飞翼无人机着陆过程中的抗侧风控制研究

飞翼布局无人机的无尾布局给横侧向的稳定与控制带来困难,尤其是下降阶段有侧风时的航迹控制.带侧滑保持航向和带偏流保持航向是常用的两种抗侧风策略,为解决稳定性控制,研究了两种策略的优缺点,并针对两种控制策略分别设计了横航向抗侧风控制器.结合飞翼布局无人机的特点,在着陆过程中的不同阶段选择不同的抗侧风策略,在进场和下滑初始阶段采用带偏流保持航向方式,在下滑到一定高度时转为带侧滑保持航向的控制策略.仿真结果表明,选择的控制策略以及设计的控制器合理、可行,满足飞翼无人机着陆阶段的抗侧风要求.

Research on Counteracting Side Wind in Landing Control for Fly- Wing UAV

Tailless flying wing UAV brings difficulties to its lateral stability and control, especially for its flight path control with side wind. There are two strategies widely used to counteract side wind, one is keeping the course with a fixed sideslip angle, the other is keeping the course with a drift angle. Advantage and disadvantage of each strategy are commented, and different lateral controllers are designed for each strategy. According to the characteris-tics of flying wing UAV, different strategies are used in various phases. Keeping the course with a drift angle is used in approach and early glide phase, while keeping the course with a fixed sideslip angle is used in later glide and land-ing phase. Simulation results show that the strategy and controller is good at counteracting side wind.