基于滑模控制的折叠翼飞行器辅助机动研究

基于滑模控制策略,研究了折叠翼飞行器辅助机动问题.分析了系统折叠角与气动参数的关系,把机翼折叠角看成额外的控制输入,构造了包含折叠辅助机动的飞行器动力学模型.针对非线性系统,加入混合干扰,设计了非奇异动态终端滑模控制(NDTSMC)器,能够较好地抑制折叠翼飞行器的不确定性,同时完成姿态跟踪控制.仿真结果表明,NDTSMC改善了折叠翼飞行器的控制精度和鲁棒性能,具有较好的抖振消除效果.与传统飞行器相比,加入折叠辅助机动的折叠翼飞行器拥有更高的机动性和抗干扰能力.

Research on morphing-aided maneuver of folding-wing aircraft based on sliding mode control

Based on the sliding mode control strategy, the morphing-aided maneuver problem of the folding-wing aircraft is studied. The relationship between the aircraft folding angle and the aerodynamic parameters is analyzed. The wing folding angle is viewed as an extra control input and the dynamic model of the morphing-aided maneuver is constructed. For the nonlinearity and the hybrid disturbances of the system, a novel feedback linearization-based non-singular dynamic terminal sliding mode control (NDTSMC) approach is proposed. NDTSMC can restrain the uncertainty of the folding wing aircraft and complete the attitude tracking control. Simulation results show that the control precision and the robustness of the morphing aircraft are improved by NDTSMC, with a better chattering elimination. It is also shown that the folding-wing aircraft with morphing-aided maneuver has higher maneuverability and disturbance rejection capability when compared to the traditional aircraft.