Bypass interference signal frequency domain removal method based on motor fault diagnosis

A side branch interference signal frequency domain removing method based on motor fault diagnosis comprises the following steps that S1, a tested motor is shut down, a motor vibration signal in the shut-down state is collected through an acquisition card device, and an interference signal y3 is obtained through storage; s2, starting up the tested motor, acquiring a motor vibration signal by using acquisition card equipment, and storing to obtain an acquisition signal yn; s3, performing frequency domain analysis on the current acquisition signal yn and the interference signal y3; s3-1, converting the time domain signals of yn and y3 into frequency domain signals nn and n3 through Fourier transform; s3-2, removing an n3 part in the nn to obtain a frequency domain signal n1 of the normal signal; and S3-3, converting the frequency domain signal n1 of the normal signal to obtain an original signal y1. 一种基于电机故障诊断的旁支干扰信号频域去除方法，包括以下步骤，S1，被测电机停机，用采集卡设备收集停机状态下的电机振动信号，并保存得到干扰信号y3；S2，被测电机开机，用采集卡设备采集电机振动信号，并保存得到采集信号yn；S3，