FDIR hierarchical software architecture supporting online fault diagnosis

The present invention provides an FDIR hierarchical software architecture supporting online fault diagnosis. The FDIR hierarchical software architecture is applied to an aerospace system and comprisesa hardware unit layer, a subsystem layer, a task system layer and a fault diagnosis layer, wherein each of the hardware unit layer, the subsystem layer, the task system layer and the FDIR layer comprises an FDIR management module, an FDIR module and a data communication module, the FDIR management module is used for managing the FDIR modules of a current layer and an adjacent layer, the FDIR module is used for fault detection, identification and recovery of the current layer, and the data communication module is used for carrying out the inter-module communication on the current layer and between layers. The FDIR hierarchical software architecture can meet the autonomous fault diagnosis and recovery requirements of different types of spacecrafts, supports the local fault diagnosis and recovery and the fault diagn