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.

摘要：

旋翼桨涡干扰噪声是典型的直升机噪声类型之一，会显著增大直升机总体噪声水平，带来严重的环境噪声污染。主动控制技术是降低桨涡干扰噪声的有效手段之一。针对旋翼桨涡干扰噪声主动控制技术的研究情况进行概述。首先介绍高阶谐波控制（HHC）、独立桨距控制（IBC）、主动后缘襟翼控制（ACF）等桨涡干扰噪声主动控制技术的概念及产生过程；然后针对每种技术的发展历程及研究现状进行归纳总结；之后重点讨论桨涡干扰噪声主动控制所采用控制算法的发展趋势；最后对旋翼桨涡干扰噪声主动控制技术的发展趋势进行展望，并结合国内研究情况指出开展桨涡干扰噪声主动控制研究的关键技术及途径。

关键词: 声学, 直升机, 旋翼, 桨涡干扰噪声, 主动控制