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车辆与轨道之间的相互作用关系可以通过传递函数来描述,在研究中,通常采用的方法是,根据质量-弹簧-阻尼简图建立数学模型。然而,由于实际上不可能精确地确定这些参数值,因而用这种数学模型来预测估计,其作用一般不大。本文所介绍的方法是以随机信号分析的理论为基础的。首先测量出轨道几何线形信号(输入)和相应的车辆响应信号(输出),然后,利用MISO方法(多输入、单输出方法)建立起车辆与轨道几何线形之间的传递函数。此外,本文又提出了借助于测力轮对和MISO方法,有可能对Q、Y力进行实际动态测量。
The interaction between the vehicle and the orbit can be described by the transfer function. In the research, the commonly used method is to build the mathematical model according to the mass-spring-damping diagram. However, since it is practically impossible to accurately determine these parameter values, the use of such mathematical models to predict estimates is not generally effective. The method described in this article is based on the theory of stochastic signal analysis. First of all, the geometrical linear signal (input) and the corresponding vehicle response signal (output) are measured. Then, the transfer function between the geometrical shape of the vehicle and the orbit is established by MISO method (multiple input and single output). In addition, this paper also proposed the use of wheelsets and MISO method, it is possible to Q, Y force actual dynamic measurement.