Classic spectrum estimation processing method and system for insulator crack acoustic vibration signals

The invention discloses a classical spectrum estimation processing method and system for insulator crack acoustic vibration signals. Aiming at signal processing and defect discrimination of insulator detection signals based on a vibration acoustic method, a smooth average periodogram method is provided to carry out power spectrum estimation on the insulator detection signals so as to obtain a power spectrum of the insulator detection signals; judging whether the insulator detection signal has defects or not according to each peak frequency and amplitude and the basic resonant frequency and amplitude of the insulator; compared with traditional spectrum estimation, the classic spectrum estimation based on the smooth average periodogram method has the advantages that the problems of spectrum aliasing and energy leakage are solved, and the spectral line resolution and the variance performance are improved. According to the invention, a smooth average periodogram method is adopted to carry out spectrum analysis on