关键词: 高升阻比飞行器, 协同制导, 滑模控制, 参数优化, 稳定性

Abstract:

Aiming at the problem of time coordination of multiple high-lift-to-drag ratio aircrafts in mid-flight, a cooperative guidance method of high-lift-to-drag ratio aircraft based on sliding mode control is proposed. A cooperative flight mechanics model of multiple lift-to-drag ratio aircrafts is established, and the flight program of the aircraft in mid-flight guidance and the sliding mode control strategy for lateral maneuvering of the aircraft are designed and planned. By designing nominal trajectories, the control parameters are optimized to generate the lateral overload required by different initial conditions of each aircraft and obtain the required tilt angle command through the lateral overload, so as to control the flight time of the aircraft, so that multiple aircrafts can reach the set range above the target point at the same time, and consider the starting and ending conditions and state constraints of the aircraft, enabling the aircraft to meet collaborative mission requirements. Lyapunov stability criterion is used to prove the stability of the system and the non-singularity of the sliding mode surface. Simulation results show that the cooperative guidance strategy has a certain anti-interference property, and can meet the requirements of the cooperative guidance of multiple aircrafts launched asynchronously.

Key words: high lift-to-drag ratio aircraft, cooperative guidance, sliding mode control, parameter optimization, stability