Selection of shifting element design based on genetic algorithm

Based on the kinematic analysis of planetary gear mechanism and shifting element, an intelligent algorithm applied for selection of the shifting element design of automatic transmission was presented. Unlike traditional design methods, the characteristic parameters of the planetary gear mechanism were optimized based on genetic algorithm. According to the condition of the shifting logical, the offset value of the design was defined, and the fitness function of the shifting element design optimal algorithm was constructed. This method took the ratio sequence and shifting logical into account at the same time to shorten the design cycle. Based on MATLAB, selection of the shifting element design of ZF-8AT was realized and 3 optimal shifting element designs were obtained. The results demonstrate that the selection algorithm proposed is effectively able to realize shifting element design.