Abstract：To improve the accuracy of capacity analysis and prediction for automatic assembly equipment of aircraft,
a method of calculating the effective working hours of automatic assembly equipment based on the dynamic mixed Weibull
distribution model was proposed. According to the features of aircraft assembling, the dynamic mixed Weibull distribution
of availability with three parameters for automatic assembly equipment was established. Subsequently, effect of all subsystems
on the availability of whole equipment was analyzed. The dynamic weights of availability of subsystems were
calculated. Then, availability parameters of the dynamic mixed Weibull distribution were estimated in order to solve the
availability and the effective working hours of equipment. Finally, this method was tested on an automatic drilling & riveting
equipment from a wing panel assembly station, and the feasibility of proposed method was justified.
2017, 
