基于阿克曼率的整车操稳性研究

阿克曼特性对整车操稳性具有重要影响。对市面上某款轿车前悬架总成进行研究,在ADAMS/Car中建立多体动力学模型,并根据台架试验对悬架模型进行了验证,通过仿真分析发现悬架的阿克曼转角缺陷。针对这一问题,综合运用灵敏度分析、曲线回归拟合、加权平方和优化算法,对悬架的硬点调整实现优化设计。试验结果表明,该方法有利于提升悬架的整车操稳性。对工程实践和底盘悬架设计有一定的参考价值。

Research on Vehicle Stability Based on Ackerman Rate

Ackerman characteristics have important influence on stability of the vehicle.This paper studies the front suspension assembly of a car on the market,establishes a multi-body dynamics model in ADAMS/Car,verifies the suspension model according to the bench test,and finds the Ackerman corner defect of the suspension through simulation analysis.In order to solve this problem,sensitivity analysis,curve regression fitting and weighted square sum optimization algorithm were combined to adjust the hard points of the suspension to achieve optimal design.The test results show that this method is beneficial to improve the stability of the suspension.It has certain reference value for engineering practice and chassis suspension design.