基于ADAMS的汽车多连杆独立悬架的参数优化及仿真

发布时间：2018-01-17 16:10

本文关键词：基于ADAMS的汽车多连杆独立悬架的参数优化及仿真　出处：《长春工业大学》2016年硕士论文　论文类型：学位论文

【摘要】：悬架参数是汽车操纵稳定性和平顺性的重要参数,其好与坏直接关系到车辆与行车人员在驾驶过程中的安全性。随着人们对车辆在驾驶过程中安全性能的要求提高,以及车企行业的不断壮大与发展,操稳性能获得了越来越多的关注。另一方面,由于计算机技术的不断进步,使学者们在车辆研发与测试过程中,拥有了一些优秀的虚拟样机技术手段,极大程度的缩减了研发成本与生产周期,本文就是以多体动力学原理为基础,借助虚拟样机技术对某车多连杆悬架进行仿真及优化分析,并取得了一些成果。具体如下:首先,在查阅了大量的国内外参考文献的基础上,描述了汽车悬架及其操稳性能在国内外中的发展历程,以及多体系统动力学原理在悬架性能分析中的理论。研究了多体系统动力学理论与ADAMS应用的相关技术。其次,以某多连杆悬架车型为例,通过ADAMS的CAR与INSIGHT模块对多连杆悬架进行建模,分别以悬架硬点各坐标位置对外倾角、前束和轮距的敏感度影响进行灵敏度分析,筛选出对悬架前束、外倾角、轮距影响较大的硬点,简化后续的优化的步骤、缩短了优化时间,提高了优化效率。再次,在详细地分析了粒子群优化算法(PSO)和遗传算法(GA)的基础上,重点开展了PSO-GA进化优化算法的研究,并将MATLAB与PSO-GA优化算法应用到多连杆悬架的优化过程中。通过对多连杆悬架硬点参数的修改,改善了悬架的性能。通过对两个悬架进行同向轮跳仿真实验的对比分析,发现优化后的多连杆悬架的KC性能得到了明显的改善。最后,对优化后的悬架进行整车操作稳定性的仿真分析。依照国家相关标准,从稳态回转、转向回正、转向轻便性、转向瞬态响应和蛇形等五个方面进行综合评价。依次对优化前与优化后的模型进行上述五个实验仿真,把所得结果进行对比分析,充分证明了优化后的悬架对整车的操作稳定性能也起到了一定的提升。
[Abstract]:The suspension parameters of vehicle handling stability and ride is the important parameters, the good and bad is directly related to the safety of vehicles and traffic officers in the driving process. With increasing demands on the safety performance of vehicles during driving and car prices increase, the industry has grown with the development of control and stability has gained more and more attention. On the other hand, due to the continuous development of computer technology, the scholars in the vehicle development and testing process, has some excellent virtual prototype technology, greatly reduced the cost of R & D and production cycle, this paper is based on the multi body dynamics principle as the foundation, with the help of simulation and optimization analysis of multi link a vehicle suspension virtual prototype technology, and achieved some results. The details are as follows: first, based on consulting a large number of references at home and abroad, describes the automobile suspension and steering In the course of development at home and abroad in the performance, and the theory of multibody system dynamics principle in suspension performance analysis. The related technology research of multi body system dynamics theory and application of ADAMS. Secondly, a multi link suspension vehicle as an example, the modeling of multi link suspension through the CAR and INSIGHT module ADAMS, respectively the suspension hard points coordinates external angle, sensitivity analysis of sensitivity of the toe and tread, to screen the suspension before the beam camber, track effect of hard spot larger, simplify the subsequent optimization steps, shorten the optimization time, improve the efficiency of optimization. Thirdly, analyzed in detail the particle swarm optimization algorithm (PSO) and genetic algorithm (GA) based on the key research on evolutionary optimization algorithm PSO-GA, and the MATLAB and PSO-GA optimization algorithm is applied to optimize the process of multi link suspension. Based on multi link suspension Frame hard point parameters change, improve the suspension performance. Through comparative analysis of the two suspension with wheel simulation, found that the performance of KC multi link suspension after optimization has been greatly improved. Finally, the vehicle operation stability of the optimized suspension simulation analysis. In accordance with the relevant state the standard, from the steady turning, turning, steering, steering for comprehensive evaluation of five aspects of transient response and serpentine. Turn on the optimized model and the five simulation experiments before optimization, the results of the comparative analysis, fully proved that the operation stability of the optimized suspension of the vehicle to play a certain improvement.

【学位授予单位】：长春工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.33

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