A fixed-wing aircraft called Mars Airplane Balloon Experiment −2 (MABE2) developed by the authors was the subject of high-altitude flight demonstration test in this paper, which can simulate the near-actual environment of a Martian atmospheric flight. Although the flight condition is in the low-Reynolds-number region due to low density at high altitude, the wing suffers from aeroelastic deformation given the relatively high dynamic pressure load in the pull-up phase. Stereophotogrammetry was applied in the 6.5 mנ5.5 m low-speed wind tunnel at the Japan Aerospace Exploration Agency (JAXA), aiming to optically measure MABE2’s aeroelastic deformation under dynamic pressure loads equivalent to high-altitude flight test, with the MABE2’s reinforced structural strength. The results of the accuracy test indicated that stereophotogrammetry measures aeroelastic deformation at high accuracy of 0.1 mm around the image center and 0.3 mm around the edge. A slight deflection of up to 4 mm was observed on the main wing, whereas both the main and tail wings were hardly twisted. Compared with flight-simulation-assumed errors, these deformations are extremely small and have a negligible effect on the high-altitude flight test. The study results confirmed the practicality and efficiency of this optical measurement technique in aeroelastic deformation measurement for a real light aircraft.

作者开发的一种固定翼飞机称为“火星飞机气球实验-2（MABE2）”是本文的高空飞行演示测试的主题，它可以模拟火星大气飞行的近乎实际环境。尽管由于高海拔地区的低密度飞行条件处于低雷诺数区域，但鉴于在上拉阶段动压负荷较高，机翼会遭受气弹性变形。立体摄影测量法在日本航空航天局（JAXA）的6.5 m×5.5 m低速风洞中进行了应用，旨在通过光学测量MABE2在相当于高空飞行试验的动态压力载荷下的气动弹性变形，并增强了MABE2的结构强度。准确性测试的结果表明，立体摄影测量仪可以在图像中心周围0.1毫米和边缘周围0.3毫米的高精度下测量气动弹性变形。在主翼上观察到了高达4 mm的轻微偏转，而主翼和尾翼几乎都没有扭曲。与假定的飞行模拟误差相比，这些变形非常小，对高空飞行试验的影响可忽略不计。研究结果证实了这种光学测量技术在实际飞机的气动弹性变形测量中的实用性和效率。与假定的飞行模拟误差相比，这些变形非常小，对高空飞行试验的影响可忽略不计。研究结果证实了这种光学测量技术在实际飞机的气动弹性变形测量中的实用性和效率。与假定的飞行模拟误差相比，这些变形非常小，对高空飞行试验的影响可忽略不计。研究结果证实了这种光学测量技术在实际飞机的气动弹性变形测量中的实用性和效率。