Full-state wind field simulation system and method for wind resistance detection of unmanned aerial vehicle

Abstract

The invention discloses a full-state wind field simulation system and method for wind resistance detection of an unmanned aerial vehicle. The system comprises a system base, a distribution box, a system control cabinet, a modular wind wall, a protective net and a wind speed and direction sensor. The wind field simulation system is of a cuboid structure, independent fan arrays are embedded in modular wind walls, the three modular wind walls independently generate three single-direction wind fields forming 90-degree included angles, and wind fields of any size and any direction can be generated through space wind field vector superposition. The distribution box provides power support for the ventilation wall to work, and the system control cabinet can independently control the fan arrays. The protective net is fixed on the system base bracket, so that the unmanned aerial vehicle is prevented from causing system damage in the testing process; the wind speed and direction sensor senses wind speed and direction information of a wind field in a test area and quantitatively represents the simulated wind field. According to the invention, a wind field with any size and direction can be generated for an unmanned aerial vehicle wind resistance test, and necessary test platform support is provided for unmanned aerial vehicle wind resistance detection.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle testing, and in particular to a full-state wind field simulation system and method for unmanned aerial vehicle wind resistance detection. Background Art

[0002] With the rapid development of drone technology, its application fields are becoming increasingly extensive, covering military, civilian and other aspects. In the military field, drones are used for border patrol, reconnaissance and surveillance tasks; in the civilian field, drones are also widely used in search and rescue, security, aerial photography, precision agriculture, logistics and distribution. However, drones are often affected by various wind disturbances during flight, including ground effects, turbulence between buildings, strong winds in bad weather, etc. These wind disturbances will seriously affect the flight safety of drones, resulting in unstable flight attitude, position deviation, and may even cause serious accidents such as loss of control and crash of drones. The wind resistance of drones has become an indispensable part of drone quality performance testing, and it is urgent to establish a complete drone wind resistance testing technology and method.

[0003] At present, traditional wind tunnel tests can only simulate fixed wind fields in a single direction, and cannot simulate complex wind fields such as three-dimensional turbulence, crosswinds, wind shear, etc. in real environments. The wind field simulation devices proposed in other patents also have disadvantages such as complex structure, inability to achieve real wind field conditions, lack of real-time wind field feedback and adjustment capabilities, and limited test accuracy. For example, the unmanned aerial vehicle wind resistance test device described in patent CN 117799859 A can only simulate wind field information in a single direction and cannot generate wind fields in all states. Patent CN221394060 U uses multiple fans to form a ring or sphere, and adjusts the wind direction by controlling the speed and angle of each fan. The system structure is complex and has poor practicality. Summary of the invention

[0004] In view of the shortcomings of the existing technology, the present invention aims to propose a full-state wind field simulation system and method for UAV wind resistance detection. The system can simulate omnidirectional wind field disturbances and complex wind condition characteristics, and provide a three-dimensional continuous wind field, gradual wind field or sudden wind field test platform support for UAV wind resistance detection.

[0005] The present invention is achieved through the following technical solutions: The present invention provides a full-state wind field simulation system for unmanned aerial vehicle wind resistance detection, comprising: a system base, a distribution box, a system control cabinet, a modular wind wall, a protective net and a wind speed and direction sensor; the distribution box, the system control cabinet and the modular wind wall are all fixedly arranged on the system base; the protective net is fixedly arranged in the enclosed area of ​​the modular wind wall; the wind speed and direction sensor is fixedly arranged on the system base based on a detachable structure.

[0006] Furthermore, the bottom of the system base is supported by four bases, a UAV take-off and landing platform is arranged above it and four long pole brackets are fixed thereon, and a guide structure is arranged on the top of the system base to change the airflow direction of the top wind wall from a vertical direction to a horizontal direction and avoid interference with the set wind field caused by the interfering airflow caused by the ground effect.

[0007] Furthermore, a power control button is provided on the front of the distribution box, and a power input aviation plug is provided on the side thereof for power supply of the simulation system; three power output aviation plugs are also provided on the top of the distribution box, and the distribution box output aviation plugs are connected to the power supply and control signal input multiplexing aviation plug interface, and the power supply and control signal input multiplexing aviation plug interface is arranged on the modular side wind wall; it is used for transmission and exchange of power and control signals.

[0008] Furthermore, the system control cabinet is connected to the distribution box via cables inside the system base for power and data exchange, and a liquid crystal touch panel is integrated in the system control cabinet for controlling a single or multiple fan arrays through system programming to control the fan arrays to generate continuous, sudden or gradual wind fields.

[0009] Furthermore, the modular wind wall includes a modular side wind wall, a modular top wind wall and a modular front wind wall, and the three have the same structure, that is, a plurality of fan drive control modules and a plurality of independent fan arrays are embedded in the wind wall. The fan drive control modules respectively control a single independent fan, and each independent fan is individually controlled through the control commands issued by the system control cabinet, and finally the required wind field is generated.

[0010] Specifically, the modular top wind wall is supported and fixed by four long pole brackets on the system base.

[0011] Specifically, the protective net is fixed on four long pole brackets and is surrounded by four nets on the top, bottom, left and right sides.

[0012] Specifically, the wind speed and direction sensor is an ultrasonic wind speed and direction sensor with a range of 0-40m / s and an accuracy of 0.1m / s, which is used to sense the wind speed and direction information of the wind field in the test area, and then quantitatively represent the simulated wind field.

[0013] The present invention also discloses a full-state wind field simulation method based on unmanned aerial vehicle wind resistance detection, the method comprising the following steps: (1) The distribution box is turned on to supply power to the modular wind wall array, and the modular wind wall generates wind fields in three independent directions under the control of the control system; (2) Use wind speed and direction sensors fixed in the test area to measure the wind speed and direction information of the wind field generated by the superposition of the three modular wind walls, record it in the control system, and generate a comparison table of control parameters and wind field information; (3) Remove the wind speed and direction sensors and use the control system to generate the full-state wind field required for the test according to the test requirements.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a full-state wind field simulation system based on unmanned aerial vehicle wind resistance detection. The core of the simulation system is composed of three modular wind walls, each of which has an independent fan array embedded in it. The three modular wind walls independently generate three single-direction wind fields at 90-degree angles to each other. After the spatial wind field vector is superimposed, a wind field of any size and direction can be generated. The distribution box provides power support for the wind wall, and the system control cabinet can independently control the fan arrays to meet the combined control requirements of the three-sided independent fan arrays. The technical pain point that the existing device cannot generate a wind field of any size and direction in three-dimensional space is solved, and a controllable continuous wind field, gradual wind field, sudden wind field and other unmanned aerial vehicle wind resistance test system and method are provided for unmanned aerial vehicle wind resistance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a full-state wind field simulation system based on UAV wind resistance detection of the present invention; Figure 2 A base diagram of the system of the present invention; Figure 3 It is a front view of the system of the present invention; Figure 4 It is a side view of the system of the present invention; Figure markings: 1-system base; 11-base support; 12-UAV take-off and landing platform; 13-guide structure; 14-long pole bracket; 15-pin; 2-distribution box; 21-power control button; 22-output aviation plug; 23-input aviation plug; 3-system control cabinet; 4-modular side wind wall; 41-fan array; 42-fan drive control module; 43-power supply and control signal input multiplexing aviation plug interface; 5-modular top wind wall; 6-modular front wind wall; 7-protective net; 8-wind speed and direction sensor. DETAILED DESCRIPTION

[0016] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0017] The following is combined with Figure 1-4The present invention is further described with reference to the accompanying drawings and embodiments.

[0018] The present invention provides a full-state wind field simulation system for unmanned aerial vehicle wind resistance detection. The wind field simulation system is a rectangular parallelepiped structure. A modular wind wall has an independent fan array 41 embedded in it. Three modular wind walls independently generate three single-direction wind fields at 90-degree angles to each other. After superposition of spatial wind field vectors, a wind field of any size and direction can be generated. A distribution box 2 provides power support for the wind wall. A system control cabinet 3 can independently control the fan array 41 to meet the combined control requirements of the three independent fan arrays. A protective net 7 is fixed on a bracket of a system base 1 to prevent the unmanned aerial vehicle from causing system damage during the test.

[0019] Specifically, Figure 1 As shown, the system includes: a system base 1, a distribution box 2, a system control cabinet 3, a modular side wind wall 4, a modular top wind wall 5, a modular front wind wall 6, a protective net 7 and a wind speed and direction sensor 8; four base supports 11 are arranged at the bottom of the system base 1, a drone landing platform 12 is arranged above the system base 1, and four identical long pole brackets 14 are fixedly arranged, and a guide structure 13 is arranged on the top of the system base 1, and the guide structure 13 is used to change the airflow direction of the top wind wall from a vertical direction to a horizontal direction, and to avoid interference of the interference airflow caused by the ground effect on the set wind field; the distribution box 2 is fixedly arranged on the top of the system base 1, and a power control button 21 is arranged on the front of the distribution box 2, and three power output aviation plugs 22 are arranged on the top thereof, and a power input aviation plug 23 is arranged on the side of the distribution box 2 for simulating the power supply of the system; the system control cabinet 3 is fixedly arranged On the system base 1; the modular side wind wall 4 is fixedly arranged on the system base 1, and an independent fan array 41 is embedded in it. The modular side wind wall 4 is integrated with a fan drive control module 42, and a power supply and control signal input multiplexing aviation plug interface 43 is reserved; the modular top wind wall 5 is supported and fixed by four long rod brackets 14 on the system base 1; the modular front wind wall 6 is fixedly arranged on the system base 1; the protective net 7 is fixed in the enclosed area of ​​the modular side wind wall 4, the top wind wall 5 and the front wind wall 6; the wind speed and direction sensor 8 is fixedly installed on the UAV take-off and landing platform 12 based on a detachable structure; the wind speed and direction sensor 8 is a high-precision ultrasonic principle wind speed and direction sensor, which is used to sense the wind speed and direction information of the wind field in the test area, and quantitatively represent the simulated wind field; the wind speed and direction sensor 8 has a range of 0-40m / s and an accuracy of 0.1m / s.

[0020] like Figure 2As shown in the system base diagram, the guide mechanism 13 arranged on the top of the system base 1 is designed to be in the shape of a parabolic slope, which can turn the top wind field flow direction generated by the top wind wall 5 to the horizontal direction, avoiding the influence of the reflected airflow from the base on the wind field. The four long rod brackets 14 arranged above the system base 1 are fixed to the system base through the card slot, which can be easily disassembled and freely assembled. The top of the long rod bracket 14 is inserted into the card slot of the top wind wall 5 to support and fix the top wind wall. Four pins 15 are distributed around the system base 1, which can be used to position and fix the side wind wall 4 and the front wind wall 6 respectively. The distribution box 2 and the system control cabinet 3 are fixed on the top of the system base 1. The distribution box 2 and the system control cabinet 3 are connected through the internal cables of the system base 1 to exchange power and data. The system control cabinet 3 can control a single or multiple fan arrays 41 through system programming, and control the fan array 41 to generate a continuous, sudden or gradual wind field.

[0021] like Figure 3 In the side view of the system shown, the side wind wall 4 is embedded with several independent fan arrays 41, and several fan drive control modules 42 are set on the left and right sides. The fan drive control modules 42 can control a single independent fan respectively, and control each independent fan individually through the control command issued by the system control cabinet 3, and finally generate the wind field required for the test. The power supply and control signal input multiplexing aviation plug interface 43 is connected to the distribution box output aviation plug 22 for power and control signal transmission and exchange.

[0022] In addition, the modular wind wall includes a modular side wind wall 4, a modular top wind wall 5 and a modular front wind wall 6. The modular side wind wall 4, the modular top wind wall 5 and the modular front wind wall 6 have the same structure. The modular top wind wall 5 and the modular front wind wall 6 both have the fan array 41, the fan drive control module 42, and the power supply and control signal input multiplexing aviation plug interface 43 that the modular side wind wall 4 has. Preferably, the size of the modular side wind wall 4, the modular top wind wall 5 and the modular front wind wall 6 and the number of the fan array 41 can be customized according to actual conditions.

[0023] like Figure 4 The figure shows a front view of the invention system. Preferably, the guide structure 13 is arranged inside the area surrounded by three wind walls and will not affect the wind field in the test area.

[0024] The present invention also provides a full-state wind field simulation method for unmanned aerial vehicle wind resistance detection, which specifically includes the following steps: (1) the distribution box 2 starts to supply power to the modular wind wall array, and the modular wind walls generate wind fields in three independent directions respectively under the control of the control system; (2) the wind speed and direction information of the wind field generated by the superposition of the three modular wind walls is measured by a wind speed and direction sensor 8 fixed in the test area, and recorded in the control system to generate a control parameter and wind field information comparison table; (3) the wind speed and direction sensor 8 is removed, and the full-state wind field required for the test is generated by the control system according to the test requirements.

[0025] Example 1 (1) System structure This system constructs a three-dimensional controllable wind field environment in the experimental space by arranging three mutually perpendicular wind walls. The three wind walls are respectively set at the left view (x-axis direction), rear view (y-axis direction) and top (z-axis direction) of the flight test space. The three wind walls are orthogonal to each other to form an "L"-shaped space boundary. Each wind wall is embedded N × M The fan module can independently adjust the speed of the fan, and the fan can independently control the speed of the fan through the control system 3 to generate a specified wind speed.

[0026] (2) Wind field generation principle and mathematical model 1) Unidirectional wind field model In three orthogonal directions ( x , y , z ) are respectively generated by the fan array 41 with wind speed vectors: The wind velocity field generated by the horizontal wind wall is: ; The wind wall in the depth direction generates the wind velocity field: ; The vertical wind wall generates wind velocity field: .

[0027] in , is the spatial position related wind speed value formed under the control of the fan array 41 in each direction (can be set to a constant value or a function distribution), is the unit vector direction.

[0028] 2) Wind field vector superposition model Through the linear superposition of the above three orthogonal wind fields, the system can simulate wind speed in any direction: ; Right now: ; Target wind speed vector ,in is the target wind direction unit vector, which can be expressed as: ; The three-directional wind speed target components that need to be achieved are: ; The vector target wind speed can be achieved by adjusting the output of the fan arrays 41 in three directions.

[0029] (3) Control strategy implementation The user inputs the desired wind speed direction (unit vector) and wind speed magnitude, and the system calculates the required three-directional wind speed target components , dispatching three wind wall fan arrays 41 to achieve wind speed output, thereby providing real-time feedback of error correction control output.

[0030] The method of the present invention can realize full-state wind field simulation and meet the full-state wind field wind resistance detection needs of UAVs.

[0031] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the contents disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0032] It should be understood that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A full-state wind field simulation system for UAV wind resistance detection, characterized in that: include: System base, distribution box, system control cabinet, modular wind wall, protective net and wind speed and direction sensor; the distribution box, system control cabinet and modular wind wall are all fixedly arranged on the system base; the protective net is fixedly arranged in the enclosed area of ​​the modular wind wall; the wind speed and direction sensor is fixedly arranged on the system base based on a detachable structure.

2. A full-state wind field simulation system for UAV wind resistance detection according to claim 1, characterized in that: The bottom of the system base is supported by four bases, and a UAV take-off and landing platform and four long pole brackets are fixed above it. A guide structure is provided on the top of the system base to change the airflow direction of the top wind wall from vertical to horizontal, and to avoid interference with the set wind field caused by the interference airflow caused by the ground effect.

3. The full-state wind field simulation system for UAV wind resistance detection according to claim 1 is characterized in that: A power control button is provided on the front of the distribution box, and a power input aviation plug is provided on the side thereof for power supply of the simulation system; three power output aviation plugs are also provided on the top of the distribution box, and the distribution box output aviation plugs are connected to the power supply and control signal input multiplexing aviation plug interface, and the power supply and control signal input multiplexing aviation plug interface is provided on the modular side wind wall; it is used for transmission and exchange of power and control signals.

4. The full-state wind field simulation system for UAV wind resistance detection according to claim 1 is characterized in that: The system control cabinet is connected to the distribution box via cables inside the system base for power and data transmission exchange, and a liquid crystal touch panel is integrated in the system control cabinet for controlling a single or multiple fan arrays through system programming to control the fan arrays to generate continuous, sudden or gradual wind fields.

5. The full-state wind field simulation system for UAV wind resistance detection according to claim 1 is characterized in that: The modular wind wall includes a modular side wind wall, a modular top wind wall and a modular front wind wall, and the three have the same structure, that is, a plurality of fan drive control modules and a plurality of independent fan arrays are embedded in the wind wall. The fan drive control modules respectively control a single independent fan, and each independent fan is individually controlled through the control command issued by the system control cabinet, and finally the required wind field is generated.

6. A full-state wind field simulation system for UAV wind resistance detection according to claim 5, characterized in that: The modular top wind wall is supported and fixed by four long pole brackets on the system base.

7. The full-state wind field simulation system for UAV wind resistance detection according to claim 1 is characterized in that: The protective net is fixed on four long rod brackets and is surrounded by four sides of nets: top, bottom, left, and right.

8. The full-state wind field simulation system for UAV wind resistance detection according to claim 1 is characterized in that: The wind speed and direction sensor is an ultrasonic wind speed and direction sensor with a range of 0-40m / s and an accuracy of 0.1m / s, which is used to sense the wind speed and direction information of the wind field in the test area, and then quantitatively represent the simulated wind field.

9. A full-state wind field simulation method for a full-state wind field simulation system for UAV wind resistance detection according to any one of claims 1 to 8, characterized in that: The method specifically comprises the following steps: Step S1: The distribution box starts to supply power to the modular wind wall array, and the modular wind wall generates wind fields in three independent directions respectively under the control of the control system; Step S2: using a wind speed and direction sensor fixed in the test area to measure the wind speed and direction information of the wind field generated by the superposition of the three modular wind walls, record it in the control system, and generate a control parameter and wind field information comparison table; Step S3: Remove the wind speed and direction sensors, and use the control system to generate a full-state wind field required for the test according to the test requirements.

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