A side-window sliding-flow ducted UAV

Abstract

The present invention relates to a side-window slip-flow ducted unmanned aerial vehicle, which is composed of a side-window slip-flow regulator, a polygonal or circular duct, a power device, and an unmanned aerial vehicle control device. The side-window slip-flow regulator includes a diversion rudder, a flow-blocking plate, a pull rod, and a steering gear. The side-window slip-flow regulator is symmetrically installed on the side wall of the duct, and its longitudinal position is above or below the propeller blade. The side-window slip-flow regulator of the present invention can guide the airflow outside the duct of the unmanned aerial vehicle to flow through the upper wing surface of the diversion rudder, generating an upward lift force and a horizontal thrust force, solving the problem that conventional ducted unmanned aerial vehicles do not have a direct control channel for horizontal movement, enabling high-precision position control of the ducted unmanned aerial vehicle. At the same time, the above structure is simple, lightweight, has few components, is convenient for assembly, and has a low production cost.

Description

Technical Field

[0001] The present invention belongs to the field of aviation technology and relates to a side-window slip-flow ducted unmanned aerial vehicle (UAV). Background Art

[0002] With the rapid development of various underground facilities such as power tunnels and urban utility tunnels, the demand for UAV inspections in narrow and enclosed underground spaces is increasing day by day. Ducted UAVs have characteristics such as small size, large payload, safety and reliability, and are very suitable for applications in the above-mentioned task scenarios. However, most existing ducted UAVs use movable control surfaces installed below the propeller for attitude control, and indirectly control the position by controlling the attitude, resulting in a slow response of the position control loop and making it difficult to meet the application requirements of high-precision position control of UAVs in narrow and enclosed spaces. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to overcome the deficiencies of the above-mentioned prior art and provide a side-window slip-flow ducted UAV, which adds a direct horizontal motion control channel and improves the position control accuracy of the UAV.

[0004] The technical solution of the present invention: a side-window slip-flow ducted UAV, characterized in that it adopts a structure for directly controlling the horizontal motion of the UAV,

[0005] The structure includes a side-window slip-flow regulator, a polygonal or circular duct, a power device, and a UAV control device;

[0006] The polygonal or circular duct isolates the internal and external airflows of the duct and is used to generate the required air pressure difference inside and outside the duct provided by the side-window slip-flow regulator;

[0007] The power device provides lift for the UAV and provides the required air pressure difference inside and outside the duct for the side-window slip-flow regulator, and is a single-propeller power system or a coaxial dual-propeller power system; the power device is fixedly connected to the polygonal or circular duct;

[0008] The UAV control device is used to adjust the opening degree of the side-window slip-flow regulator and is fixedly connected to the power device;

[0009] The side-window slip-flow regulator generates an upward lift and a horizontal thrust by guiding the external airflow of the UAV duct to flow into the duct, so as to achieve position control; the longitudinal position of the side-window slip-flow regulator is located above the propeller or below the propeller or between the upper and lower propellers of the coaxial dual-propeller power system, and is fixedly connected to the polygonal or circular duct;

[0010] When the side-window slip-flow ducted UAV is flying, the UAV control device adjusts the opening degree of the side-window slip-flow regulator, generates a horizontal thrust according to the demand, and thus accurately controls the horizontal speed and position of the UAV.

[0011] The side window slipstream regulator includes a flow guiding rudder, a flow blocking plate, a pull rod, and a steering gear; the flow guiding rudder is hinged to the duct of the unmanned aerial vehicle; the flow blocking plate is located at both ends of the flow guiding rudder and is fixedly connected to the outer wall of the duct; the pull rod is respectively connected to the flow guiding rudder and the steering gear, and the steering gear is installed on the outer wall of the duct. The flow blocking plate guides the high-speed airflow to flow into the opening formed by the flow guiding rudder and the duct, which is beneficial to generating lift with stable direction and thrust in the horizontal direction.

[0012] The top view of the polygonal or circular duct is a regular quadrilateral, a regular hexagon, a regular octagon, or a circle. The above configurations are symmetric structures, which are beneficial to the installation of the side window slipstream regulator and help to simplify the control logic.

[0013] The number of the side window slipstream regulators is even, and they are symmetrically installed on the side walls of the duct. The side window slipstream regulators installed at different positions will generate horizontal thrusts in different directions. To achieve the omnidirectional control of the unmanned aerial vehicle and simplify the control logic, the number of the side window slipstream regulators is even, and they are symmetrically installed on the side walls of the duct.

[0014] The flow guiding rudder has an airfoil structure and a roller at the lower part. The airfoil structure can generate greater lift than the flat plate structure, which is beneficial to control.

[0015] The present invention has the following advantages compared with the prior art:

[0016] (1) In the existing control technology of ducted unmanned aerial vehicles, there is no mechanism for directly controlling the horizontal position. Instead, the position is indirectly controlled by controlling the attitude, resulting in a slow response of the position control loop and making it difficult to meet the application requirements of high-precision position control of ducted unmanned aerial vehicles in a confined and narrow space. The side window slipstream regulator of the present invention can guide the high-speed airflow to flow through the airfoil surface of the flow guiding rudder to generate upward lift and horizontal thrust, solving the problem that conventional ducted unmanned aerial vehicles have no horizontal motion control channel and enabling high-precision position control of ducted unmanned aerial vehicles.

[0017] (2) At the same time, the present invention is simple, light, has few components, is convenient for assembly, and has a low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an embodiment of an unmanned aerial vehicle using a circular side window slipstream type duct;

[0019] Figure 2 is a schematic diagram of an embodiment of an unmanned aerial vehicle using a regular octagon side window slipstream type duct;

[0020] Figure 3 is a structural diagram of the side window slipstream regulator in the present invention;

[0021] Figure 4 is a sectional view of the structure of the flow guiding rudder in the present invention. Detailed Embodiments

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] As Figure 1 , Figure 2 shown, according to the embodiments provided by the present invention, the side-window slip-flow ducted drone includes a polygonal or circular duct 1, a side-window slip-flow regulator 2, a power device, and a drone control device. The power device and the drone control device are fixedly connected to the polygonal or circular duct 1. When the drone is flying, the power device provides lift for the aircraft. During position control, since the horizontal thrust directions generated between multiple side-window slip-flow regulators 2 are different from each other, the drone control device can adjust the opening degree of the corresponding side-window slip-flow regulator 2 as needed, so that the drone generates a speed in the desired direction, thereby completing high-precision position control.

[0024] The number of the side-window slip-flow regulators 2 is even, and they are symmetrically installed on the side wall of the polygonal or circular duct 1. The side-window slip-flow regulators 2 are convenient to install and firmly fixed.

[0025] The polygonal or circular duct 1 is fixedly connected to the power device, and the top view shape of the fixed duct is a regular quadrilateral, a regular hexagon, a regular octagon, or a circle.

[0026] The longitudinal position of the side-window slip-flow regulator 2 is above the propeller or below the propeller ( Figure 1 ) or between the upper and lower propellers of a coaxial dual-propeller power system ( Figure 2 ).

[0027] As Figures 1 to 3 shown, the side-window slip-flow regulator 2 is composed of a baffle 3, a diversion rudder 4, a pull rod 5, and a servo 6. The diversion rudder 4 is hinged to the fixed duct 1, the pull rod 5 is connected to the diversion rudder 4 and the servo 6, and the baffle 3 and the servo 6 are installed on the fixed duct. The side-window slip-flow regulator 2 has a simple structure, few components, convenient assembly, and low production cost.

[0028] As Figure 4 shown, when the drone control device adjusts the opening degree of the side-window slip-flow regulator 2: the drone control device transmits a control signal for deflecting a certain angle to the servo 6, the rocker arm of the servo 6 generates a deflection angle, and then drives the pull rod 5 to move downward. The pull rod 5 is connected to the upper rudder angle of the diversion rudder 4, driving the diversion rudder 4 to deflect, and completing the control of the opening degree of the side-window slip-flow regulator 2. Different deflection angles of the diversion rudder 4 result in different magnitudes of horizontal thrust (see Figure 4 ), and the drone control device can change the opening degree according to actual needs to complete high-precision position control.

[0029] As Figure 3 and Figure 4As shown, the flow deflector 4 has an airfoil structure and a roller at the lower part, which can be hinged to the fixed duct 1. The servo 6 is controlled by the UAV control device to drive the flow deflector 4 to deflect, changing the opening of the side window slipstream regulator. The power device guides the air flow to flow through the wing surface of the flow deflector 4 to generate an internal and external air pressure difference, and then generates a vector thrust to achieve high-precision position control.

[0030] As Figure 3 shown, the baffle 3 is a fan-shaped structure, located at both ends of the flow deflector 4, and is fixedly connected to the outer wall of the fixed duct 1. The function of the baffle 3 is to block the air flow from entering the duct interior from the side of the flow deflector 4, which can improve the control efficiency of the flow deflector 4.

[0031] As Figure 3 With Figure 4 shown, the side window slipstream regulator 2 and the power device guide the external gas of the duct to flow into the duct, and can also play an air flow pressurization effect, improve the energy conversion efficiency of the dual-rotor system, save battery power, and extend the endurance time.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes may be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A side-window slip-flow ducted unmanned aerial vehicle, characterized in that: It adopts a structure for directly controlling the horizontal movement of the unmanned aerial vehicle, and the structure includes a side-window slip-flow regulator, a polygonal or circular duct, a power device, and an unmanned aerial vehicle control device; The polygonal or circular duct isolates the internal and external airflows of the duct and is used to generate the required air pressure difference inside and outside the duct provided by the side-window slip-flow regulator; The power device provides lift for the unmanned aerial vehicle and provides the required air pressure difference inside and outside the duct for the side-window slip-flow regulator, and is a single-propeller power system or a coaxial dual-propeller power system; the power device is fixedly connected to the polygonal or circular duct; The unmanned aerial vehicle control device is used to adjust the opening degree of the side-window slip-flow regulator and is fixedly connected to the power device; The side-window slip-flow regulator generates an upward lift and a horizontal thrust by guiding the external airflow of the unmanned aerial vehicle duct to flow towards the inner side of the duct, thereby realizing horizontal movement control; the longitudinal position of the side-window slip-flow regulator is above the propeller or below the propeller or between the upper and lower propellers of the coaxial dual-propeller power system, and is fixedly connected to the polygonal or circular duct; When the side-window slip-flow ducted unmanned aerial vehicle is flying, the unmanned aerial vehicle control device adjusts the opening degree of the side-window slip-flow regulator to generate a horizontal thrust according to requirements, thereby accurately controlling the horizontal speed and position of the unmanned aerial vehicle; The side-window slip-flow regulator includes a diversion rudder, a baffle, a pull rod, and a steering gear; the diversion rudder is hinged to the unmanned aerial vehicle duct; the baffle is located at both ends of the diversion rudder and is fixedly connected to the outer wall of the duct; the pull rod is respectively connected to the diversion rudder and the steering gear, and the steering gear is installed on the outer wall of the duct; The side-window slip-flow regulator can guide the high-speed airflow to flow through the airfoil surface of the diversion rudder to generate an upward lift and a horizontal thrust, solves the problem that the conventional ducted unmanned aerial vehicle has no horizontal movement control channel, and realizes high-precision position control of the ducted unmanned aerial vehicle; The number of the side-window slip-flow regulators is even and they are symmetrically installed on the side walls of the duct. The side-window slip-flow regulators installed at different positions will generate horizontal thrusts in different directions. To achieve the omnidirectional control of the unmanned aerial vehicle and simplify the control logic, the number of the side-window slip-flow regulators is even and they are symmetrically installed on the side walls of the duct; The diversion rudder has an airfoil structure and has rollers at the lower part. The airfoil structure can generate a greater lift compared with the flat plate structure, which is beneficial to control.

2. The side-window slip-flow ducted unmanned aerial vehicle according to claim 1, characterized in that: The top view of the polygonal or circular duct is a regular quadrilateral, a regular hexagon, a regular octagon, or a circle.

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