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以东风某越野车为样车,利用多学科优化软件iSIGHT集成ADAMS/Car,建立了独立悬架运动学仿真集成流程,提出了同时考虑悬架轮跳时定位参数变化量与变化趋势要求的悬架优化目标,并通过DOE分析与NSGA-II遗传算法实现了悬架多目标优化。为提高优化效率,利用Kriging方法建立了高精度的近似模型进行优化。结果表明:优化后两种模型的仿真曲线都向目标特性曲线靠近,优化效果良好;且采用Kriging近似模型计算速度得到极大提高。基于近似建模方法,通过多目标遗传算法和仿真集成技术,可大大提高系统设计的效率。
Taking Dongfeng off-road vehicle as a sample vehicle, the integration process of kinematics simulation of independent suspension was established by integrating iSIGHT with multidisciplinary optimization software ADAMS / Car. A suspension method was proposed to consider the variation of positioning parameters and the changing trend of suspension suspension The objective of optimization was optimized and the suspension multi-objective optimization was realized through DOE analysis and NSGA-II genetic algorithm. In order to improve the optimization efficiency, Kriging method is used to establish a high-precision approximate model for optimization. The results show that the simulation curves of the two models are close to the target characteristic curve after optimization, and the optimization results are good. Moreover, the speed of calculation using Kriging approximation model is greatly improved. Based on the approximate modeling method, through multi-objective genetic algorithm and simulation integration technology, can greatly improve the efficiency of system design.