Nonlinearity-induced time-varying harmonic dynamic axle load and its impact on dynamic stability of car-trailer combinations
Nonlinearity-induced time-varying harmonic dynamic axle load and its impact on dynamic stability of car-trailer combinations
复制标题
非线性引起的时变谐波动轴荷及其对车挂车组合动态稳定性的影响
DOI：
10.1080/00423114.2016.1175647
复制
发表时间：
2016
影响因子：
3.6
通讯作者：
Winner Hermann
中科院分区：
文献类型：
--
作者：
Zhang Ning;Xiao Hong;Winner Hermann
在某车-挂车组合的道路试验中，发现了一种非线性诱导的时变简谐动态轴载。为了了解其对系统动态稳定性的影响，提出了相应的线性单轨模型(STM)。描述了系统的动态稳定性，并对系统参数进行了灵敏度分析。简谐力的贡献由导出的有效轴载来量化。针对实际中的谐波效应可能是时变的，提出了一种基于时频分析的参数识别方法。实验研究表明，系统确实存在时变谐波效应。设计了一种基于横摆率的仿真方法来模拟这一行为。通过仿真研究，对谐波幅值或相位对系统动态稳定性的影响进行了灵敏度分析。在选定的时间窗内对谐波幅值和相移进行适当的修正，可以很好地模拟道路试验中的时变系统特性。
A nonlinearity-induced time-varying harmonic dynamic axle load is found in the road test of a car–trailer combination. To understand its influence on system dynamic stability, a corresponding linear single-track model (STM) is proposed. System dynamic stability is described and sensitivity analysis for the system parameters is achieved. The contribution of the harmonic force is quantified by a derived effective axle load. Because the harmonic effect might be time varying in practice, a time–frequency analysis-based parameter identification method is introduced. Experimental study shows that a time-varying harmonic effect really exists. A yaw-rate-based simulation method is designed to simulate this behaviour. The sensitivity analysis of the influence of the harmonic amplitude or phase on dynamic stability is performed with a simulation study. With appropriate modification of the harmonic amplitude and phase shift applied in selected time windows, the time-varying system characteristics in the road test can be simulated very well.