倾转旋翼无人机过渡段纵向控制策略设计研究

针对倾转旋翼无人机过渡段纵向控制问题,基于工程化应用要求,以某型倾转旋翼无人机为研究对象,首先综述了国内倾转旋翼机的研究进展与发展趋势.其次分析了过渡段气动特性变化,根据过渡阶段的升力来源,将整个过渡过程划分为变距操纵段与气动操纵段,并根据各个阶段的前飞速度与短舱角的关系,确定倾转过渡方案.然后以操纵舵面分配方案为基础,设计了过渡过程各阶段纵向控制策略,并通过仿真验证了策略的鲁棒性,实现了对象无人机的全过程飞行.最后讨论了控制策略的优缺点,并展望了倾转旋翼无人机的发展前景及其在控制领域面临的挑战.

Research on Longitudinal Control Strategy Design in Transition Section of Tilt-Rotor UAV

Aiming at the longitudinal control problem of the transition section of tilt rotor UAV, based on the requirements of engineering application, this paper takes a certain type of tilt rotor UAV as the research object. Firstly, the research progress and development trend of domestic tilt rotor UAV are summarized. Secondly, the change of aerodynamic characteristics in the transition section is analyzed. According to the lift source in the transition section, the whole transition process is divided into variable pitch control section and aerodynamic control section. According to the relationship between forward speed and nacelle angle in each stage, the tilting transition scheme is determined. Thirdly, based on the control surface assignment scheme, the longitudinal control strategy in each stage of the transition process is designed. The robustness of the strategy is verified by simulation, and the whole flight process of the UAV is realized. Finally, the advantages and disadvantages of the control strategy are discussed, and the development prospect of tilt rotor UAV and its challenges in the control field are prospected.