A new uncertain analysis method and its application in vehicle dynamics

A new uncertain analysis method and its application in vehicle dynamics
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一种新的不确定性分析方法及其在车辆动力学中的应用

DOI:
10.1016/j.ymssp.2014.05.036
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发表时间:
2015
影响因子:
8.4
通讯作者:
Zhang, Yunqing
Zhang, Yunqing
中科院分区:
工程技术1区
文献类型:
--
作者:
Wu, Jinglai;Luo, Zhen;Zhang, Nong;Zhang, Yunqing

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提出了一种新的车辆动力学不确定性分析方法。将描述随机不确定性的多项式混沌(PC)理论与描述区间不确定性的切比雪夫包含函数理论相结合,提出了多项式混沌切比雪夫区间(PCCI)方法。PCCI方法是非侵入性的,因为它不需要修改原始求解器的不同和复杂的动力学问题。建立了两类评价指标:一类是区间均值(IM)和区间方差(IV),另一类是下界均值(MLB)、下界方差(VLB)、上界均值(MUB)和上界方差(VUB)。将蒙特卡罗方法与扫描方法相结合,得到参考结果,并以四自由度车辆侧倾规划模型为例,验证了所提方法的有效性。
This paper proposes a new uncertain analysis method for vehicle dynamics involving hybrid uncertainty parameters. The Polynomial Chaos (PC) theory that accounts for the random uncertainty is systematically integrated with the Chebyshev inclusion function theory that describes the interval uncertainty, to deliver a Polynomial-Chaos-Chebyshev-Interval (PCCI) method. The PCCI method is non-intrusive, because it does not require the amendment of the original solver for different and complicated dynamics problems. Two types of evaluation indexes are established: the first includes interval mean (IM) and interval variance (IV), and the second are the mean of lower bound (MLB), the variance of lower bound (VLB), the mean of upper bound (MUB) and the variance of upper bound (VUB). The Monte Carlo method is combined with the scanning method to produce the reference results, and then a 4-DOF vehicle roll plan model is employed to demonstrate the effectiveness of the proposed method for vehicle dynamics.
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