摘要
为分析悬架系统对车辆道路友好性的影响,设计出可提高道路友好性的主动悬架系统最优控制器,及可分析基于最优控制策略的主动悬架系统,以及被动悬架系统的道路友好性动态仿真模型,仿真分析得出车辆在两种典型的A、B级路面行驶时,基于最优控制策略的主动悬架系统及被动悬架系统车辆对路面造成的动载荷。利用动态载荷系数、动态载荷应力因子及95百分位综合四次幂力三种典型道路友好性评价指标对两种悬架系统的道路友好性进行分析比较。结果表明,采用动态载荷系数、动态载荷应力因子对悬架系统的道路友好性进行评价时,在A级路面上,主动悬架系统的道路友好性分别是被动悬架系统的1．5、1．6倍;在B级路面上主动悬架系统的道路友好性是被动悬架系统的1．5、2．5倍;采用95百分位综合四次幂力指标评价两种悬架系统的道路友好性时,在A级路面上,两种悬架系统的道路友好性相差无几;在B级路面上主动悬架系统的道路友好性比被动悬架系统提高2.5倍。因此,具有合理控制参数的基于最优控制策略的主动悬架系统可提高重型车辆的道路友好性。
In order to investigate the influence of suspension systems on road-friendliness of heavy vehicles, an optimal controller for improving road-friendliness and a simulation model for comparing road-friendliness of heavy vehicles with active suspension systems based on optimal control strategy and with passive suspension systems are designed. Through simulation, the dynamic tire forces generated by heavy vehicles with an active suspension system and a passive suspension system are obtained, respectively. Road damage criterion including dynamic load coefficient, dynamic load stress factor and the 95th percentile fourth-power force are used for the comparison of road-friendliness with two different suspension systems. The results show that road-friendliness of heavy vehicles with an optimal control strategy is improved by 1.5, 1.6 times on A-grade highways and 1.5, 2.5 times on B-grade highways when using dynamic load coefficient and dynamic load stress factor criterion. Two suspension system shows similar road-friendliness on A-grade highways when using the 95th percentile fourth-power force criteria, but active suspension systems can substantially increase road friendliness on B-grade highways by 2.5 times. It is concluded that active suspension system based on optimal control strategy with appropriate parameters can improve road-friendliness of heavy vehicles.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2007年第2期163-167,共5页
Journal of Mechanical Engineering
基金
山东省自然科学基金(Q99F11)
教育部留学回国人员基金
青岛大学人才引进科研启动基金资助项目
