摘要
为了研究动态滑翔的物理本质,从受力平衡的角度出发,根据物理定律推导平衡方程,从数学上求解出方程解集构成的平衡曲线。以信天翁和某小型无人机在不同风梯度下滑翔为例对平衡曲线进行仿真。分析和仿真结果表明:平衡曲线是满足受力平衡的所有速度状态的集合,由上升和下降两个分支构成;上升分支只有当风梯度足够大时才存在,是动态滑翔的关键。
To clarify the physical essential,a perspective of force balance to dynamic soaring was put forward. Equilibrium equations were derived according to physical laws. The solution of the equations solved mathematically formed a curve. Simulations of the curve were made in the cases of an albatross and an unmanned air vehicle in different wind gradients for instances. The results of analysis and simulation indicate that the curve is the velocity set that satisfies the equilibrium equations; the curve consists of a climbing branch and a diving one; the climbing branch exists only if the gradient is sufficiently large,and it is critical to dynamic soaring.
作者
单上求
侯中喜
王鹏
郭正
SHAN Shangqiu HOU Zhongxi WANG Peng GUO Zheng(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2017年第4期15-20,共6页
Journal of National University of Defense Technology
基金
国家863计划资助项目(2014AA7054035)
关键词
动态滑翔
无动力飞行
风梯度
受力平衡
无人机
dynamic soaring
effortless flight
wind gradient
force balance
unmanned air vehicle
