7桥混连油气悬架车辆建模及多目标优化  

Modeling and multi-objective optimization of 7-axle hybrid hydro-pneumatic suspension vehicles

作　　者：田文朋 窦建明[2,3] 徐信芯 罗文翠[3] TIAN Wen-peng;DOU Jian-ming;XU Xin-xin;LUO Wen-cui(Aviation Technology Key Laboratory for Full-scale Aircraft Structures Static/Fatigue,Aircraft Strength Research Institute,Xi'an 710065;Construction Machinery school,Chang'an University,Xi'an 710061;Department of Mechanical&Electrical Engineering,Lanzhou Institute of Technology,Lanzhou 730050)

机构地区：[1]中国飞机强度研究所全尺寸飞机结构静力/疲劳航空科技重点实验室,陕西西安710065 [2]长安大学工程机械学院,陕西西安710061 [3]兰州工业学院机电工程学院,甘肃兰州730050

出　　处：《机械设计》2022年第4期115-122,共8页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51805041);兰州市人才创业项目(2016-RC-83)。

摘　　要：为获得某7桥登高车油气悬架的最优性能,设计了同侧并连+对侧交连的油气悬架混合耦连方案,并建立了整车20自由度非线性动力学模型,联合仿真分析车辆的平顺性和稳定性。通过层次分析法和极差变换标准化处理,建立包含车辆平顺性和稳定性两评价指标的优化函数,首次采用改进蚁群算法进行油气悬架系统参数优化运算,并与遗传算法参数优化结果对比。仿真对比结果显示,改进蚁群算法优化结果能够更好地抑制车身垂向-侧向耦合振动,对车辆平顺性和稳定性的改善效果较遗传算法提高了约10%。平顺性试验结果表明:加权加速度均方根较优化前大幅降低,证明了改进蚁群算法对于油气悬架参数优化问题的可行性和有效性;试验值与仿真值最大误差仅12.35%,验证了理论模型的正确性。In this article, a hybrid-coupling scheme of parallel connection & contralateral cross-link is designed, in order to obtain optimal performance of the 7-axle hybrid hydro-pneumatic suspension(HPS). The dynamic model with 20 degrees of freedom is set up. The vehicle’s ride comfort and stability are simulated and analyzed. The optimization function including two evaluation indexes of the vehicle’s ride comfort and stability is worked out by means of AHP and range transformation standardization. The improved ant-colony algorithm(IACA) is used to optimize the HPS system parameters for the first time. And it is compared with the optimization results obtained by the genetic algorithm(GA). Through a series of comparative analysis and simulation, it can be seen that thanks to the IACA optimization results, the HPS vertical-lateral coupling vibration can be restrained better and that the vehicle’s ride comfort and stability improve by about 10%,compared with those obtained by GA. The test results of ride comfort show that the root mean square(RMS) of weighted acceleration has greatly reduced. It’s concluded that IACA is feasible and effective in optimizing the HPS parameters. In addition, the maximum error between the test value and the simulation value was only 12.35%. It can be concluded that the theoretical model is correct.

关 键 词：7桥混连油气悬架 动力学模型 平顺性和稳定性 多目标优化 改进蚁群算法 

分 类 号：TH136[机械工程—机械制造及自动化]