ABSTRACT
To solve the problem of cargo suddenly becoming stuck on the guide rail during the traction stage of ultra-low-altitude reloading of air cargo, a fuzzy sliding-mode variable structure control method with input and output feedback linearization is proposed. Firstly, according to the aircraft dynamics equation, a longitudinal mathematical model of the aircraft under the condition of a cargo-stuck fault is derived, and then the mathematical model is decoupled and linearized using input–output feedback linearization theory. Furthermore, a fuzzy sliding-mode controller with fuzzy control theory and sliding-control method is designed to track the system speed and attitude angle. Finally, the simulation results show that the designed controller has a good control effect.
