34.4 Conclusions To apply the 3D vision system in hypersonic wind tunnel, a two-step self-calibration method was proposed in this paper which uses a non-iterative solution to initial the orthogonal iterative method. The synthetic experimental results shows that our self-calibration method is more accurate and stable than other iterative method. And the 3D vision system with self-calibration method was applied to measure to deformation of an aircraft wing model in hypersonic wind tunnel of CARDC. According to the experiment results, the 3D vision system can get accurate measuring results in hypersonic wind tunnel. Acknowledgements This work was supported by the National Natural Science Foundation of China (No. 51505169), Major Program of Science and Technology Planning Project of Hubei Province (No. 2013AEA003). Fig. 34.7 The coordinates of P4 during the measurement Fig. 34.8 The Spectrogram of P4, P5, P6, P7, P8 and P9 268 R. Chen et al.
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