The methods of power spectrum estimation based on measured pavement

Surface elevation data on a certain road are tested and extracted in this paper. The sampling speed and other information are sized at the same time. After pretreated the elevation data by finite impulse response filter, finished the power spectrum estimation by the methods of traditional algorithm and improved algorithm, and obtained power spectrum estimation on measured pavement. The given power spectrum are in accordance with national standards to verify the rationality. It is found that in the given error condition, power spectrum estimation are accurate on measured road roughness by using appropriate windowed average periodogram method. This will be the basis for three-dimensional reconstruction of the virtual road and vehicle simulation test.