关键词: 声学, 直升机, 旋翼, 桨涡干扰噪声, 主动控制

Abstract:

Rotor blade vortex interaction noise is one of the typical noise of helicopters, it will dramatically increase the overall noise level of a helicopter and bring severe noise pollution to the environment. Active control techniques are effective means to reduce rotor blade vortex interaction noise. A review of active control techniques for rotor blade vortex interaction noise reduction is presented. First, the active control techniques such as HHC, IBC, ACF and so on for helicopter rotor blade vortex interaction noise alleviation are introduced, and the development course and current situation of each technique is briefly summarized. Then the development and its tendency of the control algorithms adopted in these techniques is discussed with emphasis. Finally, development tendency of active control techniques for helicopter rotor blade vortex interaction noise alleviation is presented, and combined with the domestic research situation, key technologies and approaches to conduct the researches of active control techniques for helicopter rotor blade vortex interaction noise alleviation are pointed out.