controller based on the uncertainty range and the performance indexes without considering external load force. On this basis, design SFC controller to compensate external load and eliminate influence with external load force change. Simulation result showed that the proposed controller enhances the controller accuracy and robustness.

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