Method for detecting and suppressing random pulse interference in gearbox vibration signal

The invention discloses a method for detecting and suppressing random pulse interference in a gearbox vibration signal. The method comprises a random pulse interference boundary detection method based on a long-short time window feature ratio algorithm and a random pulse interference suppression method based on a median filtering algorithm. According to the method, variance features are adopted to describe data distribution difference between effective information of a gearbox vibration signal and random pulse interference, and a random pulse interference boundary is detected based on a long-short time window feature ratio algorithm and a detection threshold adaptive dynamic determination method; further, the detected random pulse interference is suppressed based on a determination criterion of a median filter length parameter and a median filtering algorithm, and effective information contained in the random pulse interference is obtained; and finally, the extracted effective information is used for reconstr