基于扩张状态观测器的动态逆过失速机动飞行控制

Post-stall maneuver flight control using extended state observer based dynamic inversion

针对飞机过失速机动飞行控制问题,提出了一种将动态逆与扩张状态观测器相结合进行扰动估计补偿的新思路。根据时标分离原则将飞机状态分为快变量和慢变量,并分别设计了两个回路的动态逆控制器。在快慢回路分别引入扩张状态观测器对系统的不确定部分进行估计补偿,抵消不确定部分对系统动态特性的影响。最后对控制律进行了过失速机动仿真。结果表明,在存在较大参数摄动情况下,设计的控制律能控制飞机跟踪控制指令,表现出良好的稳定性和鲁棒性。

A new idea of dynamic inversion control using extended and compensate was proposed for post-stall maneuver flight control. state observer to estimate disturbance The flight state variables were separa- ted into fast and slow variables sub-system in terms of time scaling separation principle, and the dynamic inversion control law was adopted to the two systems. To counteract the influence of system uncertainty, extended state observer was applied to the two systems to estimate and compensate uncertainty. Finally, post-stall maneuver flight simulation was done using the control law of this paper. The results show that e- ven though there is large parameter perturbation existing in system, the control law designed could ensure the airplane to track the control inputs well, and achieved high dynamic performance and robustness per- forlllance.