| 低速长航时无人机垂直突风过载分析 |
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| 引用本文： | 李建华,刘凯,李平坤,李锋.低速长航时无人机垂直突风过载分析[J].航空工程进展,2017,8(3):304-307. |
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| 作者姓名： | 李建华 刘凯 李平坤 李锋 |
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| 作者单位： | 中国航天空气动力技术研究院彩虹无人机科技有限公司,北京,100074 |
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| 摘 要： | 低速中空长航时无人机的升力非线性较强,利用标准离散突风模型和连续紊流模型计算得到的突风过载差别较大.针对该问题,本文采用改进的离散突风模型求解突风载荷,即直接求解突风条件下原始的运动学方程,并在运动历程中考虑非线性升力的影响.结果表明:改进的离散突风模型计算得到的突风载荷明显低于标准离散突风模型所得的载荷,更贴近无人机的实际情况,且改进的离散突风模型与连续紊流模型的计算结果也相近.
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| 关 键 词： | 中空长航时 无人机 突风载荷 离散突风 连续湍流 |
| 收稿时间： | 2017/1/11 0:00:00 |
| 修稿时间： | 2017/3/7 0:00:00 |
Computation of Longitudinal Gust Load for a Low Speed Long Endurance UAV |
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| LI Jian-hu,LIU Kai,LI Ping-kun and LI Feng.Computation of Longitudinal Gust Load for a Low Speed Long Endurance UAV[J].Advances in Aeronautical Science and Engineering,2017,8(3):304-307. |
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| Authors: | LI Jian-hu LIU Kai LI Ping-kun and LI Feng |
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| Affiliation: | China Academy of Aerospace Aerodynamics,China Academy of Aerospace Aerodynamics,China Academy of Aerospace Aerodynamics,China Academy of Aerospace Aerodynamics |
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| Abstract: | There is a significant gust loads difference between the normal discrete gust model and continuous turbulence model because of the strong lift nonlinearity of a low speed medium altitude long endurance(MALE) UAV. To solve this problem, an improved discrete gust model is adopted, namely, the kinematic equation of gust load is solved and the nonlinear lift is also considered during the moving course. Result indicates that the gust load obtained by the improved method is smaller than that by normal discrete gust model, and which is close to the actual gust load. At the same time, the gust load is accordance with that computed by continuous turbulence model. |
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| Keywords: | medium altitude long endurance(MALE) UAV gust load discrete gust continuous turbulence |
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