汽车轮心实际行驶位移提取方法

为解决实车试验中轮心位移量获取困难的问题,提出了一种汽车轮心实际行驶位移的提取方法。针对某款量产车型设计了轮心实际行驶数据的采集试验,利用最小二乘法原理使用直线滑动平均法对离散数据进行线性平滑预处理。在此基础上,提出基于带通滤波的频域积分法对轮心加速度数据进行积分变换求位移,并分析了工程中对加速度信号进行积分变换时误差产生的原因,找出解决办法,从而获取汽车轮心的实际行驶位移。最后,将提取到的轮心位移与试验采集所得轮心位移数据进行对比验证,误差在2%以内,效果良好,本文提出方法具有可行性。

Method to Extract Actual Displacement of a Car Wheel Center

To solve the problem of getting displacement signals in a real car, this essay brings up a method to get the transformation signal by using actual acceleration signals. We Designed a collection test for a Production Car wheel center actual driving data, using least squares principle with the line moving average method to smooth preprocessing discrete linear data. Following the basis above, the method is based on band-pass filter frequency-domain integral method to get the transformation displacement by using wheel center acceleration data. We analyzed the transformation error of integrating acceleration signals in engineering and find a solution. At last, we used the wheel transformation data measured in the testing field compared with the integration result to make a validation. The result is good, implying the method is feasible.