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.