摘要
为改善某商用车的平顺性和道路友好性,在Matlab/Simulink环境中建立了包含驾驶员、驾驶室、发动机和承载车架在内的9自由度半车动力学模型。以驾驶员和车架的垂向加速度以及95百分位四次幂和力为性能优化指标,并采用层次分析法将各指标加权归一化为单目标函数,然后基于iSIGHT优化平台使用遗传算法对悬架刚度和阻尼进行了优化。结果表明:优化后悬架性能明显提高,驾驶员垂向加速度降低了18.15%,车架垂向加速度降低了6.03%,95百分位四次幂和力指标降低了6.70%,车辆的平顺性和道路友好性均得到有效改善。
In order to improve the ride comfort and road-friendliness of a commercial vehicle, a 9-DOF half vehicle dynamics model including driver, cab, engine and load-carrying frame is established with Matlab/Simulink. With the vertical accelerations of driver and frame and the 95 percentile fourth power aggregate force as performance optimization indicators, they are weighted, normalized and transformed into a single objective function by using ana-lytic hierarchy process. Then an optimization on the stiffness and damping of suspension is conducted with genetic algorithm based on iSIGHT platform. The results show that the performance of suspension is much better after optimization with the vertical vibration of driver and frame reduced by 18. 15% and 6. 03% respectively and the 95 percentile fourth power aggregate force decreased by 6. 70%, indicating the effective improvements in the ride comfort and roadfriendliness of the vehicle.
出处
《汽车工程》
EI
CSCD
北大核心
2014年第7期889-893,共5页
Automotive Engineering
基金
机械传动国家重点实验室科研业务费(SKLMT-ZZKT-2012M513)资助
关键词
商用车
悬架
平顺性
道路友好性
层次分析法
集成优化
遗传算法
commercial vehicle
suspension
ride comfort
road-friendliness
analytic hierarchy process
integrated optimization
genetic algorithm
