Testability simulation method based on aviation airborne system function performance model

The invention relates to a testability simulation method based on a functional performance model of an aviation airborne system, which comprises the following steps: S1, acquiring information of the functional performance model of the aviation airborne system, and carrying out testability simulation design; s2, establishing a functional performance model of the aviation airborne system by using a state-space equation method; s3, designing a testability diagnosis model of the aviation airborne system according to the state update space and the perception measurement space of the aviation airborne system; s4, analyzing a fault mode of the aviation airborne system according to the test fault simulation list, and updating a fault matrix; and S5, completing simulation of the aviation airborne system testability diagnosis model, and recording an analysis result. According to the invention, aiming at the testability design characteristic representation of the aviation airborne system, the digital form representation