A Frequency Fault Injection Technology for Sine Signals Based on Spectrum Separation

In the testability test of avionics system and equipment, fault injection work needs to be carried out for sine signal frequency parameters.At present, there is no effective means. This paper analyze the spectrum structure of sinusoidal signal, and design a frequency fault injector based on the method of spectrum separation. Without changing the amplitude and mean value, the on-line control of sinusoidal signal frequency fault is realized. The online fault injection test results show that the method is stable, and the control error of amplitude mean and frequency satisfies normal distribution at 0.05 significance level, which can meet the actual engineering requirements.