带变形涡轮叶片精确配准算法研究

Research on the Precision Registration Algorithm for Turbine Blade with Deformation

摘要: 为满足航空发动机精铸涡轮叶片壁厚偏差分析需要,提出了一种基于变形函数的精铸涡轮叶片检测模型非刚体配准算法。首先,进行测量数据与CAD数据全局配准并对测量数据整体空间变换;然后,通过对变换后的测量数据与CAD模型的切片化处理及切片数据配准运算,分析叶片弯扭变形规律,实现测量数据的变形校正,达到测量数据与CAD模型的无变形配准,从而提高配准精度,为后续分析提供高精度数据。

Abstract: To satisfy the need of blade geometry inspection and deviation analysis of aero-engine,a non-rigid registration algorithm based on deformation function is proposed.Firstly,measure data was translated based on the global registration results of measure data and CAD model.Second,through slicing the global translated measure data and CAD model and aligning the slicing data to analyze the blade blend and twist deformation law,and achieve the goal of torsion deformation correcting and increase the precision of registration.