汽车道路行驶试验载荷谱样本长度确定方法的研究

为解决在样本长度确定中总体参数不易求得的问题，结合汽车道路行驶试验中采集的载荷谱随机数据，就如何确定样本长度进行了探讨，通过比较分析提出了新的设想和方法。该方法通过观察样本统计值随样本容量增大的变化规律，用回归分析的方法找到反映这种趋势的方程，并以该方程的极限作为总体参数，利用计算得到的总体参数和回归分析得到的方程之间的相对误差来控制样本的长度。最后对该方法进行了实际应用验证。

Study on the Method of Load Spectrum Sample Size Determination in Vehicle Road Testing

In order to solve the problem that the overall parameter during determining the sample size are difficult to get,combined with the load spectrum random data collected in vehicle road tests,it is discussed how to determine the sample size,and the new concept and method are presented by comparative analysis.The method is to create the equation reflecting the trend of statistical value varying with sample size using the regression analysis method and to take the equa-tion limit as the overall parameter, and to control sample size with the relative error between the calculated overall para-meter and the equation created with the regression analysis method.In the end,practical validations are applied to the method.