左右轨道不平顺功率谱转换中心线功率谱的方法

Method of equivalency transform for power spectrum density of track irregularity on central line from on left/right rail

利用关于左、右轨的轨道不平顺与关于轨道中心线的轨道不平顺之关系 ,借助周期图法谱估计和非线性最小二乘法的曲线拟合 ,把左、右轨的轨道不平顺功率谱密度等效转换成关于轨道中心线的功率谱密度。最后结合实例 。

On the basis of the transform relation between railway track irregularity on the central line and railway track irregularity on the left/right rail derived from the power spectrum density in space domain,this paper puts forward a new method of equivalency transform for power spectrum density of railway track irregularity on central line from on left/right rail by means of the spectral estimation of cycle graphs and the algorithm of nonlinear least squares. According to the method, the parameters of the PSD function expression are given with an example.2 tabs,2 figs, 8 refs.