Fuzzy Adaptive Sliding Mode Attitude Control of Quaternion Model for Aircraft Based on Back-stepping Method

This paper investigates the adaptive sliding mode attitude control of quaternion aircraft model based on fuzzy approximation principle. Firstly, a sliding mode controller is designed based on the back-stepping method for the nonlinear aircraft model. Secondly, a fuzzy approximation algorithm is designed to compensate for the unknown and uncertain parts of the aircraft system. Thirdly, we construct a sliding mode controller, which ensures the stability and convergence of the entire closed-loop system through the adjustment of fuzzy adaptive law. Finally, the anti-interference performance of the controller is verified by simulations, which show that the proposed method has good control performance.