变构型陆空平台动态起降轨迹规划研究

陆空平台具有多域机动能力，通过陆空模式的转换能够适应各种复杂环境，但陆空模式转换多为静止起飞或悬停下降，这种静态起降方式不利于陆空平台机动性的充分发挥. 针对一种动力机构可偏转的变构型陆空两栖平台，基于牛顿-欧拉方程建立陆空平台的飞行动力学模型，规划偏转角的时间序列以获得动态动力学约束，确定相对时间最优目标函数；基于5次多项式拟合二维平面轨迹，根据PID控制方法设计轨迹跟踪控制器，并进行轨迹规划和控制仿真. 结果表明，动态切换时间相比静态切换时间缩短了23.02%，动态切换规划轨迹平滑，高度方向无超调，控制器能较好地跟踪目标飞行轨迹. 

Trajectory Planning of Dynamic Take-off and Landing of Deformable Aerial-Ground Platform

Aerial-ground platform has multi-domain maneuverability and can adapt to various complex environments through the conversion of land and air mode, but the land and air mode conversion is mostly static take-off or hovering descent, which is not conducive to the full display of the maneuverability of the aerial-ground platform. Aiming at a deformable aerial-ground amphibious platform with deflectable power mechanism, the flight dynamics model of the aerial-ground platform was established based on the Newton-Euler equation, the time sequence of the deflection angle was planned to obtain dynamic constraints, and the relative time optimal objective function was determined. The fifth-order polynomial was used to fit the two-dimensional trajectory, and the trajectory tracking controller was designed according to the PID control method, and the trajectory planning and control simulation were carried out. The results show that the dynamic switching time is shortened by 23.02% compared with the static switching time, the dynamic switching planning trajectory is smooth, there is no overshoot in the altitude direction, and the controller can better track the target flight trajectory.