Belief Reliability Evaluation of Thermal Performance of Electronic Products

When evaluating the thermal design of electronic equipment, there may be insufficient cognition of working environment and less data of thermal test, which will result in epistemic uncertainty. A method for belief reliability evaluation of thermal performance of electronic products under uncertain measurement was proposed. Critical performance parameters and threshold were identified based on function performance and margin analysis (FPMA), and thermal performance parameters were obtained by establishing a thermal performance digital prototype and carrying out simulation, then the belief reliability distribution of thermal performance parameters was given by quantification of uncertainty, the thermal performance reliability of electronic products was calculated finally. Taking a railway signal electronic product as a case study, the belief reliability of thermal performance was calculated.