Atmospheric turbulence environment test device and method for aircraft

Abstract

The invention discloses an atmospheric turbulence environment test device and method for an aircraft. The atmospheric turbulence environment test device for the aircraft comprises an environment simulation chamber, an atmospheric turbulence generation module, a control module and a test recording module, the environment simulation chamber is a closed space, the atmospheric turbulence generation module is located in the environment simulation chamber, and the atmospheric turbulence generation module is used for heating and cooling air in the environment simulation chamber to form atmospheric turbulence; the control module is used for controlling the intensity of the atmospheric turbulence formed by the atmospheric turbulence generation module as test intensity; the test recording module is arranged in the environment simulation chamber and is used for recording flight data of the test aircraft hovering at the preset height of the environment simulation chamber. According to the invention, the atmospheric turbulence environment test environment of the aircraft can be established, the stability and controllability of the atmospheric turbulence intensity are ensured, and the problem of low-altitude aircraft turbulence environment adaptability assessment and verification can be solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of flight test technology, and in particular to an atmospheric turbulence environment test device and method for an aircraft. Background Art

[0002] With the development of the low-altitude economy, the research and development, manufacturing, inspection and testing, and test verification technologies of low-altitude aircraft have become a hot topic of research for engineers.

[0003] Due to the particularity of the use environment of low-altitude aircraft, it has extremely high requirements for safety, stability, and reliability. It is necessary to simulate various atmospheric environments in the laboratory, conduct environmental adaptability tests, verify the aircraft design, discover potential problems, optimize performance, and ultimately ensure that the aircraft can be safely put on the market. Atmospheric turbulence is an irregular and complex flow state in the atmosphere, especially in the atmospheric boundary layer. The atmosphere is greatly affected by surface friction, which will produce turbulent motions of various scales, which will greatly affect the flight performance of the aircraft and bring problems such as instability and increased resistance to the aircraft.

[0004] Since actual atmospheric turbulence varies from time to time and from place to place, it is difficult to maintain a relatively stable state for a long time. It is difficult to achieve uniform turbulence distribution in a long-distance test site, and detailed monitoring of path turbulence distribution is often difficult. The existing low-altitude aircraft testing process usually requires field experiments, which are costly and greatly affected by complex environments, making it difficult to test aircraft under multi-scale turbulent environment conditions. Summary of the invention

[0005] The present invention provides an atmospheric turbulence environment test device and method for an aircraft, so as to establish an atmospheric turbulence environment test environment for the aircraft and ensure the stability and controllability of the atmospheric turbulence intensity, which is beneficial to solving the problem of assessment and verification of the adaptability of low-altitude aircraft to turbulence environment.

[0006] In a first aspect, an embodiment of the present invention provides an atmospheric turbulence environment test device for an aircraft, the device comprising an environment simulation chamber, an atmospheric turbulence generation module, a control module, and a test recording module;

[0007] The environment simulation chamber is a closed space, the atmospheric turbulence generating module is located in the environment simulation chamber, and the atmospheric turbulence generating module is used to heat and cool the air in the environment simulation chamber to form atmospheric turbulence;

[0008] The output end of the control module is connected to the input end of the atmospheric turbulence generating module, and the control module is used to send a control signal to the atmospheric turbulence generating module to control the intensity of the atmospheric turbulence generated by the atmospheric turbulence generating module to be the test intensity;

[0009] The test recording module is arranged in the environmental simulation chamber, and is used to record the flight data of the test aircraft hovering at a preset height in the environmental simulation chamber.

[0010] Optionally, the atmospheric turbulence generating module includes a heating panel and a cooling panel;

[0011] The heating panel is located on the first inner surface of the environmental simulation chamber, the cooling panel is located on the second inner surface of the environmental simulation chamber, and the first inner surface and the second inner surface are arranged opposite to each other; the air in the environmental simulation chamber includes a bottom air layer, a middle air layer and a top air layer arranged in sequence;

[0012] The heating panel is used to heat the bottom air layer of the environmental simulation chamber; the cooling panel is used to cool the top air layer of the environmental simulation chamber;

[0013] The bottom air layer, the middle air layer and the top air layer are used to form atmospheric turbulence.

[0014] Optionally, the atmospheric turbulence environment test device for an aircraft further includes at least one temperature detection module;

[0015] The temperature detection module is located in the environmental simulation room, the output end of the temperature detection module is connected to the input end of the control module, and the temperature detection module is used to detect the temperature data of at least one position in the environmental simulation room and send the temperature data to the control module;

[0016] The control module is specifically used to control the heating temperature of the heating panel and the cooling temperature of the cooling panel according to the temperature data, so as to adjust the temperature difference ΔT between the heating temperature and the cooling temperature, and control the intensity r0 of the atmospheric turbulence jointly formed by the heating panel and the cooling panel, wherein the intensity r0 of the atmospheric turbulence satisfies:

[0017] r0=48(ΔT) -0.81 .

[0018] Optionally, the shape of the environmental simulation chamber includes a cuboid or a cube;

[0019] The atmospheric turbulence environment test device for the aircraft comprises a plurality of the temperature detection modules, and the temperature detection modules are arranged at the apex position of the environmental simulation chamber;

[0020] The temperature detection modules are arranged in one-to-one correspondence with the vertex positions of the environmental simulation chamber.

[0021] Optionally, the aircraft atmospheric turbulence environment test device further includes a protection net and an aircraft take-off and landing platform;

[0022] The protection net is located at a preset position in the environmental simulation room, the aircraft landing platform is located on the bottom surface of the environmental simulation room, and the aircraft landing platform is used to carry the test aircraft.

[0023] Optionally, the atmospheric turbulence environment test device for the aircraft further includes an observation window and an inlet and outlet passage;

[0024] The observation window and the inlet and outlet passages are located on any side of the environmental simulation chamber.

[0025] Optionally, the test recording module includes a position detection unit and a posture angle detection unit;

[0026] The output end of the position detection unit is connected to the first detection input end of the control module, and the output end of the attitude angle detection unit is connected to the second detection input end of the control module;

[0027] The position detection unit is used to detect the position of the test aircraft when flying in the environmental simulation chamber, and send it to the control module; the attitude angle detection unit is used to detect the attitude angle of the test aircraft when flying in the environmental simulation chamber, and send it to the control module; the control module is also used to determine the flight performance of the test aircraft based on the position and the attitude angle.

[0028] In a second aspect, an embodiment of the present invention further provides an atmospheric turbulence environment test method for an aircraft, wherein the atmospheric turbulence environment test method for an aircraft tests the aircraft according to an atmospheric turbulence environment test device for the aircraft, and the atmospheric turbulence environment test method for the aircraft comprises:

[0029] Generating atmospheric turbulence by an atmospheric turbulence generating module, wherein the intensity of the atmospheric turbulence is a test intensity;

[0030] Starting the test aircraft and controlling the test aircraft to hover at a preset height of the environmental simulation chamber;

[0031] The flight data of the test aircraft in the environmental simulation chamber is recorded by a test recording module within a preset test time.

[0032] Optionally, before the atmospheric turbulence is formed by the atmospheric turbulence generating module, the method further includes:

[0033] Acquire temperature data of at least one location in the environmental simulation room;

[0034] The forming of atmospheric turbulence by the atmospheric turbulence generating module comprises:

[0035] According to the temperature data in the environmental simulation room, the heating temperature of the heating panel and the cooling temperature of the cooling panel are controlled to adjust the temperature difference between the heating temperature and the cooling temperature so that the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module is the test intensity.

[0036] Optionally, the test recording module records the flight data of the test aircraft in the environmental simulation chamber within a preset test time, including:

[0037] Within the preset test time, recording the position and attitude angle of the test aircraft when flying in the environmental simulation chamber through a test recording module;

[0038] After the test recording module records the flight data of the test aircraft in the environmental simulation chamber within a preset test time, the method further includes:

[0039] When the hovering time of the test aircraft reaches the preset test time, the test aircraft is controlled to land.

[0040] The present invention provides an atmospheric turbulence environment test device and method for an aircraft, the device comprises an environmental simulation chamber, an atmospheric turbulence generating module, a control module and a test recording module; the environmental simulation chamber is a closed space, the air in the closed space is heated and cooled by the atmospheric turbulence generating module, so that convection is formed between hot air and cold air to form atmospheric turbulence; the control module sends a control signal to the atmospheric turbulence generating module, and the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module can be controlled to be the test intensity, so that the test aircraft can perform atmospheric turbulence tests of various test intensities in the environmental simulation chamber, and the test recording module records the flight data of the test aircraft hovering at a preset height in the environmental simulation chamber, so that the various performances of the test aircraft can be tested under different atmospheric turbulence conditions. The present invention can establish an atmospheric turbulence environment test environment for the aircraft, and various performance indicators of the aircraft under different atmospheric turbulence conditions can be assessed and verified in the test chamber, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to the turbulence environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the structure of an atmospheric turbulence environment test device for an aircraft provided by an embodiment of the present invention;

[0042] Figure 2 A three-dimensional structural diagram of another atmospheric turbulence environment test device for an aircraft in an embodiment of the present invention;

[0043] Figure 3 A graph showing the change of atmospheric coherence length over time within an altitude range of 0 to 3000 m provided in an embodiment of the present invention;

[0044] Figure 4 A schematic diagram of the structure of a test recording module provided in an embodiment of the present invention;

[0045] Figure 5 The present invention provides a flowchart of an atmospheric turbulence environment test method for an aircraft in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0047] The embodiment of the present invention provides an atmospheric turbulence environment test device for an aircraft, Figure 1 A schematic diagram of the structure of an atmospheric turbulence environment test device for an aircraft provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the device includes an environment simulation chamber 10 , an atmospheric turbulence generating module 20 , a control module 30 and a test recording module 40 .

[0048] The environmental simulation chamber 10 is a closed space. The atmospheric turbulence generating module 20 is located in the environmental simulation chamber 10. The atmospheric turbulence generating module 20 is used to heat and cool the air in the environmental simulation chamber 10 to form atmospheric turbulence; the output end of the control module 30 is connected to the input end of the atmospheric turbulence generating module 20. The control module 30 is used to send a control signal to the atmospheric turbulence generating module 20 to control the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module 20 to be the test intensity; the test recording module 40 is arranged in the environmental simulation chamber 10. The test recording module 40 is used to record the flight data of the test aircraft hovering at a preset height of the environmental simulation chamber 10.

[0049] Among them, the environmental simulation chamber 10 is a closed space filled with air. In the environmental simulation chamber 10, a real atmospheric turbulence environment can be simulated, and multi-scale atmospheric turbulence environment tests of aircraft can be carried out to analyze whether the aircraft can maintain good quality characteristics after being subjected to multi-scale turbulent environmental conditions, and various performance indicators of the aircraft can be assessed and verified through corresponding laboratory comprehensive environmental tests. The air in a limited closed space is used as a fluid medium to artificially simulate the atmospheric turbulence in the laboratory, and the simulation of atmospheric turbulence can be achieved in the form of thermal convection. Using air as the fluid medium is the most direct and convenient. Since it is the same as the turbulent medium, the turbulence intensity can be increased by increasing the temperature gradient of the air in the environmental simulation chamber 10.

[0050] Specifically, the atmospheric turbulence generating module 20 is located in the environmental simulation chamber 10. The atmospheric turbulence generating module 20 can heat and cool the air in the environmental simulation chamber 10, so that there are differences in the air temperatures in different areas of the environmental simulation chamber 10, thereby forming heat convection between the air in different areas, and realizing the simulation of atmospheric turbulence. Exemplarily, the atmospheric turbulence generating module 20 can heat the air in the lower area of ​​the environmental simulation chamber 10, and cool the air in the upper area of ​​the environmental simulation chamber 10, so as to generate atmospheric turbulence between the upper and lower layers. The atmospheric turbulence generating module 20 is not limited to generating atmospheric turbulence between the upper and lower layers, and can also heat the air in one area of ​​the environmental simulation chamber 10, and cool the air in the opposite area of ​​the environmental simulation chamber 10, so as to form heat convection between the opposite sides of the environmental simulation chamber 10, and generate atmospheric turbulence. The prior art usually uses an off-site environment to conduct aircraft tests. The off-site environment is complex and uncontrolled. However, the embodiment of the present invention heats and cools the air in a closed space through an atmospheric turbulence generating module 20, and the simulated atmospheric turbulence has good stability. By controlling the heating temperature and the cooling temperature, the intensity of the atmospheric turbulence can be regulated to obtain different turbulence states, so that a test environment suitable for aircraft testing can be simulated in the environmental simulation room 10, and the influence of environmental factors can be avoided, so that the flight data obtained from the test can better reflect the actual flight performance of the aircraft, which is beneficial to improving the accuracy of the aircraft turbulence environment adaptability assessment and verification results.

[0051] The output end of the control module 30 is connected to the input end of the atmospheric turbulence generating module 20, and a control signal is sent to the atmospheric turbulence generating module 20 through the control module 30 to control the heating temperature and cooling temperature of the atmospheric turbulence generating module 20, thereby controlling the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module 20 to be the test intensity. After the atmospheric turbulence of the test intensity is generated in the environmental simulation chamber 10, the test aircraft is controlled to hover at a preset height of the environmental simulation chamber 10, and the flight data of the test aircraft hovering at the preset height of the environmental simulation chamber 10 is recorded by the test recording module 40, so that the atmospheric turbulence environment enhancement test of the aircraft can be realized.

[0052] In addition, the test recording module 40 can be connected to the control module 30 for communication, and the flight data of the test aircraft hovering at a preset height of the environmental simulation chamber 10 is sent to the control module 30, so that the control module 30 further analyzes the flight performance of the test aircraft. The atmospheric turbulence environment test device for aircraft according to the embodiment of the present invention fills the gap of the same type of devices in the prior art, and ensures the stability and controllability of the atmospheric turbulence intensity. The various performance indicators of the aircraft under different atmospheric turbulence conditions can be assessed and verified in the test room, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to turbulent environments.

[0053] Optionally, the test aircraft is a low-altitude aircraft, and the flight altitude of the low-altitude aircraft ranges from 0 to 3000m. The aircraft atmospheric turbulence environment test device can simulate the actual atmospheric state within the flight altitude range of the low-altitude aircraft, and can not only simulate the turbulence intensity of the actual atmosphere at the corresponding altitude, but also simulate the turbulence intensity far greater than the actual atmosphere, which is used to carry out the atmospheric turbulence environment enhancement test of the low-altitude aircraft.

[0054] The embodiment of the present invention provides an atmospheric turbulence environment test device for an aircraft, and the atmospheric turbulence environment test device for an aircraft includes an environmental simulation chamber, an atmospheric turbulence generation module, a control module, and a test recording module; the environmental simulation chamber is a closed space, and the air in the closed space is heated and cooled by the atmospheric turbulence generation module, so that convection is formed between hot air and cold air to form atmospheric turbulence; the control module sends a control signal to the atmospheric turbulence generation module, and the intensity of the atmospheric turbulence formed by the atmospheric turbulence generation module can be controlled to be the test intensity, so that the test aircraft can perform atmospheric turbulence tests of various test intensities in the environmental simulation chamber, and the test recording module records the flight data of the test aircraft hovering at a preset height in the environmental simulation chamber, so that the various performances of the test aircraft can be tested under different atmospheric turbulence conditions. The embodiment of the present invention establishes a turbulence environment test device for the aircraft, and ensures the stability and controllability of the atmospheric turbulence intensity, so that the various performance indicators of the aircraft under different atmospheric turbulence conditions can be assessed and verified in the test chamber, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to the turbulence environment.

[0055] The embodiment of the present invention provides another atmospheric turbulence environment test device for an aircraft, so as to further solve the problem of assessing and verifying the adaptability of an aircraft to a turbulent environment. Figure 2 FIG. 3 is a three-dimensional structural diagram of another atmospheric turbulence environment test device for an aircraft in an embodiment of the present invention. Figure 2 As shown, the atmospheric turbulence generating module 20 includes a heating panel 201 and a cooling panel 202 .

[0056] The heating panel 201 is located on the first inner surface of the environmental simulation chamber 10, and the cooling panel 202 is located on the second inner surface of the environmental simulation chamber 10. The first inner surface and the second inner surface are arranged opposite to each other; the air in the environmental simulation chamber 10 includes a bottom air layer, a middle air layer and a top air layer arranged in sequence.

[0057] The heating panel 201 is used to heat the bottom air layer of the environment simulation chamber 10; the cooling panel 202 is used to cool the top air layer of the environment simulation chamber 10; the bottom air layer, the middle air layer and the top air layer are used to form atmospheric turbulence.

[0058] Among them, the movement of fluid is mainly divided into laminar flow and turbulent flow, laminar flow belongs to regular movement, and turbulent flow belongs to irregular movement. Atmospheric turbulence is an irregular random movement in the atmosphere, and the physical properties such as pressure, speed, temperature, etc. at each point of turbulence fluctuate randomly. The occurrence of atmospheric turbulence requires certain dynamic and thermodynamic conditions: its dynamic condition is that there is obvious wind speed shear in the air layer; the thermodynamic condition is that the air layer must have a certain instability, among which the most favorable condition is that the upper air temperature is lower than the convection condition of the lower layer. In order to simulate atmospheric turbulence in the environmental simulation chamber 10, the air in the environmental simulation chamber 10 is divided into a bottom air layer, a middle air layer and a top air layer, and a temperature difference needs to be formed between the bottom air layer and the top air layer of the environmental simulation chamber 10, so that thermal convection occurs between the bottom air layer and the top air layer to simulate atmospheric turbulence.

[0059] Specifically, the heating panel 201 is located on the first inner surface of the environmental simulation chamber 10, and the cooling panel 202 is located on the second inner surface of the environmental simulation chamber 10. The first inner surface and the second inner surface are arranged relative to each other. For example, the first inner surface is the bottom surface of the environmental simulation chamber 10, and the bottom surface of the environmental simulation chamber 10 is in contact with the bottom air layer. The second inner surface is the top surface of the environmental simulation chamber 10, and the top surface of the environmental simulation chamber 10 is in contact with the top air layer. That is, the heating panel 201 is arranged in the bottom air layer of the environmental simulation chamber 10 to heat the bottom air layer of the environmental simulation chamber 10, and the cooling panel 202 cools the top air layer of the environmental simulation chamber 10, so that atmospheric turbulence is formed in the bottom air layer, the middle air layer and the top air layer. The simulated atmospheric turbulence has good stability and can be regulated to obtain different turbulence states. For example, the turbulence intensity can be increased by controlling the temperature gradient of the air in the device.

[0060] For further information, please refer to Figure 2 The atmospheric turbulence environment test device for the aircraft also includes at least one temperature detection module 50; the temperature detection module 50 is located in the environmental simulation chamber 10, and the output end of the temperature detection module 50 is connected to the input end of the control module 30. The temperature detection module 50 is used to detect the temperature data of at least one position in the environmental simulation chamber 10 and send the temperature data to the control module 30.

[0061] The control module 30 is specifically used to control the heating temperature of the heating panel 201 and the cooling temperature of the cooling panel 202 according to the temperature data, so as to adjust the temperature difference ΔT between the heating temperature and the cooling temperature, and control the intensity r0 of the atmospheric turbulence formed by the heating panel 201 and the cooling panel 202. The intensity r0 of the atmospheric turbulence satisfies:

[0062] r0=48(ΔT) -0.81 .

[0063] Among them, at least one temperature detection module 50 in the atmospheric turbulence environment test device of the aircraft can be set at a suitable position in the environmental simulation chamber 10 as needed to monitor the temperature in the environmental simulation chamber 10. Exemplarily, only one temperature detection module 50 can be set at the bottom layer of the environmental simulation chamber 10 to monitor the temperature of the bottom air layer of the environmental simulation chamber 10, and the intensity of the atmospheric turbulence formed can be controlled by increasing the temperature of the bottom air layer; only two temperature detection modules 50 can be set, one is set at the bottom layer of the environmental simulation chamber 10, and the other is set at the top layer of the environmental simulation chamber 10, so as to monitor the temperature difference between the bottom air layer and the top air layer of the environmental simulation chamber 10, so as to regulate the temperature difference ΔT between the heating temperature and the cooling temperature; when multiple temperature detection modules 50 are set, the temperature of each position in the environmental simulation chamber 10 can be monitored, and the turbulence intensity can be increased by controlling the temperature gradient of the air in the device.

[0064] Specifically, the intensity of the simulated atmospheric turbulence is related to the temperature difference between the heating panel 201 and the cooling panel 202. By adjusting the temperatures of the two panels respectively by the control module 30, atmospheric turbulence of different intensities can be simulated. Usually, the atmospheric turbulence intensity is generally expressed by the atmospheric coherence length, that is, the atmospheric coherence length is also the atmospheric turbulence intensity r0. The greater the atmospheric turbulence intensity r0, the better the atmospheric conditions. The expression is:

[0065]

[0066] Where κ is the wave number. For a plane wave, the wavelength λ is usually 530 nm, and the wave number κ = 1 / λ. L is the optical path length. is the average refractive index structure constant, which has the following relationship with temperature fluctuation:

[0067]

[0068] Where M is the rate of change of refractive index with temperature, which is generally 10 -6 / ℃, L0 is the outer scale of atmospheric turbulence, is the temperature fluctuation variance. Calculating the outer scale and temperature fluctuation variance of atmospheric turbulence requires high-resolution atmospheric temperature and wind speed data, and the calculation process is relatively complicated. In order to conveniently obtain the intensity of atmospheric turbulence in the device, the embodiment of the present invention directly uses the fitting equation between the temperature difference ΔT and the atmospheric turbulence intensity r0:

[0069] r0=48(ΔT) -0.81 ;

[0070] The fitting equation reflects the numerical relationship between turbulence intensity and temperature difference, which facilitates us to conduct atmospheric turbulence environment tests for low-altitude aircraft.

[0071] Figure 3The graph of the atmospheric coherence length over time in the range of 0 to 3000 m provided in the embodiment of the present invention is as follows: Figure 3 As shown, the horizontal axis represents time, the left vertical axis represents altitude, different colors represent different atmospheric coherence lengths, and the atmospheric coherence lengths at different times and altitudes are different, and the atmospheric coherence length is related to altitude and time. Since the flight altitude of most low-altitude aircraft is within the range of 0 to 3000m, the atmospheric turbulence environment test device needs to simulate the real atmospheric turbulence intensity within the range of 0 to 3000m. The figure shows that the atmospheric coherence length within the range of 0 to 3000m varies in the range of 5 to 25cm. From the relationship between the temperature difference ΔT and the atmospheric turbulence intensity r0, it can be seen that the temperature difference between the upper and lower layers of air can at least vary within the range of 2 to 16°C. The control module 30 controls the heating temperature of the heating panel 201 and the cooling temperature of the cooling panel 202 according to the temperature data to adjust the temperature difference ΔT between the heating temperature and the cooling temperature, and controls the intensity r0 of the atmospheric turbulence formed by the heating panel 201 and the cooling panel 202, so as to carry out turbulence environment tests on the aircraft, and various performance indicators of the aircraft can be evaluated and verified in the test room. In addition, the use of a heating panel 201 and a cooling panel 202 with adjustable temperatures to simulate atmospheric turbulence ensures the stability of the atmospheric turbulence intensity and the controllability of the atmospheric turbulence. The atmospheric turbulence environment test device for an aircraft provided by an embodiment of the present invention can assess and verify various performance indicators of an aircraft A under different atmospheric turbulence conditions in an environmental simulation chamber 10, which is conducive to solving the problem of assessing and verifying the adaptability of a low-altitude aircraft to a turbulent environment.

[0072] The atmospheric turbulence environment test device for aircraft provided in the embodiment of the present invention is targeted at the actual atmospheric conditions within the flight altitude range (0 to 3000m) of low-altitude aircraft. It can not only simulate the turbulence intensity of the actual atmosphere at the corresponding altitude, but also simulate a turbulence intensity far greater than the actual atmosphere, and is used to carry out atmospheric turbulence environment enhancement tests for low-altitude aircraft.

[0073] For further information, please refer to Figure 2 , the shape of the environmental simulation chamber 10 includes a cuboid or a cube;

[0074] The atmospheric turbulence environment test device for an aircraft includes a plurality of temperature detection modules 50 , and the temperature detection modules 50 are arranged at the vertices of the environment simulation chamber 10 ; the temperature detection modules 50 are arranged in a one-to-one correspondence with the vertices of the environment simulation chamber 10 .

[0075] Specifically, through the multiple temperature detection modules 50, the temperature of the bottom layer and the upper layer of the atmosphere inside the environment simulation chamber 10 can be observed in real time, and the intensity of the atmospheric turbulence can be calculated by the temperature difference, thereby ensuring the accuracy of the turbulence intensity.

[0076] Optionally, the location of the temperature detection module 50 is not limited to being set at the top position of the environmental simulation chamber 10, but can also be set at different heights along the environmental simulation chamber 10 to monitor the temperature at different heights, thereby controlling the atmospheric turbulence intensity by controlling the temperature gradient of the air in the environmental simulation chamber 10.

[0077] For further information, please refer to Figure 2 The atmospheric turbulence environment test device for the aircraft also includes a protective net 60 and an aircraft landing platform 70; the protective net 60 is located at a preset position in the environmental simulation chamber 10, the aircraft landing platform 70 is located on the bottom surface of the environmental simulation chamber 10, and the aircraft landing platform 70 is used to carry the test aircraft.

[0078] Specifically, the preset position may be the side and bottom of the environment simulation chamber 10, and a protective net 60 may be provided at the preset position in the environment simulation chamber 10 to prevent the aircraft from losing control and causing damage during the test. The aircraft take-off and landing platform 70 is used to carry the test aircraft A so that the test aircraft A can take off and land on the aircraft take-off and landing platform 70.

[0079] For further information, please refer to Figure 2 The atmospheric turbulence environment test device for an aircraft further includes an observation window 80 and an inlet and outlet passage 90 ; the observation window 80 and the inlet and outlet passage 90 are both located on any side of the environment simulation chamber 10 .

[0080] Specifically, an observation window 8 and an inlet and outlet passage 90 are installed on the side of the environmental simulation chamber 10, which can observe and record the test conditions of the specimen in real time. The inlet and outlet passage 90 facilitates the transportation, installation, maintenance and inspection of personnel and equipment.

[0081] Furthermore, Figure 4 Schematic diagram of the structure of the test recording module provided in an embodiment of the present invention. Figure 4 As shown, the test recording module 40 includes a position detection unit 401 and an attitude angle detection unit 402 ; the output end of the position detection unit 401 is connected to the first detection input end of the control module 30 , and the output end of the attitude angle detection unit 402 is connected to the second detection input end of the control module 30 .

[0082] The position detection unit 401 is used to detect the position of the test aircraft when flying in the environmental simulation room, and send it to the control module 30; the attitude angle detection unit 402 is used to detect the attitude angle of the test aircraft when flying in the environmental simulation room, and send it to the control module 30; the control module 30 is also used to determine the flight performance of the test aircraft based on the position and attitude angle.

[0083] Specifically, the position detection unit 401 detects the position of the test aircraft when flying in the environmental simulation room, the attitude angle detection unit 402 detects the attitude angle of the test aircraft when flying in the environmental simulation room, and the control module 30 analyzes the flight performance of the test aircraft based on the position and attitude angle data. The embodiment of the present invention establishes a turbulent environment test device for the aircraft and ensures the stability and controllability of the atmospheric turbulence intensity. The control module 30 can analyze whether the aircraft can maintain good quality characteristics after being subjected to atmospheric turbulence environmental conditions of different scales, and solve the problem of assessing and verifying the adaptability of low-altitude aircraft to turbulent environments.

[0084] In an embodiment of the present invention, the steps of carrying out the atmospheric turbulence environment test of a low-altitude aircraft are as follows:

[0085] 1. Test preparation: a) Before the test, check whether the protection function of the protection net 60 is normal. If the net is broken or disconnected, repair it in time. b) Check the GPS signal of the aircraft. If the GPS signal is weak, the test needs to be interrupted.

[0086] 2. Test procedures:

[0087] a) Check the appearance quality of the aircraft and record the defects. b) Test and record the ambient temperature and relative humidity. c) Place the aircraft in the center of the aircraft landing platform 70. d) Set the atmospheric turbulence intensity required for the test on the control module 30. e) Start the test equipment, adjust the temperature of the heating panel 201 and the cooling panel 202, and control the temperature difference between the upper and lower air layers to simulate the atmospheric turbulence intensity required for the test. f) Start the aircraft, make it leave the aircraft landing platform 70, fly to the center of the environmental simulation room 10, and hover at a height of 1 to 2 meters above the ground. g) The hovering time is 5 minutes, and the position and attitude angle of the test sample are recorded in real time using the test recording module 40. h) After the hovering time reaches 5 minutes, the aircraft is landed on the landing platform. i) Repeat the above steps f to h 3 times. j) Record and save the test data. k) If the aircraft loses control during the test, record and interrupt the test.

[0088] An embodiment of the present invention provides an atmospheric turbulence environment test device for an aircraft. By establishing a turbulence environment test device for an aircraft and ensuring the stability and controllability of the atmospheric turbulence intensity, various performance indicators of the aircraft under different atmospheric turbulence conditions can be assessed and verified in the test room, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to turbulent environments.

[0089] The embodiment of the present invention also provides an atmospheric turbulence environment test method for an aircraft, Figure 5FIG. 1 is a flow chart of an atmospheric turbulence environment test method for an aircraft provided in an embodiment of the present invention. The atmospheric turbulence environment test method for an aircraft tests an aircraft according to an atmospheric turbulence environment test device for an aircraft in any embodiment of the present invention, such as Figure 5 As shown in the figure, the atmospheric turbulence environment test method for aircraft includes:

[0090] S110. Atmospheric turbulence is generated by an atmospheric turbulence generating module, and the intensity of the atmospheric turbulence is a test intensity.

[0091] Specifically, before starting the test aircraft, atmospheric turbulence is first formed in the environmental simulation chamber 10 through the atmospheric turbulence generating module 20. The intensity of the atmospheric turbulence is the test intensity, so as to verify the performance of the test aircraft under the atmospheric turbulence of the test intensity, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to turbulent environments.

[0092] S120: Start the test aircraft and control the test aircraft to hover at a preset height in the environmental simulation room.

[0093] Specifically, after the environmental simulation chamber 10 is controlled to form atmospheric turbulence of test intensity, the test aircraft is started and controlled to hover at a preset height of the environmental simulation chamber 10. The preset height can be adjusted according to the height of the environmental simulation chamber 10. For example, the preset height is 1-2 meters. At the preset height, the test personnel can observe the flight attitude of the test aircraft more directly to ensure the safety of the test aircraft during the test.

[0094] Optionally, the test aircraft may be controlled to hover at a preset height in the center of the environmental simulation chamber 10 .

[0095] S130. Record the flight data of the test aircraft in the environmental simulation room within a preset test time through a test recording module.

[0096] Specifically, during the hovering of the test aircraft at the preset height of the environmental simulation chamber 10, the flight data of the test aircraft in the environmental simulation chamber is recorded by the test recording module 40 within the preset test time. The hovering time of the test aircraft at the preset height of the environmental simulation chamber 10 is equal to the preset test time. The preset test time can be 5 minutes, and the hovering time of the test aircraft at the preset height of the environmental simulation chamber 10 is also 5 minutes. In addition, steps S120 and S130 can be repeated to collect more flight data of the test aircraft to make the performance analysis of the test aircraft more accurate. The atmospheric turbulence environment test method of the aircraft of the embodiment of the present invention utilizes the atmospheric turbulence environment test device of the aircraft. The atmospheric turbulence environment test device of the aircraft ensures the stability and controllability of the atmospheric turbulence intensity, so that the atmospheric turbulence environment test method of the aircraft can assess and verify the various performance indicators of the aircraft under different atmospheric turbulence conditions in the test room, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to the turbulent environment.

[0097] The embodiment of the present invention provides an atmospheric turbulence environment test method for an aircraft, wherein atmospheric turbulence is formed by an atmospheric turbulence generating module, and the intensity of the atmospheric turbulence is the test intensity; the test aircraft is started, and the test aircraft is controlled to hover at a preset height in an environmental simulation room, so that the test aircraft can perform atmospheric turbulence tests of various test intensities in the environmental simulation room, and the flight data of the test aircraft in the environmental simulation room is recorded by a test recording module within a preset test time, so that the various performances of the test aircraft can be tested under different atmospheric turbulence conditions. The embodiment of the present invention can assess and verify the various performance indicators of the aircraft under different atmospheric turbulence conditions in the test room, which is conducive to solving the problem of assessing and verifying the adaptability of low-altitude aircraft to turbulent environments.

[0098] Optionally, before the atmospheric turbulence is formed by the atmospheric turbulence generating module, the method further includes: acquiring temperature data of at least one position in the environmental simulation room.

[0099] Specifically, by acquiring temperature data of at least one position in the environmental simulation chamber 10, the temperature difference between the heating temperature and the cooling temperature is regulated according to the temperature data in the environmental simulation chamber, so that the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module is the test intensity.

[0100] Optionally, atmospheric turbulence is formed by an atmospheric turbulence generating module, including: controlling the heating temperature of the heating panel and the cooling temperature of the cooling panel according to the temperature data in the environmental simulation room, so as to regulate the temperature difference between the heating temperature and the cooling temperature, so that the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module is the test intensity.

[0101] The control module 30 is specifically used to control the heating temperature of the heating panel 201 and the cooling temperature of the cooling panel 202 according to the temperature data, so as to adjust the temperature difference ΔT between the heating temperature and the cooling temperature, and control the intensity r0 of the atmospheric turbulence formed by the heating panel 201 and the cooling panel 202. The intensity r0 of the atmospheric turbulence satisfies:

[0102] r0=48(ΔT) -0.81 .

[0103] Optionally, the test recording module records the flight data of the test aircraft in the environmental simulation chamber within a preset test time, including:

[0104] During the preset test time, the test recording module records the position and attitude angle of the test aircraft when flying in the environmental simulation room.

[0105] Specifically, within the preset test time, the test recording module 40 records the position and attitude angle of the test aircraft when flying in the environmental simulation chamber 10, and the position and attitude angle of the test aircraft when flying in the environmental simulation chamber 10 can reflect the flight performance of the test aircraft.

[0106] After recording the flight data of the test aircraft in the environmental simulation room within the preset test time through the test recording module, it also includes:

[0107] When the hovering time of the test aircraft reaches the preset test time, the test aircraft is controlled to land.

[0108] Specifically, the preset test time is also the hovering time of the test aircraft. When the hovering time of the test aircraft reaches the preset test time, the test aircraft is controlled to land. After the test aircraft lands, steps S120 and S130 may be repeated multiple times to collect more flight data of the test aircraft, so as to make the performance analysis of the test aircraft more accurate. If the aircraft loses control during the test, the loss of control is recorded and the test is interrupted to ensure the safety of the test process.

[0109] In the embodiment of the present invention, since the atmospheric turbulence environment test device of the aircraft is used to establish the atmospheric turbulence environment, the aircraft is avoided from being tested outdoors, the test cycle of the aircraft can be shortened, the test efficiency can be improved, and the test cost can be greatly reduced.

[0110] In addition, the atmospheric turbulence environment test method for an aircraft in an embodiment of the present invention includes but is not limited to the above processes. The atmospheric turbulence environment test method for an aircraft in an embodiment of the present invention can adaptively set the relevant processes according to the functions of the atmospheric turbulence environment test device for an aircraft in any embodiment of the present invention, so as to achieve the function and technical effect of the atmospheric turbulence environment test device for an aircraft in any embodiment of the present invention.

[0111] An embodiment of the present invention provides an atmospheric turbulence environment test method for an aircraft, which can assess and verify various performance indicators of the aircraft under different atmospheric turbulence conditions in a test room, which is helpful for solving the problem of assessing and verifying the adaptability of low-altitude aircraft to turbulent environments.

[0112] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An atmospheric turbulence environment test device for an aircraft, characterized in that: The device comprises an environment simulation chamber, an atmospheric turbulence generating module, a control module and a test recording module; The environment simulation chamber is a closed space, the atmospheric turbulence generating module is located in the environment simulation chamber, and the atmospheric turbulence generating module is used to heat and cool the air in the environment simulation chamber to form atmospheric turbulence; The output end of the control module is connected to the input end of the atmospheric turbulence generating module, and the control module is used to send a control signal to the atmospheric turbulence generating module to control the intensity of the atmospheric turbulence generated by the atmospheric turbulence generating module to be the test intensity; The test recording module is arranged in the environmental simulation chamber, and is used to record the flight data of the test aircraft hovering at a preset height in the environmental simulation chamber.

2. The atmospheric turbulence environment test device for aircraft according to claim 1, characterized in that: The atmospheric turbulence generating module includes a heating panel and a cooling panel; The heating panel is located on the first inner surface of the environmental simulation chamber, the cooling panel is located on the second inner surface of the environmental simulation chamber, and the first inner surface and the second inner surface are arranged opposite to each other; the air in the environmental simulation chamber includes a bottom air layer, a middle air layer and a top air layer arranged in sequence; The heating panel is used to heat the bottom air layer of the environmental simulation chamber; the cooling panel is used to cool the top air layer of the environmental simulation chamber; The bottom air layer, the middle air layer and the top air layer are used to form atmospheric turbulence.

3. The atmospheric turbulence environment test device for aircraft according to claim 2, characterized in that: Also includes at least one temperature detection module; The temperature detection module is located in the environmental simulation room, the output end of the temperature detection module is connected to the input end of the control module, and the temperature detection module is used to detect the temperature data of at least one position in the environmental simulation room and send the temperature data to the control module; The control module is specifically used to control the heating temperature of the heating panel and the cooling temperature of the cooling panel according to the temperature data, so as to adjust the temperature difference ΔT between the heating temperature and the cooling temperature, and control the intensity r0 of the atmospheric turbulence jointly formed by the heating panel and the cooling panel, wherein the intensity r0 of the atmospheric turbulence satisfies: r0=48(ΔT) -0.81 。 4. The atmospheric turbulence environment test device for aircraft according to claim 3, characterized in that: The shape of the environmental simulation chamber includes a cuboid or a cube; The atmospheric turbulence environment test device for the aircraft comprises a plurality of the temperature detection modules, and the temperature detection modules are arranged at the apex position of the environmental simulation chamber; The temperature detection modules are arranged in one-to-one correspondence with the vertex positions of the environmental simulation chamber.

5. The atmospheric turbulence environment test device for aircraft according to claim 1, characterized in that: The atmospheric turbulence environment test device for the aircraft also includes a protection net and an aircraft take-off and landing platform; The protection net is located at a preset position in the environmental simulation room, the aircraft landing platform is located on the bottom surface of the environmental simulation room, and the aircraft landing platform is used to carry the test aircraft.

6. The atmospheric turbulence environment test device for aircraft according to claim 1, characterized in that: It also includes observation windows and entry and exit passages; The observation window and the inlet and outlet passages are located on any side of the environmental simulation chamber.

7. The atmospheric turbulence environment test device for aircraft according to claim 1, characterized in that: The test recording module includes a position detection unit and an attitude angle detection unit; The output end of the position detection unit is connected to the first detection input end of the control module, and the output end of the attitude angle detection unit is connected to the second detection input end of the control module; The position detection unit is used to detect the position of the test aircraft when flying in the environmental simulation chamber, and send it to the control module; the attitude angle detection unit is used to detect the attitude angle of the test aircraft when flying in the environmental simulation chamber, and send it to the control module; the control module is also used to determine the flight performance of the test aircraft based on the position and the attitude angle.

8. An atmospheric turbulence environment test method for an aircraft, characterized in that: The atmospheric turbulence environment test method for an aircraft is to test an aircraft using the atmospheric turbulence environment test device for an aircraft according to any one of claims 1 to 7, and the atmospheric turbulence environment test method for an aircraft comprises: Generating atmospheric turbulence by an atmospheric turbulence generating module, wherein the intensity of the atmospheric turbulence is a test intensity; Starting the test aircraft and controlling the test aircraft to hover at a preset height of the environmental simulation chamber; The flight data of the test aircraft in the environmental simulation chamber is recorded by a test recording module within a preset test time.

9. The atmospheric turbulence environment test method for an aircraft according to claim 8, characterized in that: Before the atmospheric turbulence is formed by the atmospheric turbulence generating module, the method further comprises: Acquire temperature data of at least one location in the environmental simulation room; The forming of atmospheric turbulence by the atmospheric turbulence generating module comprises: According to the temperature data in the environmental simulation room, the heating temperature of the heating panel and the cooling temperature of the cooling panel are controlled to adjust the temperature difference between the heating temperature and the cooling temperature so that the intensity of the atmospheric turbulence formed by the atmospheric turbulence generating module is the test intensity.

10. The atmospheric turbulence environment test method for an aircraft according to claim 8, characterized in that: The test recording module records the flight data of the test aircraft in the environmental simulation chamber within a preset test time, including: Within the preset test time, recording the position and attitude angle of the test aircraft when flying in the environmental simulation chamber through a test recording module; After the test recording module records the flight data of the test aircraft in the environmental simulation chamber within a preset test time, the method further includes: When the hovering time of the test aircraft reaches the preset test time, the test aircraft is controlled to land.

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