A design of gust alleviation control system based on test of actuator&rsquo;s dynamic characteristics

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (4) : 106-112.

A design of gust alleviation control system based on test of actuator’s dynamic characteristics

YANG Yang，YANG Chao，WU Zhigang

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Abstract

The dynamic characteristics of servo actuator (Hitec-7954SH) being mounted in the flying-wing model for a gust alleviation test was tested with loads using a designed actuator testing system.The transfer function of the actuator was identified.The compensation control system was designed to compensate the amplitude attenuation and phase delay of the actuator.On this foundation, the gust alleviation control system was designed.The simulation showed that the responses of the flying-wing model in von Karman gust were effectively alleviated by the control system, but the gust alleviation control system was influenced by the actuator's dynamic characteristics, the gust alleviation effect of the designed control system was reduced because of the actuator's amplitude attenuation and the designed control system could aggravate the gust response at some frequencies because of the actuator's phase delay.The gust alleviation effect of the designed control system would be reduced without the compensation control system, and some responses would even be increased.Therefore, the actuator compensation control system for this actuator was very necessary.

Key words

aeroservoelasticity / actuator / dynamic characteristics / gust response / gust alleviation active control

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YANG Yang，YANG Chao，WU Zhigang. A design of gust alleviation control system based on test of actuator’s dynamic characteristics[J]. Journal of Vibration and Shock, 2020, 39(4): 106-112

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