| 引用本文: | 单上求,侯中喜,朱炳杰,等.动态滑翔动力学建模与风梯度能量获取.[J].国防科技大学学报,2015,37(4):45-49.[点击复制] |
| SHAN Shangqiu,HOU Zhongxi,ZHU Bingjie,et al.Dynamics modeling of dynamic soaring and energy gaining from the wind gradient[J].Journal of National University of Defense Technology,2015,37(4):45-49[点击复制] |
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| 动态滑翔动力学建模与风梯度能量获取 |
| 单上求, 侯中喜, 朱炳杰, 高显忠 |
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(国防科技大学 航天科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 为简化问题描述和便于数学操作，对无动力飞机的动态滑翔问题做了假设，并在这些假设下建立了无动力飞机动态滑翔的动力学模型，即三维速度空间中只有一个输入变量的常微分方程组。之后，从理论上得到了这个三维速度空间中机械能可以增加的最大范围，即能增纺锤体内部，并推导出最大的机械能增加率。得出更大的风梯度、更小的阻力系数和更小的面质比更加有利于飞机获取能量的结论，该结论加深了对动态滑翔能量观点的认识，对实践有指导意义。 |
| 关键词: 动态滑翔 风梯度能量获取 无动力滑翔 |
| DOI：10.11887/j.cn.201504008 |
| 投稿日期：2014-04-10 |
| 基金项目:国家863计划资助项目（2014AA7054035） |
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| Dynamics modeling of dynamic soaring and energy gaining from the wind gradient |
| SHAN Shangqiu, HOU Zhongxi, ZHU Bingjie, GAO Xianzhong |
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(College of Aerospace Sciences and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In order to simplify the description of the problems and to be convenient for mathematical manipulation, a series of hypotheses about the dynamic glide problem of unpowered aircraft were made. Under these hypotheses, a dynamics model of dynamic soaring, which is a 3-dimentional ordinary differential equations in the velocity space with a single input, was built. The largest growing area of mechanical energy in this velocity space, which is called energy-gained spindle, was obtained theoretically and the maximum rate of energy increasing was also deduced. The conclusion that the larger wind gradient, the smaller drag and the smaller area-mass ratio are more in favor of gaining energy for the engines aircraft gives a deeper understanding of the dynamic soaring energy and it can help the practice. |
| Keywords: dynamic soaring wind gradient energy gaining unpowered soaring |
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