摘要
为使变翼型便携式小型无人机拥有低起飞速度和较高的巡航速度,快速到达目的地的同时能有效改善无人机以不同方式起飞的性能,采用B样条方法描述翼型形状,用XFOIL软件进行气动计算,用遗传算法进行迭代计算,对无人机的翼型形状进行优化设计,得到了一个可以由巡航阶段翼型简单变化而来的改善飞机起飞性能的翼型形状。采用CFD仿真软件对翼型升阻力特性进行分析,并获得了采用变体技术的飞机在巡航阶段翼型和起飞阶段翼型的气动参数。最后通过对变体无人机和非变体无人机以不同方式起飞的起飞轨迹的仿真计算、比较证明了采用变翼型技术的无人机在采用不同方式起飞时都能有效改善起飞性能。
By using morphing airfoil technology, a portable small unmanned aero vehicle （UAV） can have low taking up speed and faster cruising speed. Then the small UAV can take off by hand throw or launch by a launching cradle with a shot guide rail, and get the target region rapidly. In the paper, B Spline was used to represent the air- foil, the XFOIL was used to calculate the polar character of the airfoil, genetic algorithm method was used to optimize the parameter, and all of them were put together by the optimal software Isight. An airfoil was obtained from the cruise airfoil by the optimization which can reduce the taking off speed of the UAV. CFD simulation software was used to analyse the aerodynamic character of the morphing wing and fixed wing. The flight paths of the morphing and fixed wing planes were compared with different taking off methods; it is proved that the morphing airfoil technology can change the taking off character efficiently.
出处
《计算机仿真》
CSCD
北大核心
2013年第3期88-91,共4页
Computer Simulation
关键词
变翼型技术
便携式无人机
起飞速度
巡航速度
翼型优化设计
Morphing airfoil
Portable unmanned aero vehicle
Take off speed
Cruise speed
Airfoil optimization
