Aircraft detection 1 Antennas 1 Disturbance observer 1 Finite-time convergence 1 Finite-time tracking control 1 Manipulators 1 Navigation 1 Non-singular terminal sliding mode controls 1 Non-singular terminal sliding modes 1 Observer-based 1 Quad rotors 1 Quadrotor unmanned aerial vehicles 1 Robot applications 1 Sliding mode control 1 Tracking control approach Unmanned aerial vehicles (UAV) 1 Wind perturbations 1 disturbance observer 1 finite-time convergence 1 non-singular terminal sliding mode 1 quadrotor unmanned aerial vehicle 1 wind perturbation 1