基于台架试验的悬架减振器异响辨识研究

针对某车型悬架减振器异响问题,分别进行整车道路及台架试验,获得两者的一致性规律,即减振器活塞杆加速度信号在特定频段内具有相似性。进而对减振器异响台架试验的辨识方法进行研究,提出时域峰谷差值法、分段功率谱RMS值法及基于特征能量小波分析法,并分析比较其优缺点。在此基础上提出并采用基于权重系数的聚类分析法,将单指标刚性矩形判定区域转化为多指标柔性圆形判定区域,减少评判结果因单指标误判导致最终结果误判的概率,可为大批量、不同型号减振器异响辨识及提高鉴别准确度提供参考。

Rig test for identifying abnormal noise of suspension shock absorber

For a vehicle suspension shock absorber abnormal noise problem, the vehicle road test and rig test has been carried on, which result in the consistency rule: shock absorber piston rod acceleration signal within the specific frequency band has similarity. So the part of road test can be replaced by a series of rig tests for shock absorber abnormal noise identification. Then research on the rig test for identifying abnormal noise of shock absorber puts forward The Time Difference Method, The Subsection Auto-power RMS Value Method and The Characteristic Energy of Wavelet Analysis Method and compare their advantages and disadvantages. Depends on that, the Clustering Analysis Method Based On Weight Coefficient has been proposed and adopted, which transfer rigid rectangular single index into a more flexible circular determine areas and reduce the final misjudgment probability caused by single index. This method can provide the reference for the mass, different types of absorber abnormal noise identification and improve the judgment accuracy.