典型文献
Experimental study on transfer functions of an active rotor under different flight conditions
文献摘要：
Vibrations impose negative impacts on the effectiveness and public acceptance of heli-copters.Active rotors with trailing-edge flaps have been proved to be an effective way to actively eliminate helicopter vibrations.For the existing control algorithm based on offline system identifi-cation,the transfer functions of an active rotor under different flight conditions are pre-requisites to implement closed-loop vibration control.In this study,a three-bladed active rotor with improved trailing-edge flaps is designed,and wind-tunnel tests are conducted to identify the transfer functions of this active rotor using frequency sweep and phase sweep methods.The experimental results demonstrate that these transfer functions are insensitive to the variation of flight speeds:the ampli-tude of the transfer function varies slightly,while the phase delay almost remains unchanged.In addition,this finding is validated through closed-loop vibration control tests with the active rotor.The transfer function obtained from the hover test results is also applicable to closed-loop vibration control tests under the forward flight conditions.This will dramatically simplify the implementation and operation of an active rotor.
文献关键词：
中图分类号：
作者姓名：
Jinlong ZHOU;Linghua DONG;Weidong YANG
作者机构：
National Key Laboratory of Rotorcraft Aeromechanics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
文献出处：
引用格式：
[1]Jinlong ZHOU;Linghua DONG;Weidong YANG-.Experimental study on transfer functions of an active rotor under different flight conditions)[J].中国航空学报（英文版）,2022(08):107-120
A类：
heli,copters,hover
B类：
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AB值：
0.519342
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