PROJECT TITLE :

Fuzzy Adaptive Output Feedback Tracking Control of VTOL Aircraft With Uncertain Input Coupling and Input-Dependent Disturbances

ABSTRACT:

This paper proposes fuzzy adaptive output feedback tracking control methodology for VTOL (vertical takeoff and landing) aircraft. Since uncertainties exist within the input coupling parameter thanks to its dependence on the physical parameters, and unknown disturbances can occur similarly in the form of input-dependent accelerations in dynamics, which ought to be compensated at the same time. To this end, the dynamics with input-dependent disturbances are initial rigorously derived based on the overall type of acceleration disturbance vector in VTOL system. Second, the nonlinear velocity observer is meant to estimate the speed information not accessible in the actual situation such that the output feedback tracking control can be achieved even within the presence of unsure input coupling and disturbances, that isn't doable in the case of previous works. Third, fuzzy adaptive observer is meant to estimate each unknown input coupling coefficient and input-dependent disturbances. Finally, the fuzzy adaptive output tracking controller is meant based mostly on the nonlinear velocity observer and also the fuzzy adaptive observer. The trajectory tracking errors can be guaranteed to be globally ultimately bounded and their final bounds will be adjusted appropriately. Both stability analysis and simulation results demonstrate the effectiveness of the proposed technique against uncertainties and disturbances in VTOL system.