扫频试验中传感器位置对整车平顺性评价影响研究

Study on the Influence of the Position of Sensor on Vehicle Ride Comfort Evaluation in Sweep Test

摘要: 整车扫频试验可以测量车辆轴头到车身的传递函数，通过分析不同频域段的传递特性来评价整车平顺性能。在试验过程中，传感器的布置位置对最终传递函数的结果显得尤为重要，本文通过试验，对比分析了常规试验过程中不同布置位置的信号差异，从而得知传感器位置是否会对平顺性结果有影响。具体地，首先，通过软件生成等速扫频激励信号，并在四立柱台架迭代得到响应的驱动信号；其次，在车辆轴头不同位置和车身布置加速度传感器；最后，播放驱动信号，并采集不同位置的响应信号。经过对比分析，验证了轴头传感器的位置会对传递函数造成一定影响。

Abstract: The vehicle frequency scanning test can measure the transfer function from the vehicle axle to the body, and evaluate the vehicle ride performance by analyzing the transfer characteristic in different frequency domains. In the test process, the arrangement position of the sensor is particularly im-portant to the result of the final transfer function. This paper compared and analyzed the signal dif-ference of different arrangement positions in the conventional test process through experiments, so as to know whether the sensor position will affect the ride comfort results. Specifically, first, the constant velocity sweep excitation signal is generated by the software, and the corresponding driv-ing signal is obtained on the four-poster bench; secondly, the acceleration sensors are arranged at different positions of the vehicle axle head and the body; finally, the driving signal is played and collected the response signal at different locations. After comparative analysis, it is verified that the position of the shaft head sensor will have a certain influence on the transfer function.