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基于对液力自动变速器(AT,Automatic Transmission)的行星齿轮机构和换挡元件方案的运动学分析,提出了一种可实现换挡元件方案自动优选的智能算法.该方法不同于传统的方案设计方法,采用遗传算法来优化行星齿轮机构的特性参数,并根据换挡元件闭合顺序给出相应方案的偏移值,提出了换挡元件方案优选算法的适应度函数,实现了传动比优化和换挡元件闭合有序化的同步设计,从而缩短方案设计周期.基于MATLAB运算平台,实现了对ZF-8AT的换挡元件方案的优选,得到了3组最优换挡元件方案.结果表明,该算法有效地实现换挡元件方案设计.
Based on the kinematics analysis of the planetary gear mechanism and shift element scheme of automatic transmission (AT), a smart algorithm that can automatically optimize the shift element scheme is proposed, which is different from the traditional scheme design Method, the genetic algorithm is used to optimize the characteristic parameters of the planetary gear mechanism, and the offset value of the corresponding scheme is given according to the closure sequence of the shifting element. The fitness function of the optimization algorithm of the shifting element scheme is proposed, which optimizes and changes the gear ratio The block synchronization of the order closure of the design, thereby shortening the design cycle.Based on the MATLAB platform, the optimization of the ZF-8AT’s gear shift element scheme has been achieved, and three sets of optimal gear shift scheme have been obtained.The results show that the The algorithm can effectively realize the design of the gear shift element.