Life prediction and risk assessment on the aircraft cable based on thermal damage features

Aiming at the operational risk caused by melting of aircraft cable insulation layer, an aircraft cable safety analysis method based on thermal damage characteristics is proposed. Based on the mechanism of cable thermal damage, two types of damage characteristics are defined, which characterize the influence and degree of cable thermal damage. Use thermal damage influence factor to indicate that cable thermal damage accelerates cable failure, and a method of cable life prediction is proposed. Meanwhile, the proportion coefficient mu is set to evaluate the applicability of the life prediction method. The life prediction results show that the cable life prediction method proposed owes higher accuracy, and comparison results show that the proposed method MTBF1 is more applicable in different operating areas. Moreover, a dynamic risk assessment model for aircraft cable is constructed from two perspectives, and the failure probability of cable is modified by the thermal damage influence factor. The risk assessment result is consistent with the experimental, which proves the effectiveness of the model.