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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。
Aiming at the problem of over-flight maneuvering flight control of aircraft, a new idea of compensating perturbation estimation by combining dynamic inverse with extended state observer is proposed. According to the principle of time-scale separation, the state of the airplane is divided into fast and slow variables, and two dynamic inverse controllers are designed respectively. In the fast loop and slow loop respectively, the extended state observer is introduced to estimate and compensate the uncertain part of the system to offset the influence of the uncertain part on the system dynamic characteristics. Finally, the control law was simulated by stalling maneuvering. The results show that under the condition of large parameter perturbation, the designed control law can control aircraft tracking control command, showing good stability and robustness.