Research on Products Safety Evaluation Methodology of Spacecraft Assembly Process Based on Fuzzy Evaluation and AHP

The problems of quality and safety in AIT (assembly Integration and test), especially the damage of the crucial equipment or key parts, will have a great impact on quality, schedule, and cost of the spacecraft development process. Therefore, an engineering method of risk identification and prevention to evaluate the safety of key process in AIT is needed in order to improve the safety risk control ability for spacecraft. In this paper, we use the fuzzy comprehensive evaluation and analytic hierarchy process (AHP) method to construct the spacecraft assembly safety evaluation model. Based on the expert scoring, combining the multilevel fuzzy comprehensive evaluation method and directly scoring method, the weights of each evaluation index are analyzed and determined. After calculation, the risk value of the key activities for the spacecraft assembly process is obtained. The verification work on a certain type of spacecraft shows good effect that the assessment results accord with experience well and have high degree of distinction.