基于Kriging模型插值的孔位修正策略

飞机装配时的孔位精度直接影响其最终装配质量，而待制孔零件易发生变形和整体偏移，因此一般通过基准孔信息对待制孔位进行补偿。提出一种基于Kriging插值的孔位修正方法，通过基准孔建立孔位理论坐标与实际偏差值的Kriging模型，进而预测待制孔的孔位偏差，并给出每个位置的预测标准误差，以指导基准孔的增添和布置。最后通过有限元和数值实验分别验证了零件在极限变形和整体平移旋转情况下该方法的有效性，实现了孔位估计误差小于0.3 mm。

Correction strategy for hole positions based on Kriging interpolation

Hole position accuracy in aircraft assembly directly affects the final assembly quality, while parts to be holed are prone to deformation and overall offset. Therefore, the hole position is generally compensated by reference hole information. In this paper, a method of hole position correction based on the Kriging interpolation is proposed. The Kriging model of theoretical coordinates and the actual deviation of hole position are established through reference hole, and then the deviation of hole to be made is predicted. The prediction root mean square error of each position is given to guide the addition and layout of the reference hole. Finally, the effectiveness of the method under the condition of ultimate deformation or overall translation and rotation is verified by the finite element method and numerical experiments. The hole position estimation error is less than 0.3 mm.