基于小波分析的白车身阶跃测量数据处理

BIW CMM Leap Data Process Based on Wavelet Analysis

白车身焊装质量评价过程中,三坐标测量机(CMM)测量数据为非平稳随机过程。如何对白车身焊装质量做出准确评价是对其制造质量进行控制的基础。本文采用小波分析方法对白车身焊装过程中具有阶跃特征的CMM测量数据进行处理,使用处理后的数据对白车身焊装质量进行评价,并对数据处理过程中的问题进行了研究。通过对一个实际案例的应用分析,验证了小波分析方法对白车身阶跃测量数据处理的有效性。

It is an important problem how to evaluate the process properly in the process of bodyinwhite (BIW) assembly quality control. The process of BIW assembly is a nonstationary time series. Wavelet analysis is employed to separate the trend part and variation part in Coordinate Measuring Machine (CMM) data. A practical case analyzed by wavelet analysis has proved the effectiveness of using variation part of the CMM data to evaluate the BIW assembly quality.