Volume 39, Number 4, August 2021
|Page(s)||703 - 711|
|Published online||23 September 2021|
Exploration of high-altitude dynamic soaring based on six-degree-of-freedom model
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
Dynamic soaring is an emerging flight range-extension technology that effectively reduces UAV's energy consumption by deriving wind energy from lateral gradient wind fields. Comparing with the small UAV's near the surface, the application of dynamic soaring technology in the high-altitude long-endurance flight requires the additional consideration of the influence of sustained side wind, the influence of the sideslip angle cannot be ignored. This puts higher requirements on the flight dynamics model. In this paper, the dynamic model for the high-altitude dynamic soaring based on the six-degree-of-freedom equation is modeled to replace the traditional mass point model; the energy change principle of the high-altitude dynamic gliding is derived; the effect of the high-altitude wind field on the dynamic soaring UAV is analyzed; and the way to get optimal wind field energy acquisition and energy saving efficiency are analyzed. The results show that the dynamics model based on the six-degree-of-freedom equation can more realistically reflect at high altitude; the application of dynamic soaring can effectively improve the range of the high-altitude UAV; the wind direction at high-altitude wind field has a significant effect on the dynamic soaring efficiency.
Key words: dynamic soaring / UAV / trajectory optimization / sideslip angle / high altitude flight
关键字 : 动态滑翔 / 无人机 / 航迹优化 / 侧滑角 / 高空飞行
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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