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A method is provided to eliminate the noise around driver's ears from heavy construction machinery such as grab and loading machinery caused by their powerful engine and hydraulic pump based on adaptive inverse control. A controller is constructed founded on X-filtering employing DCT/LMS algorithm to drive the loudhailer installed near the driving seat, whose output waves of the same frequency and magnitude with noise transmitted to the cab will counteract each other, due to so called destructive disturbing...

A method is provided to eliminate the noise around driver's ears from heavy construction machinery such as grab and loading machinery caused by their powerful engine and hydraulic pump based on adaptive inverse control. A controller is constructed founded on X-filtering employing DCT/LMS algorithm to drive the loudhailer installed near the driving seat, whose output waves of the same frequency and magnitude with noise transmitted to the cab will counteract each other, due to so called destructive disturbing effect, by which reducing the noise partly around the motorman's ears.

针对挖掘机和装载机等重型工程机械作业时发动机及液压泵振动产生的司机耳边强噪声 ,提出了一种基于自适应逆控制的消除方法。利用X -滤波DCT LMS算法构造控制器 ,使之驱动驾驶室内扬声器的输出声波具有与传播到驾驶室内的噪声相同的频率和振幅 ,且处于反相。当两声波相遇时 ,由于破坏性干扰作用 ,它们相互部分抵消 ,从而降低了司机耳边噪声

 

 


 
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