Track geometry parameters measured by a track recording car at a turnout are often hard to interpret due to the concomitant geometric complexity, especially for a high-speed railway turnout whose running edge is not interrupted. The virtual track inspection (VTI) method integrated with a multibody system model is proposed to reveal the longitudinal level and alignment of high-speed railway turnouts when the train passes in the main line and in the branch line. Firstly, the principle of inertial measurement and its implementation in MBS are introduced. Then, the VTI method is applied to the vehicle-turnout dynamics using a single-layered co-running track model and validated on tangent and curved tracks in the spatial and wavelength domain. Zero-phase Filters for wavelength ranges 3–25 m and 1–5 m are necessary to eliminate interference from long waves, and to better identify the switch and crossing, respectively. Finally, the effect of different track foundations is studied, including the two-layered co-running track model and the finite element model on the VTI method.

由于伴随的几何复杂性，由轨道记录车在道岔处测量的轨道几何参数通常难以解释，特别是对于运行边缘没有中断的高速铁路道岔。提出了结合多体系统模型的虚拟轨道检测（VTI）方法，以揭示高速铁路道岔在主线和支线通过时的纵向水平和线形。首先介绍了惯性测量原理及其在MBS中的实现。然后，将 VTI 方法应用到使用单层共运行轨道模型的车辆道岔动力学中，并在空间和波长域的切线和曲线轨道上进行验证。波长范围为 3–25 m 和 1–5 m 的零相位滤光片对于消除长波的干扰以及更好地分别识别开关和交叉点是必要的。最后，研究了不同轨道基础的影响，包括两层共跑轨道模型和有限元模型对VTI方法的影响。