In response to the requirements of aerospace electromechanical servo systems for fast step re-sponse,no overshoot and high steady-state accuracy during tracking continuously changing signals,a com-posite control is involved on the basis of position-speed-current triple closed-loop feedback control with intro-duction of feedforward control.The tracking accuracy of continuously changing signals without reducing the dynamic performance and stability of the system is improved by using this control strategy.The design meth-ods of closed-loop controller and feedforward controller are analyzed.Regarding the noise sensitivity of the feedforward function designed by invanance principle,a designed method based on error coefficient method is developed,and experimental verification is conducted.The experimental results show that the servo mech-anism system can respond to step commands quickly without overshoot.The system has good tracking accu-racy for continuously changing signals,and the system bandwidth has been expanded.The experimental re-sults demonstrate the effectiveness and practical feasibility of the control method proposed in this paper.
维普
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