1results about How to "Obvious fault features" patented technology

The application discloses a gear transmission system vibration signal immediate dense fault characteristic component decomposition system and method, comprising: a fault characteristic order library unit, an envelope signal generation unit, an arbitrary order harmonic decomposition unit and a monitoring index construction unit, wherein: the fault characteristic order library unit calculates the fault characteristic order of the measured vibration signal by using the existing gear dynamics and kinematics knowledge; the envelope signal generation unit carries out time-varying filtering on the signal components near the instantaneous meshing frequency on the time-frequency surface of the measured vibration signal, and calculates the modulation component of the instantaneous meshing frequency component; the arbitrary order harmonic decomposition unit determines the instantaneous frequency of each fault characteristic component according to the input shaft speed and the fault characteristic order, and obtains the time domain waveform of each fault characteristic component by using an optimization algorithm to jointly solve all positioned fault characteristic components; and the monitoring index construction unit constructs a targeted health index according to the time domain waveform of the fault characteristic component, which is used for state monitoring of the transmission system. Under the conditions of strong time-varying working conditions and strong noise, the application can accurately extract multiple signal components adjacent to each other on the time-frequency surface and generate a monitoring index used for state monitoring of the gear transmission system at a low calculation cost.