Reactor neutron noise spectrum analysis method based on improved wavelet fractal algorithm

The invention discloses a reactor neutron noise spectrum analysis method based on an improved wavelet fractal algorithm. The method comprises the following steps: a, starting a reactor neutron noise spectrum analyzer; b, sending a neutron noise signal in the reactor to a computer system for storage by a synchronous data acquisition card; and c, based on fast Fourier calculation, improved wavelet calculation and improved fractal calculation, finally obtaining frequency spectrum characterization parameters matched with all frequency bands through the computer system. According to the reactor neutron noise spectrum analysis method based on the improved wavelet fractal algorithm, frequency band segmentation, spectrum analysis and spectrum parameter fractal representation of the reactor neutronnoise spectrum are realized by utilizing the characteristic that the improved wavelet fractal algorithm can process a non-stationary process, so that an auxiliary decision support means is provided for a reactor operator. 本发