A Backstepping Sliding Mode Control Method for Morphing Aircraft Based on Improved PIO Algorithm

Abstract

This paper investigates the extant approach for morphing aircraft control. For the aerodynamic uncertainty and coupling among morphing process, we proposed a sliding mode control scheme based on backstepping design approach, in which the Extended State Observer (ESO) is introduced to estimate internal and external disturbance in flight. The stability of the controller is proved by Lyapunov theorem of stability. The height subsystem and flight path angle subsystem are stabilized by proposed scheme respectively. Besides, the parameters of proposed controller are optimized by an improved Pigeon-inspired optimization (PIO) algorithm to obtain better control results. Numerical simulation is implemented to verify the effectiveness of proposed control method and improved PIO algorithm, where the aerodynamic uncertainty caused by morphing is considered. The simulation results show that this sliding mode controller and the improved PIO algorithm have good tracking performance.