基于Kriging近似建模的某越野车悬架多目标优化

Multi-objective Optimization to the Suspension of an Off-road Vehicle Based on Kriging Approximate Modeling

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。

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