直升机舱内降噪技术研究

Cabin Noise Control Process of a Helicopter

舱内噪声问题是影响直升机竞争力的一个重要因素。以某直升机作为研究对象,将飞行噪声数据作为输入,分别从噪声预计技术、噪声被动控制技术、噪声主动控制技术三个方面开展直升机降噪技术研究,并根据理论分析和试验结果,实施了直升机舱内主动、被动综合降噪设计,以较小的重量代价,取得了试验室环境6dBA综合降噪效果,达到了预期目标。

Cabin noise level plays a key role to helicopter competition. This paper included describing the cabin noise reduce process of a helicopter base on test dataum, the noise level reach A 6dBA debate in anechoic room by using both active control method and traditional passive method.