Abstract
FanWing has been taken to the visual field because of its performance combination of fixed-wing aircraft and helicopter. Its flight mode is currently limited mainly by a remote control, while the research of automated flight control is on the rise. The fan wing could offer lift, thrust, and the additional pitch moment for longitudinal control. At the same time, the roll moment and the yaw moment can be generated by the differential rotation of the cross-flow fan to realize the lateral control. It provides the possibility for its emergency flight control when the aerodynamic control becomes inefficient at a low speed. The difficulties in designing the emergency control system in both the longitudinal and lateral controls are analyzed. And it emphasizes the importance of selecting its center of gravity and the emergency control method of longitudinal control in engineering. The simulation results show that as an emergency flight control system, fan wing control is feasible. The study of the fan wing control will provide a reference solution for its further engineering applications.
Highlights
Different from the conventional fixed-wing, rotor, and flapping-wing aircraft, FanWing [1] is a new principle and new concept aircraft
SOAR, one project of the European research framework program called Horizon 2020, endeavours to further develop the FanWing ultrashort take-off and landing (USTOL) vehicle to reduce fuel burn and carbon footprint associated with some helicopter and fix-wing airplane
The flight mode of FanWing is currently limited mainly by a remote control, while the research of automated flight control is on the rise
Summary
Different from the conventional fixed-wing, rotor, and flapping-wing aircraft, FanWing [1] is a new principle and new concept aircraft. Unlike the conventional fixed-wing aircraft susceptible to external wind gusts [12, 13], the flight dynamic of FanWing is mainly determined by the rotation speed of the crossflow fan. The flow velocity on the wing has little effect on the forces and moments derived by the fan wing, which is different from the aerodynamic forces that support the conventional fixed-wing airplane in flight. They are mainly determined by the rotation speed of the crossflow fan, the incoming flow velocity, and the inflow angle of the airflow. Similar to the conventional aircraft, the FanWing longitudinal control is realized through the forces and moments provided by the cross-flow fan. The lateral control system is realized by the differential control of the fan wing [16]
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