SysML-based Fault Diagnosis Method for Space Payload Systems

Aiming at the characteristics of high complexity and high reliability requirements of space payload systems, a fault diagnosis method based on SysML (System Modeling Language) is designed. The method incorporates the idea of MBSE (Model Based System Engineering), and proposes a failure analysis process of space payload system based on SysML. First, a failure analysis related model is established for the space payload system based on SysML, in which the SysML meta-model is extended and defined to meet the needs of failure analysis modeling, thus realizing the description of inter-component relationships and the relationship between the fault characterization and the directly related components. Then, an overall framework for fault diagnosis is constructed based on the constructed model, and the conversion logic from the SysML models to FTA (Fault Tree Analysis) is provided, thus finally obtaining all fault possibilities. Finally, this paper demonstrates the specific process of the method in practical application through case studies and verifies the effectiveness and practicality of the method.