Research on Fault Injection Method for Testability Verification Test

Aiming at the problems of weak generality of fault injection method and inaccurate reproducibility of fault signal caused by abstract failure simulation method when fault injection is applied to complex equipment with high integration, a general fault injection method is proposed. Firstly, the principle and effectiveness of fault injection are analysed, and the mode and purpose of fault injection are defined. Then, the basic principles of three fault injection methods are studied to provide a basis for the research of general injector. Finally, a failure simulation method based on mixed signal model is proposed to achieve more accurate and simple fault reproduction. The fault injection method is applied to a certain type of control system. The results show that the method can provide comprehensive and accurate elements for fault signals to be simulated in the fault signal simulation stage, and improve the injection efficiency of fault samples in testability verification test. (paper)