飞机结构件动态变形测量技术研究

Research on Aircraft Structure Dynamic Deformation Measuring Technology

摘要:

针对飞行试验中飞机结构件的动态变形测量问题,提出了一种基于图像的测量方法,对其中涉及的关键技术进行了研究；采用10参数模型非线性成像模型补偿摄像机系统误差,引入摄像机动态校准算法,使摄像机标校重投影误差小于0.03 pixel；采用编码标志作为测量标志,提高了图像自动识别和匹配效率；采用双像机交会测量计算测量标志位移变形量可达到0.15 mm/m；实验证明,该方法满足飞行试验中飞机结构件动态变形要求。

Abstract:

In order to solve the problem of dynamic deformation measurement for aircraft structural parts in flight test,a method based on image is presented,and the key technologies involved are studied. 10-parameter model and the dynamic camera calibration algorithm are adopted to compensate the camera system error. After that the camera calibration re-projection error is less than 0.03 pixel.Using Coded marks as the surveying marks,the efficiency of image automatic recognition and matching are improved. The measurement accuracy of key points deformation is 0.05 mm/m using intersection measurement. The experiment results show that the proposed method in this paper can satisfy the demands for aircraft structural parts dynamic deformation measuring in flight test.