基于滚动时域优化的变后掠角飞机修正控制律设计

摘要

为了确保飞机在变后掠角过程中的飞行稳定性,提出了一种基于滚动时域优化(Receding horizon optimal,RHO)的修正控制方法.首先,采用反步方法进行标称控制律设计,提供基本的飞行稳定性和跟踪性能.其次,将指令滤波器表示成状态空间的形式,基于指令滤波器、飞机和积分跟踪误差的状态方程得到一个增广状态方程.然后,采用RHO方法进行修正控制律设计,在有限滚动时域内计算得到修正控制量,对标称控制器输出进行在线补偿,确保快速变后掠角过程中的飞行稳定性.最后,通过变后掠角飞机航迹倾斜角控制系统仿真对算法的有效性进行了验证.%In order to ensure the flight stability of aircraft during changing the sweep angle,a retrofit control method based on the receding horizon optimal (RHO)algorithm is proposed.Firstly,the nominal control law is designed by the backstepping technique,which is used to provide the basic flight stability as well as the tracking performance.Secondly,the transfer functions of the command filters are transformed into the state space form,and an augmented state equation is obtained based on the state equations of the aircraft,command filters and integral tracking error.Then,the retrofit control law is designed by RHO algorithm.In order to ensure the flight stability in the process of changing the sweep angle rapidly,the retrofit value is calculated within a finite horizon to compensate for the nominal con-troller in real-time.Finally,the effectiveness of the designed control method is tested through the simu-lations of the flight path angle control system.