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为了提高微耕机变速箱的传动性能和旋耕效率,针对变速箱的主要设计参数,建立了多轴式微耕机变速箱的优化设计数学模型。运用SGA、NSGA-Ⅱ算法和MATLAB语言编制了变速箱关键设计参数的优化程序,使用该程序对数学模型进行优化求解并比较结果。优化结果表明,采用SGA和NSGA-Ⅱ算法进行优化,体积分别减少了14.13%和15.96%,重点啮合齿轮重合度提高了4.07%和4.60%,取得较好的优化效果;其中,采用NSGA-Ⅱ算法比SGA算法在优化结果上更优秀。
In order to improve the transmission performance and rotary-tilting efficiency of a tiller, a mathematical model of optimal design for a multi-shaft tiller was established according to the main design parameters of the gearbox. Using SGA, NSGA-Ⅱ algorithm and MATLAB language, the optimization program of key design parameters of gearbox is compiled. The program is used to optimize the mathematical model and compare the results. The results of optimization show that the optimization results of SGA and NSGA-Ⅱ are 14.13% and 15.96% respectively, and the coincidence degree of key meshing gears is increased by 4.07% and 4.60% respectively. The optimized results are obtained by using NSGA-Ⅱ The algorithm is better than the SGA algorithm in optimizing the results.