滑模观测器和比例积分的超机动动态逆控制

Dynamic Inverse Control of Super-Maneuverable Aircraft Based on Sliding Mode Observer and PI

研究了一种基于Super-twisting算法的滑模观测器和比例积分的超机动飞机动态逆控制方法。首先分析考虑推力矢量下的超机动飞机非线性特性,建立飞机非线性仿真平台;然后在快回路中针对飞行环境下外部直接干扰力矩,采用Super-twisting算法的滑模观测器估计干扰力矩,设计补偿控制律进行干扰抑制;慢回路中采用经典的比例积分控制弥补由非线性对消引起的系统逆误差;最后对设计的控制律进行大迎角下的"眼镜蛇"机动。仿真结果表明,设计的控制律使超机动飞机具有良好的快速性和稳定性。

A dynamic inversion control method of super-maneuverable aircraft is studied, which is based on sliding mode observer using Super-twisting algorithm and PI. Firstly, analysis is made to the super maneuvering aircraft＇s nonlinear-characteristic with consideration of the thrust vector, and a nonlinear simulation platform of the aircraft is established. In the fast loop, the direct external disturbance torque is estimated using sliding mode observer of Super-twisting algorithm and then the compensation control law is designed for interference suppression. In the slow loop, the classical PI control is used to offset the system inversion error caused by the nonlinear cancellation. Finally, the control law is used in the cobra maneuver of large angle of attack. The simulation shows that the designed control law can make the super-maneuverable aircraft have a good rapidity and stability.