Reliability evaluation method for small-sample power supply system

The invention discloses a reliability evaluation method for a small sample power supply system, and relates to the technical field of power supply system evaluation. The method comprises the followingsteps: S01, establishing a Simulink simulation circuit model: establishing simulation models for a linear power supply system and a Buck switching power supply system respectively by utilizing Simulink so as to replace a linear power supply board and a Buck switching power supply board; s02, determining a test sample of the power supply system: setting the input voltage of the power supply systemas Vin and the output voltage as Vout; s03, expanding according to the number of the degradation performance characteristic samples: obtaining a large number of simulation samples of the degradationperformance characteristics of the power supply system through Simulink simulation; and S04, evaluating the reliability of the power supply system. According to the method, performance degradation test data and Simulink simulat