Study of simulation of road roughness based on inverse transform

When road roughness is simulated using the existing methods, the error between the simulation result and the true road roughness occurs, and sometimes the error is obvious. Aimed at this problem, a new method for simulating road roughness is introduced based on inverse transform in this paper. Road roughness is obtained by studying directly the given power spectral density, truncating and increasing data correctly and transforming the data according to FOURIER transform theory and sampling theorem. Considering the effect of the vehicle natural vibration frequency and velocity, the simulation and analysis are done on A, E-the two grades of road using this method. The results indicate that the power spectral density of the road roughness obtained is the same as the given, and this method is simple, practical and easy to use.