Airfoil three-dimensional deformation real-time dynamic measurement method in rocket sled test

The invention discloses a real-time dynamic measurement method for three-dimensional deformation of an airfoil in a rocket sled test. The method comprises the following steps: (1) strain array acquisition: selecting a plurality of strain measurement points on the airfoil and measuring the strain of each strain measurement point; (2) calculating the local curvature of the airfoil at each strain measurement point; (3) calculating all curvature information between every two adjacent strain measurement points on the same deformation curve to form an arc section; (4) connecting the arc sections on the same deformation curve to form a complete deformation curve; and (5) constructing a deformation curved surface according to all the deformation curves on the airfoil. According to the method, the data distortion phenomenon which cannot be avoided by a measurement means is overcome, the idea of regression analysis is applied to data measurement, meanwhile, selection of training samples is optimized, and the environmen