电机多通道振动信号有损压缩的一种新方法

摘要

就多通道检测的电机振动信号提出了一种超复数离散余弦变换的有损压缩方法.检测实验是分析感应电机检测点上的X、Y、Z三正交轴上分别对应于3个通道的振动数据.该方法可以有效压缩三通道信号信息,提取信号本质特征,既保存采样点上信号之间的关联,又剔除噪声与冗余成分.实验证明其效果很好,为多通道数据提供了一种数据有损压缩与特征提取的新方法.%A new method for induction machine to compress its multichannel vibration signal data was proposed, which was based on hyper-complex number DCT (HC-DCT). In the experiment, the three signal data correspondent to orthogonal axes X, Y, Z were obtained by an acceleration sensor with three channels. The HCDFT-based method could compress the multichannel vibration signal effectively, and also preserve the association for the signals of each channel, eliminate the noise and redundancy, and extract the key features. The experiment results indicated its efficiency, moreover that it provided a new method for multichannel signals to data compression and feature extraction.