基于DWT的路面不平度模拟的研究

A Study on the Road Roughness Simulation Based on DWT

为了更好地模拟实测路面不平度,提出了基于DWT的FD过程路面不平度模型。与传统的AR模型相比,该模型模拟的等级路面不平度精度高且时间开销小。利用离散小波变换对FD过程去相关,并采用平稳或非平稳FD过程最大可能性估计,对实测路面不平度进行了模拟,结果表明:所模拟的路面不平度与实测路面不平度比较相近。

In order to improve the simulation of actually measured road roughness,the road roughness model of FD process based on DWT is proposed.Compared with the traditional AR model,the road roughness of grade road could be simulated with high precision and small computing time.Employing DWT to decorrelate the FD process,the maximal likelihood estimators of the road roughness of stationary/nonstationary FD process is adopted to simulate the actually measured road roughness.The experimental results show that the road roughness data simulated are closer to the actually measured road roughness.