基于AR模型的特殊路面的路面谱测量及分析

摘要

提出了一种特殊路面的路面谱的测量方法,在运输车辆车桥上安装加速度传感器,通过测量该处的时域加速度信号来间接计算路面功率谱；运用DASP和MATLAB等软件对测试数据进行处理,并对特殊路面不平度建立AR模型和进行谱估计,得到了多种特殊路面的位移功率谱密度曲线图；结果表明,该实验方法是可行的,同时提出了一种基于AR模型的特殊路面的路面谱测量手段,并验证了用AR模型法对特殊路面进行功率谱分析的可靠性和可行性.%A melhod is introduced to measure the power spectrum of special road, fixing the acceleration sensor in the axis of the wheel in transport vehicle, by measuring the acceleration signal to calculate road power spectral indirectly. By using DASP and MATLAB in data processing. AR model is established and power spectrum is estimated for road roughness and the density of displacement power spectrum curve graph of special road is acquired. It is certified that the method which is introduced to measure the power spectrum of special road based on AR model is feasible and proves the reliability of analyzing the power spectrum by AR model.