摘要
针对航空发动机涡轮叶片几何形状检测中的模型配准定位问题,依据叶片型面区域公差设计的特点,提出一种区域公差约束的叶片模型配准方法,尽可能把模型配准控制点集约束在公差带以内。在迭代最近点配准方法的目标函数的基础上,附加区域公差约束条件,建立区域公差约束的叶片模型配准目标函数,并给出了基于遗传算法叶片模型约束配准求解方法。使用叶片的仿真与实测数据进行了模型配准实验,结果表明,所提出的方法能显著减少配准控制点集的超差点数目。
To align the measurement data of the investment casting turbine blade and its Computer Aided Design（CAD）model to unify the coordinate system for its geometric shape inspection,a tolerance zone constrained model alignment method was presented.The objective function of the constrained model alignment method was established by combining the tolerance zone constrained conditions and the objective function of the basic iterative closest point algorithm.Methods based on genetic algorithm were adopted to solve the constrained alignment objective function.Simulation data and real measurement data of the turbine blade were used to perform model alignment testing.The results showed that the number of the model alignment control point outside the predefined tolerance zone could be reduced obviously.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2010年第4期883-886,共4页
Computer Integrated Manufacturing Systems
关键词
涡轮叶片
模型配准
区域公差
遗传算法
计算机辅助设计
turbine blade
model alignment
tolerance zone
genetic algorithm
computer aided design
