大口径碳纤维复合材料天线反射器模具在位测量技术

In-situ Measurement Technology for Large Diameter Carbon Fiber Reinforced Composite Reflector Mold

针对碳纤维复合材料模具修形过程中的型面精度测量,研究一种基于机器人和激光跟踪三维测量系统的在位测量技术。通过测量轨迹规划、坐标系变换,关联在位测量系统中的各个单元,实现两个系统的运动-跟随-采样的连续动作,完成模具型面点云的自动高效采样。在此基础上,研究抛物面型面精度评价算法,实现实测点云和理论模型的最佳拟合,从而获得模具型面精度。结果表明:利用在位测量技术,测量效率大幅提高,型面精度的数值和图形结果能够辅助模具的高效修形。

Aiming at precision measurement in the manufacture process of carbon fiber reinforced composite reflector mold,an in-situ measurement technology based on robot and laser tracking three-dimensional measurement system was studied. Each unit in the in-situ measurement system was correlated by measuring trajectory planning and coordinate frame transformation,the continuous motion of the two systems could be followed to complete the automatic and efficient sampling of point clouds on the mold surface. On this basis,the parabolic surface accuracy evaluation algorithm is studied,and the best fitting between the measurement points and the theoretical model was realized,thus the values of the mold surface accuracy were obtained. The results show that the measurement efficiency is greatly improved by using the in-situ measurement technology,and the numerical and graphic results of the surface accuracy can assist the efficient modification of the mold.