Multi-objective reliability optimized design of planetary gear accelerator on a weft insertion device with magnetic force

On the consideration of the shortage of common optimized design method for planetary gear accelerator on a weft insertion device with magnetic force,a reliability optimized design method was proposed,which took gears′ stress and strength as random variables.Based on comprehensive considerations of the loading capacity,compact structure,light-weight and transmission efficiency of the planetary gear accelerator,its multi-objective reliability optimized design model was set up,in which,the smallest volume and highest efficiency of the mechanism were taken as the objective functions,while reliability conditions of planetary transmission and gears′ fatigue strength,and the kinematic and geometric conditions of the planetary transmission were taken as constraints.Then the goal programming and sequential quadratic programming algorithm in optimization toolbox of MatLab were used to solve the model.Compared with the common optimized design schemes,the volume of the planetary gear accelerator reduces by 19.42% while its efficiency is improved,which shows that this design method is practical,reliable and effective.