基于关联维数的交流接触器故障噪声起因分析

Cause analysis of AC contactor fault noise based on correlation dimension

将关联维数法引入交流接触器的故障噪声分析,采用互信息法和Cao方法来确定相空间重构的2个重要参数——延迟时间和嵌入维数,利用G-P算法分别计算短路环断裂、磨损、异物入侵、复位弹簧过硬4种不同原因产生的交流接触器故障噪声的关联维数,并与交流接触器正常运行的关联维数进行比较,判断交流接触器故障噪声的起因.实验结果表明,不同故障造成的交流接触器噪声的关联维数是不同的,交流接触器故障噪声关联维数能作为运行噪声起因的一个判据.

The correlation dimension method was introduced into the causes of the AC contactor fault noise analysis. The mutual information and Cao method decided two important parameters of the phase space re- construction--delay time and embedded dimension. G-P algorithm separately calculated AC contactor cor- relation dimension with short circuit ring fracture, wear, foreign matter invasion, stronger reset spring and compared with under normal operation to judge the causes of different AC contactor fault noise. The experi- mental results showed that correlation dimensions are different in the different fault state. The correlation dimension of AC contactor fault noise can be used as criterion to analyses the causes of running noise.