VERTICAL TAKE-OFF AND LANDING UNMANNED AERIAL VEHICLE HAVING FOLDABLE FIXED WING AND BASED ON TWIN-DUCTED FAN POWER SYSTEM

摘要

A vertical take-off and landing (VTOL) unmanned aerial vehicle having a foldable fixed wing and based on a twin-ducted fan power system. The unmanned aerial vehicle employs a twin-ducted fan power system (7) arranged at a tail portion of a fuselage in a transverse and tail propulsion arrangement to provide lift for vertical take-off and landing and propulsion for horizontal flight. By means of a control servo plane arranged at a duct exit at an angle, a vectored thrust is provided to enable a fast attitude change. A foldable wing configuration (3) is employed for the wing, such that when the aerial vehicle takes off vertically/flies at a low speed, the wing is folded to reduce the frontal area exposure to crosswind, and when the aerial vehicle is flying horizontally, the wing is expanded to obtain larger lift. The ducts and single wing are combined in an optimized manner by arranging the wing to be within a specific duct airflow region, such that the Coanda effect is created at a rear edge of the wing to improve the performance thereof. The aerial vehicle has flight operation in multiple modes, including vertical take-off and landing and high-speed cruising. The VTOL aerial vehicle has superior aerodynamic efficiency during hovering/low-speed flight, is resistant to turbulence during takeoff and landing/hovering, and enables low power consumption, low noise, and high safety and reliability.