论文部分内容阅读
提出了飞机涡轮发动机与螺旋桨引起客舱噪声的消除方法 ,采用自适应逆控制 ,基于X LMS滤波算法构造控制器 ,使之驱动的扬声器输出值对消拾音器附近即乘客头部周围的引擎和螺旋桨噪声 ,从而使乘客座位附近成为一块“无声带”。针对被控对象的扰动问题 ,还加入了对象扰动消除器 ,构成了集成的自适应逆噪声消除系统。实验表明 ,这是一个可靠的鲁棒系统 ,具有很好的消噪性能和抗扰能力 ,其降噪量不小于60dB。
The method to eliminate cabin noise caused by aircraft turbine engine and propeller was proposed. Adaptive inverse control was used to construct the controller based on the X LMS filtering algorithm. The output value of the loudspeaker driven by the turbocharger had an effect on the engine and propeller noise , So that the passenger seat near a “silent band.” In view of the disturbance of the controlled object, an object disturbance eliminator is also added to form an integrated adaptive inverse noise cancellation system. Experiments show that this is a reliable robust system with good noise canceling performance and anti-interference ability, and its noise reduction is not less than 60dB.