Closed-loop vibration control simulation of a helicopter active rotor with trailing-edge flaps based on the weighted-least-squares-error identification method

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (4) : 237-244.

ZHOU Jinlong1,DONG Linghua1,YANG Weidong1,LIU Shiming2

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Abstract

An active rotor is effective active vibration control for helicopters.Focusing on closed-loop vibration control of an active rotor with active controlled flap (ACF),a coupled aero-elastic model with ACF was developed.Open-loop control simulation for the ACF was conducted through amplitude sweep,frequency sweep,and phase sweep,and their influence on rotor vibratory loads was studied.The higher harmonic control algorithm was employed in the closed-loop control simulation,while the weighted-least-squares-error (WLSE) method was used to identify the transfer matrix of the active rotor system.Actuator saturation was also taken into account using the auto-weighting method.The controller demonstrates satisfying control performance,and the vertical vibratory load of passing frequency is reduced by up to 87%.The simulation results will be useful to direct the engineering implementation of the closed-loop control system for the active rotor.

Key words

rotor / helicopter / vibration control / control simulation / active rotor / WLSE

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ZHOU Jinlong1,DONG Linghua1,YANG Weidong1,LIU Shiming2. Closed-loop vibration control simulation of a helicopter active rotor with trailing-edge flaps based on the weighted-least-squares-error identification method[J]. Journal of Vibration and Shock, 2019, 38(4): 237-244

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