A vertical take-off and landing unmanned aerial vehicle
An unmanned aerial vehicle, vertical take-off and landing technology, applied in the field of aviation science, can solve problems such as poor aircraft control performance, low aircraft efficiency, and aircraft crashes, and achieve the effects of excellent aerodynamic performance, long cruising time, and long cruising distance.
Active Publication Date: 2019-09-27
曹萍
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Problems solved by technology
Fixed-wing unmanned aerial vehicles have the advantages of long cruising time, long cruising distance, excellent aerodynamic performance, and good wind resistance, but fixed-wing unmanned aerial vehicles also have inherent limitations: they need a long take-off and landing runway The way of taking off and parachuting also requires a large operating space. The above shortcomings greatly limit the scope of use of fixed-wing unmanned aerial vehicles.
Rotor-wing unmanned aerial vehicles use rotors to generate forces and moments that balance gravity and flight operations. The biggest advantage of rotor-wing unmanned aerial vehicles is that they can take off and land vertically, hover in the air, or fly in any direction. Therefore, rotor-wing unmanned aerial vehicles do not need to provide The special take-off and landing runway has more applications, but the shortcomings of the rotor UAV are also obvious: short flight time, short cruising range, and poor wind resistance
[0003] From the date of the birth of the aircraft, people have been trying to make an aircraft that has the advantages of both fixed-wing aircraft and rotor aircraft, such as the American Osprey tilt-rotor aircraft, by changing the vertical state of the two horizontally arranged propellers to the horizontal state. Take off vertically and fly forward horizontally, but gradually rotate the vertically rotating propeller to the horizontal state during the movement, which greatly increases the difficulty of control and the risk of aircraft crash. After nearly 30 years of improvement, the Osprey tiltrotor still remains wreck
In addition to the tilt rotor aircraft, the XFV-1 aircraft in the United States takes off vertically through the tailstock supporting the nose upward, and then gradually turns the aircraft from the vertical state to the horizontal flight state through the joint action of the conventional rudder surface, because the engine thrust is required for vertical take-off The "dead weight" of the engine is too large, the efficiency of the aircraft is very low, and the operating torque generated by the rudder surface of the conventional fixed-wing aircraft is limited, the control performance of the aircraft is very poor, and the wind resistance is seriously insufficient, and the accident rate is too high
With the rise of multi-rotor unmanned aerial vehicles in recent years, Chengdu Zongheng Company has combined conventional fixed-wing unmanned aerial vehicles and quadrotors into a composite unmanned aerial vehicle, using electric quadrotors for vertical take-off and landing, and using fixed-wing engines and rudder surfaces In level flight, since the quadrotor is completely used to balance the gravity and provide operating torque during vertical takeoff and landing, the quadrotor and the required batteries account for a large part of the weight of the whole machine, and are completely useless in level flight. Therefore, the " Dead weight" is too large, the weight of the whole aircraft can only be on the order of tens of kilograms, which cannot be made larger, and the anti-torque torque of the fixed-wing engine at low speed is not well balanced. The disturbance generated by the four rotor windward parts of the current increases the difficulty of controlling the fixed wing state
Method used
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Embodiment 1
[0021] Such as figure 1 and figure 2 Shown, a kind of vertical take-off and landing unmanned aerial vehicle of present embodiment comprises body 1, wing 2, engine 3, engine propeller 4, aileron 5, flat tail 6, vertical tail 7, be connected in vertical tail 7 and flat tail 6 Four take-off and landing brackets 8 on the top, 4 connecting arms 9 connected on the wing 2, 4 motors 10 connected on the connecting arms 9, 4 rotors 11 connected on the 4 motors 10.
[0022] The four take-off and landing brackets 8 connected to the vertical tail 7 and the flat tail 6 are used to support the aircraft when the aircraft takes off and lands. When the aircraft takes off, the engine 3 is connected to the engine propeller 4 to rotate to generate vertical upward lift and the motor 10 drives the rotor 11 to rotate to generate the vertical upward lift. Provide vertical upward lift and operating moments on the three degrees of freedom of the aircraft pitch, roll and yaw; when the aircraft enters ...
Embodiment 2
[0028] Such as image 3 As shown, a kind of vertical take-off and landing unmanned aerial vehicle of the present embodiment, its operating principle is the same as embodiment 1, and difference is that described aircraft engine 3 is that an engine 3 drives two engine propellers 4 that rotate in opposite directions to form a coaxial system.
Embodiment 3
[0030] Such as Figure 4 As shown, a kind of vertical take-off and landing unmanned aerial vehicle of the present embodiment, its operating principle is the same as embodiment 1, and the difference is that described aircraft engine 3 is that two engines 3 drive two engine propellers 4 horizontally distributed in opposite directions of rotation. On both sides of the body 1.
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The invention belongs to the technical field of aviation, and relates to a vertical take-off and landing unmanned aerial vehicle, which is characterized in that: it includes a body, a wing, an engine, an engine propeller, an aileron, a horizontal tail, a vertical tail, and a vertical tail (or a wing or a horizontal tail) ), multiple connecting arms connected to the fuselage (or wings or horizontal tail or vertical tail), multiple motors connected to the connecting arms, and multiple rotors connected to multiple motors . A vertical take-off and landing unmanned aerial vehicle provided by the present invention can not only take off and land vertically like a rotorcraft, but also can fly at high speed like a fixed-wing aircraft, and can also maintain a long cruising time, a long cruising distance, and aerodynamic performance of the fixed-wing aircraft. It has the advantages of excellent wind resistance and good wind resistance, and can also fly with large load and large take-off weight.
Description
technical field [0001] The invention relates to a vertical take-off and landing unmanned aerial vehicle, which belongs to the field of aviation science and technology. Background technique [0002] UAVs can generally be divided into fixed-wing UAVs and rotary-wing UAVs according to their functions. Fixed-wing unmanned aerial vehicles have the advantages of long cruising time, long cruising distance, excellent aerodynamic performance, and good wind resistance. The way of taking off and parachuting also requires a large operating space. The above shortcomings greatly limit the scope of use of fixed-wing unmanned aerial vehicles. Rotor-wing unmanned aerial vehicles use rotors to generate forces and moments that balance gravity and flight operations. The biggest advantage of rotor-wing unmanned aerial vehicles is that they can take off and land vertically, hover in the air, or fly in any direction. Therefore, rotor-wing unmanned aerial vehicles do not need to provide The speci...
Claims
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IPC IPC(8): B64C27/26B64C27/32B64C29/00
CPCB64C27/26B64C27/32B64C29/0025B64U10/25B64U70/80B64U50/19B64U30/10B64U30/20
Inventor曹萍
Owner曹萍