Research on Health Assessment System of Aircraft Power Supply System

The role of aircraft power supply system on flight safety is irreplaceable, and the lack of system-level assessment makes it necessary to assess its health status. The paper puts forward the concept of failure mode degradation state value, unifies the research route of equipment health assessment based on failure and degradation, proposes a calculation method for the importance of model nodes, and establishes a hierarchical model of aircraft power supply system health assessment. According to the comprehensive evaluation characteristics of the multi-attribute indicators that are coupled to the status of each component of the power supply system, the cloud model, entropy weight method and TOPSIS (Technique for Order Preference by Similarity to an Ideal Solution) are used to comprehensively calculate the risk ranking of failure modes. And the proportion, the influence weight of each layer model node on the upper layer node is obtained, and the comprehensive risk evaluation is completed. Then, according to the degradation degree of the failure mode degradation state value, the entropy weight method is used to improve the weight of the failure mode degradation state value, and the effectiveness of the evaluation algorithm is evaluated and improved. Finally, the health status of each subsystem and the health of the equipment are displayed with a radar chart, evaluation result. It provides an effective implementation path for the health assessment of the aircraft power supply system.