Aircraft defrosting vehicle gas injection control method and system

Abstract

The invention discloses an aircraft defrosting vehicle gas injection control method and system, and belongs to the technical field of aircraft defrosting equipment.The aircraft defrosting vehicle gas injection control method comprises the steps that frost layer data of the surface of an aircraft and a frost layer bottom moisture distribution diagram are obtained, an aircraft surface defrosting demand index is generated, and the defrosting mode of the frost layer of the surface of the aircraft is judged; the aircraft surface inclination angle, the environment wind speed, the environment wind angle, the aircraft surface temperature and the frost layer temperature are obtained, a spraying angle adjustment value is generated, and the spraying angle of a nozzle of the defrosting vehicle is adjusted; the dynamic defrosting demand index is generated through the frost layer thickness, position distribution and the bottom moisture state, the nozzle angle is adjusted in real time through the injection angle analysis model in combination with parameters such as the environment wind speed and the aircraft inclination angle, it is ensured that airflow uniformly covers different areas, local excessive or insufficient treatment is avoided, and the effect of improving the defrosting efficiency is achieved. And multi-dimensional data are fused and dynamically regulated and controlled, so that the defrosting efficiency, uniformity and environmental adaptability are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft defrosting equipment, and particularly relates to a gas injection control method and system for an aircraft defrosting vehicle. Background Art

[0002] An aircraft defrosting vehicle is an important equipment to ensure aviation safety. It removes the frost layer on the aircraft surface through gas injection to prevent the impact of icing on flight performance. Gas injection control, as the core link, directly affects the defrosting efficiency and coverage effect.

[0003] Currently, most aircraft defrosting vehicles adopt fixed-angle injection or simple regulation methods based on a single sensor (such as a temperature sensor). For example, some systems adjust the injection pressure by measuring the frost layer thickness, or adopt parallel or vertical injection modes in specific areas. However, these methods cannot adapt to the differences in frost layer thickness and distribution, resulting in uneven injection coverage and affecting the accuracy of the defrosting strategy. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a gas injection control method and system for an aircraft defrosting vehicle, which solves the above problems.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A gas injection control method for an aircraft defrosting vehicle includes the following steps:

[0006] Obtain the frost layer data and the moisture distribution map at the bottom of the frost layer on the aircraft surface; wherein, the frost layer data includes the frost layer thickness and the frost layer position distribution map; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer;

[0007] Generate a defrosting demand index for the aircraft surface according to the frost layer thickness and the frost layer position distribution map;

[0008] Judge the defrosting method for the frost layer on the aircraft surface according to the defrosting demand index for the aircraft surface; wherein, the defrosting methods include near-parallel injection and near-vertical injection;

[0009] Based on the defrosting method for the frost layer on the aircraft surface, obtain the aircraft surface tilt angle, ambient wind speed, ambient wind angle, aircraft surface temperature, and frost layer temperature, establish a spray angle analysis model, and generate a spray angle adjustment value;

[0010] Adjust the spray angle of the defrosting vehicle nozzle according to the spray angle adjustment value.

[0011] On the basis of the above technical solution, the present invention also provides the following optional technical solutions:

[0012] Further technical solution: The generating of the defrosting demand index for the aircraft surface according to the frost layer thickness and the frost layer position distribution map specifically includes:

[0013] Generate a frost layer thickness status index according to the frost layer thickness; wherein, the frost layer thickness status index refers to the ratio between the frost layer thickness and the frost layer thickness threshold; the frost layer thickness threshold refers to the demarcation value of the frost layer thickness at which the defrosting method needs to be changed.

[0014] Generate a frost layer position distribution index according to the frost layer position distribution map.

[0015] Generate a frost layer bottom moisture status index according to the frost layer bottom moisture area.

[0016] Establish a defrosting demand analysis model according to the frost layer thickness status index, the frost layer position distribution index and the frost layer bottom moisture distribution index, and generate an aircraft surface defrosting demand index.

[0017] Further technical solution: The specific generation method of the frost layer position distribution index is as follows:

[0018] Generate the total frost layer area according to the frost layer position distribution map.

[0019] Generate a frost layer position distribution index according to the total frost layer area and the total area of the corresponding aircraft surface defrosting area; the frost layer position distribution index refers to the ratio between the total frost layer area and the total area of the corresponding aircraft surface defrosting area.

[0020] Further technical solution: The specific generation method of the frost layer bottom moisture status index is as follows:

[0021] Generate an area ratio according to the frost layer bottom moisture area and the total frost layer area; the area ratio refers to the ratio between the frost layer bottom moisture area and the total frost layer area.

[0022] Generate a ratio difference according to the area ratio and the ratio threshold; the ratio difference refers to the difference between the area ratio and the ratio threshold; the ratio threshold refers to the minimum value of the moisture ratio that can reduce the friction between the frost layer and the aircraft surface.

[0023] Generate a frost layer bottom moisture status index according to the ratio difference and the ratio threshold; the frost layer bottom moisture status index refers to the ratio between the ratio difference and the ratio threshold.

[0024] Further technical solution: The expression of the defrosting demand analysis model is:

[0025]

[0026] In the expression, K represents the aircraft surface defrosting demand index, H speed represents the frost layer thickness status index, M area represents the frost layer position distribution index, δ represents the frost layer bottom moisture distribution index, α and β are both weight coefficients, and α + β = 1.

[0027] Further technical solution: The specific method for generating the injection angle adjustment value includes:

[0028] Obtain the inclination angle of the aircraft surface, and generate an inclination angle influence coefficient according to the inclination angle of the aircraft surface; wherein, the inclination angle influence coefficient refers to the ratio of the difference between the inclination angle of the aircraft surface and the critical inclination angle value to the critical inclination angle value;

[0029] Obtain the ambient wind speed, and generate an ambient wind speed influence index; wherein, the ambient wind speed influence index refers to the ratio of the difference between the ambient wind speed and the gas movement speed of the gas ejected by the defrosting vehicle to the gas movement speed of the gas ejected by the defrosting vehicle;

[0030] Obtain the ambient wind angle, and generate an ambient wind angle factor; wherein, the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the injection angle of the defrosting vehicle to the angle threshold;

[0031] Obtain the aircraft surface temperature and the frost layer temperature, and generate a temperature difference influence factor; the temperature difference influence factor refers to the ratio of the difference between the aircraft surface temperature and the frost layer temperature to the temperature difference threshold;

[0032] Establish an injection angle analysis model, and substitute the current injection angle, the inclination angle influence coefficient, the ambient wind speed influence index, the ambient wind angle factor, and the temperature difference influence factor into the injection angle analysis model to generate an injection angle adjustment value.

[0033] Further technical solution: The expression of the injection angle analysis model is:

[0034] Δθ=θ0*{(1+θ air )*a1+F envi *(1+θ envi )*a2+(1-T diff )*a3}-θ jet ;

[0035] In the expression, Δθ represents the injection angle adjustment value, θ0 represents the theoretical injection angle, θ air represents the inclination angle influence coefficient, F envi represents the ambient wind speed influence index, θ envi represents the ambient wind angle factor, T diff represents the temperature difference influence factor, and a1, a2, and a3 are all model parameters, and a1 + a2 + a3 = 1.

[0036] An aircraft defrosting vehicle gas injection control system, the system includes:

[0037] The frost layer data acquisition module is used to acquire the frost layer data on the aircraft surface and the moisture distribution map at the bottom of the frost layer; among them, the frost layer data includes the frost layer thickness and the frost layer position distribution map; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer.

[0038] The requirement analysis unit is used to generate the defrosting requirement index of the aircraft surface according to the frost layer thickness and the frost layer position distribution map.

[0039] The mode judgment module is used to judge the defrosting method of the frost layer on the aircraft surface according to the defrosting requirement index of the aircraft surface; among them, the defrosting methods include near-parallel spraying and near-vertical spraying.

[0040] The angle adjustment analysis unit, based on the defrosting method of the frost layer on the aircraft surface, is used to obtain the tilt angle of the aircraft surface, the ambient wind speed, the ambient wind angle, the aircraft surface temperature and the frost layer temperature, establish a spraying angle analysis model, and generate a spraying angle adjustment value.

[0041] The adjustment control module is used to adjust the spraying angle of the defrosting vehicle nozzle according to the spraying angle adjustment value.

[0042] Further technical solution: The requirement analysis unit specifically includes:

[0043] The frost layer thickness analysis module is used to generate a frost layer thickness status index according to the frost layer thickness; among them, the frost layer thickness status index refers to the ratio between the frost layer thickness and the frost layer thickness threshold; the frost layer thickness threshold refers to the frost layer thickness demarcation value at which the defrosting method needs to be changed.

[0044] The frost layer position analysis module is used to generate a frost layer position distribution index according to the frost layer position distribution map.

[0045] The frost layer bottom moisture analysis module is used to generate a frost layer bottom moisture status index according to the frost layer bottom moisture area; the frost layer bottom moisture status index refers to the ratio of the difference between the frost layer bottom moisture area and the total frost layer area to the total frost layer area.

[0046] The requirement index generation module is used to establish a defrosting requirement analysis model according to the frost layer thickness status index, the frost layer position distribution index and the frost layer bottom moisture distribution index, and generate the defrosting requirement index of the aircraft surface.

[0047] Further technical solution: The angle adjustment analysis unit specifically includes:

[0048] The tilt angle analysis module is used to obtain the tilt angle of the aircraft surface and generate a tilt angle influence coefficient according to the tilt angle of the aircraft surface; among them, the tilt angle influence coefficient refers to the ratio of the difference between the tilt angle of the aircraft surface and the tilt angle critical value to the tilt angle critical value.

[0049] The wind speed impact analysis module is used to obtain the ambient wind speed and generate an ambient wind speed impact index; wherein, the ambient wind speed impact index refers to the ratio of the difference between the ambient wind speed and the gas movement speed of the gas ejected by the defrosting vehicle to the gas movement speed of the gas ejected by the defrosting vehicle.

[0050] The ambient wind angle analysis module is used to obtain the ambient wind angle and generate an ambient wind angle factor; wherein, the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the ejection angle of the defrosting vehicle to the angle threshold.

[0051] The temperature difference analysis module is used to obtain the aircraft surface temperature and the frost layer temperature and generate a temperature difference impact factor; the temperature difference impact factor refers to the ratio of the difference between the aircraft surface temperature and the frost layer temperature to the temperature difference threshold.

[0052] The ejection angle adjustment value generation module is used to establish an ejection angle analysis model, substitute the current ejection angle, tilt angle impact coefficient, ambient wind speed impact index, ambient wind angle factor and temperature difference impact factor into the ejection angle analysis model, and generate an ejection angle adjustment value.

[0053] The present invention provides an aircraft defrosting vehicle gas ejection control method and system, which has the following beneficial effects compared with the prior art:

[0054] The present invention generates a dynamic defrosting demand index through the frost layer thickness, position distribution and bottom moisture state, combines parameters such as the ambient wind speed and the aircraft tilt angle, and adjusts the nozzle angle in real time through the ejection angle analysis model to ensure that the air flow evenly covers different areas, avoiding local over-treatment or under-treatment. It also combines parameters such as the ambient wind speed, the aircraft tilt angle, and the frost layer bottom moisture state index for multi-dimensional data fusion and dynamic regulation, significantly improving the defrosting efficiency, uniformity and environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a flow chart of an aircraft defrosting vehicle gas ejection control method provided by an embodiment of the present invention.

[0056] Figure 2 It is a schematic structural diagram of an aircraft defrosting vehicle gas ejection control system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0057] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0059] Please refer to Figure 1 , a gas injection control method for an aircraft defrosting vehicle provided by an embodiment of the present invention, comprising the following steps:

[0060] Step 1: Obtain the frost layer data and the moisture distribution map at the bottom of the frost layer on the aircraft surface; wherein, the frost layer data includes the frost layer thickness and the frost layer position distribution map; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer;

[0061] Step 2: Generate a defrosting demand index for the aircraft surface according to the frost layer thickness and the frost layer position distribution map;

[0062] Step 3: Determine the defrosting method for the frost layer on the aircraft surface according to the defrosting demand index for the aircraft surface; wherein, the defrosting methods include near-parallel injection and near-vertical injection;

[0063] Step 4: Based on the defrosting method for the frost layer on the aircraft surface, obtain the aircraft surface tilt angle, the ambient wind speed, the ambient wind angle, the aircraft surface temperature, and the frost layer temperature, establish a spray angle analysis model, and generate a spray angle adjustment value;

[0064] Step 5: Adjust the spray angle of the defrosting vehicle nozzle according to the spray angle adjustment value.

[0065] As a preferred embodiment of the present invention, the specific steps of the second step include the following steps:

[0066] S10: Generate a frost layer thickness state index according to the frost layer thickness; wherein, the frost layer thickness state index refers to the ratio between the frost layer thickness and the frost layer thickness threshold; the frost layer thickness threshold refers to the frost layer thickness boundary value at which the defrosting method needs to be changed;

[0067] It should be explained that, in the case of different frost layer thicknesses, the theoretical spray angles of the defrosting vehicle are also different; for example, when the frost layer thickness is 1-2 mm, the spray angle can be relatively small, and a more concentrated spraying method can effectively remove the frost layer. The thin frost layer is easy to be removed and does not require much time; when the frost layer thickness is 3-5 mm, the spray angle needs to be slightly adjusted, and a medium spray angle may be adopted to ensure that the liquid covers the surface and effectively removes the frost layer; when the frost layer thickness exceeds 5 mm, for a thicker frost layer, the spray angle usually needs to be larger, and the pressure and angle of the sprayed liquid help to completely remove the frost layer and can more effectively clean a large area of the surface;

[0068] S11: Generate a frost layer position distribution index according to the frost layer position distribution map;

[0069] S12: Generate a frost layer bottom moisture state index according to the frost layer bottom moisture area;

[0070] S13: Establish a defrosting demand analysis model based on the frost layer thickness status index, the frost layer position distribution index, and the moisture distribution index at the bottom of the frost layer, and generate a defrosting demand index for the aircraft surface.

[0071] As a preferred embodiment of the present invention, the specific method for generating the frost layer position distribution index is as follows:

[0072] Generate the total area of the frost layer according to the frost layer position distribution map.

[0073] It should be noted that the frost layer position distribution map refers to the frost layer position distribution map within the current defrosting area on the aircraft surface, and this distribution map includes the area of the frost layer. In addition, the frost layer position distribution map can be drawn through the visual image obtained by the image sensor, and this drawing method is a prior art and will not be elaborated here.

[0074] Generate the frost layer position distribution index according to the total area of the frost layer and the total area of the corresponding defrosting area on the aircraft surface; the frost layer position distribution index refers to the ratio between the total area of the frost layer and the total area of the corresponding defrosting area on the aircraft surface.

[0075] It should be noted that the total area of the corresponding defrosting area on the aircraft surface refers to a certain area or the entire area on the aircraft surface. For example, if the defrosting area on the aircraft surface is the upper surface of the wing, then the frost layer position distribution map is the frost layer position distribution on the upper surface of the wing.

[0076] As a preferred embodiment of the present invention, the specific method for generating the moisture status index at the bottom of the frost layer is as follows:

[0077] Generate the area ratio according to the moisture area at the bottom of the frost layer and the total area of the frost layer; the area ratio refers to the ratio between the moisture area at the bottom of the frost layer and the total area of the frost layer.

[0078] Generate the ratio difference according to the area ratio and the ratio threshold; the ratio difference refers to the difference between the area ratio and the ratio threshold; the ratio threshold refers to the minimum value of the moisture ratio that can reduce the friction between the frost layer and the aircraft surface.

[0079] Generate the moisture status index at the bottom of the frost layer according to the ratio difference and the ratio threshold; the moisture status index at the bottom of the frost layer refers to the ratio between the ratio difference and the ratio threshold.

[0080] It should be noted that the moisture on the contact surface between the aircraft surface and the bottom of the frost layer can effectively reduce the friction between the aircraft surface and the bottom of the frost layer, thereby reducing the thrust required for the bottom of the frost layer to slide during the movement of the aircraft. The more the area occupied by the moisture, the more obvious the reduction in friction. For example, if the proportion of moisture on the contact surface between the aircraft surface and the bottom of the frost layer exceeds half of the contact surface area, the thrust required for the bottom of the frost layer to slide during the movement of the aircraft will be much smaller than that when the proportion of moisture on the contact surface between the aircraft surface and the bottom of the frost layer does not exceed half of the contact surface area.

[0081] As a preferred embodiment of the present invention, the expression of the defrosting demand analysis model is:

[0082]

[0083] In the expression, K represents the aircraft surface defrosting demand index, H speed represents the frost layer thickness state index, M area represents the frost layer position distribution index, δ represents the moisture distribution index at the bottom of the frost layer, α and β are both weight coefficients, and α + β = 1;

[0084] It should be noted that α and β are set values, and their values are set by relevant personnel in the field; the value-taking methods include but are not limited to the expert consultation method. This technology is an existing technology and will not be elaborated here.

[0085] As a preferred embodiment of the present invention, the determination method of the defrosting method for the frost layer on the aircraft surface is specifically as follows:

[0086] Compare the aircraft surface defrosting demand index with the aircraft surface defrosting demand index threshold;

[0087] It should be noted that the aircraft surface defrosting demand index threshold is a set value, and its value is set by relevant personnel in the field;

[0088] When the aircraft surface defrosting demand index is less than or equal to the aircraft surface defrosting demand index threshold, it is determined that the defrosting method for the frost layer on the aircraft surface is near-parallel spraying; when the defrosting method for the frost layer on the aircraft surface is near-parallel spraying, the theoretical spraying angle of the defrosting vehicle should be modified to the spraying angle corresponding to the near-parallel spraying method;

[0089] When the aircraft surface defrosting demand index is greater than the aircraft surface defrosting demand index threshold, it is determined that the defrosting method for the frost layer on the aircraft surface is near-vertical spraying; when the defrosting method for the frost layer on the aircraft surface is near-vertical spraying, the theoretical spraying angle of the defrosting vehicle should be modified to the spraying angle corresponding to the near-vertical spraying method;

[0090] It should be noted that both near-parallel injection and near-vertical injection are two defrosting methods formed by different injection angles of the defrosting vehicle; the injection angle refers to the included angle formed by the path of the injected gas and the aircraft surface.

[0091] In addition, near-parallel injection is applicable to the case of a relatively thin frost layer. The injection angle of the air flow is relatively gentle, which is conducive to the gas evenly covering the aircraft surface and can effectively remove the relatively light frost layer. For example, the injection angle of near-parallel injection is between 30° and 45°; near-vertical injection is applicable to the case of a relatively thick frost layer. The air flow injection at this angle is more concentrated and is suitable for dealing with relatively stubborn or thick frost layers. For example, the injection angle of near-vertical injection is between 45° and 60°.

[0092] As a preferred embodiment of the present invention, step four specifically includes:

[0093] S40: Obtain the tilt angle of the aircraft surface, and generate a tilt angle influence coefficient according to the tilt angle of the aircraft surface; wherein, the tilt angle influence coefficient refers to the ratio of the difference between the tilt angle of the aircraft surface and the critical tilt angle to the critical tilt angle.

[0094] It should be noted that the critical tilt angle refers to the minimum tilt angle that can force the frost layer to move due to its own gravity; the frost layer adheres to the aircraft surface, that is, the tilt angle of the aircraft surface is the same as the tilt angle of the frost layer.

[0095] S41: Obtain the ambient wind speed and generate an ambient wind speed influence index; wherein, the ambient wind speed influence index refers to the ratio of the difference between the ambient wind speed and the gas movement speed of the gas injected by the defrosting vehicle to the gas movement speed of the gas injected by the defrosting vehicle.

[0096] S42: Obtain the ambient wind angle and generate an ambient wind angle factor; wherein, the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the injection angle of the defrosting vehicle to the angle threshold.

[0097] It should be noted that if the angle difference between the ambient wind angle and the injection angle of the defrosting vehicle is too large, it will cause the thrusts generated by the two on the frost layer to cancel each other out, thereby reducing the force exerted on the frost layer when the defrosting vehicle injects gas, and the greater the angle difference, the more serious the cancellation.

[0098] S43: Obtain the aircraft surface temperature and the frost layer temperature, and generate a temperature difference influence factor; the temperature difference influence factor refers to the ratio of the difference between the aircraft surface temperature and the frost layer temperature to the temperature difference threshold.

[0099] It should be noted that there will be a temperature difference between the surface temperature of the aircraft and the temperature of the frost layer. In some cases, the frost layer can melt on its own through this temperature difference. For example, when the surface temperature of the aircraft is higher than the temperature of the frost layer, the frost layer will absorb the heat from the surface of the aircraft, and then the frost layer will melt after absorbing the heat, so that the thickness of the frost layer can be reduced on its own. When the surface temperature of the aircraft is lower than the temperature of the frost layer, the surface of the aircraft will absorb the heat of the frost layer, so that the adsorption force between the frost layer and the surface of the aircraft increases after the heat of the frost layer is absorbed, increasing the stubbornness of the frost layer.

[0100] S44: Establish an injection angle analysis model, substitute the current injection angle, tilt angle influence coefficient, environmental wind speed influence index, environmental wind angle factor and temperature difference influence factor into the injection angle analysis model, and generate an injection angle adjustment value.

[0101] As a preferred embodiment of the present invention, the expression of the injection angle analysis model is:

[0102] Δθ = θ0 * {(1 + θ air ) * a1 + F envi * (1 + θ envi ) * a2 + (1 - T diff ) * a3} - θ jet ;

[0103] In the expression, Δθ represents the injection angle adjustment value, θ0 represents the theoretical injection angle, θ air represents the tilt angle influence coefficient, F envi represents the environmental wind speed influence index, θ envi represents the environmental wind angle factor, T diff represents the temperature difference influence factor, a1, a2, and a3 are all model parameters, and a1 + a2 + a3 = 1;

[0104] It should be noted that the theoretical injection angle θ0 is obtained according to the defrosting method of the frost layer on the surface of the aircraft; this angle is the middle value or average value of the injection angle range corresponding to the defrosting method of the frost layer on the surface of the aircraft.

[0105] In addition, a1, a2, and a3 are proportional coefficients, which are set by relevant personnel in the field themselves; the ways of their value taking include but are not limited to the expert consultation method.

[0106] Please refer to Figure 2 , the present invention also provides an aircraft defrosting vehicle gas injection control system, which includes:

[0107] A frost layer data acquisition module, which is used to acquire the frost layer data on the surface of the aircraft and the moisture distribution map at the bottom of the frost layer; among them, the frost layer data includes the frost layer thickness and the frost layer position distribution map; the bottom of the frost layer refers to the contact surface between the surface of the aircraft and the frost layer.

[0108] A demand analysis unit, configured to generate a defrosting demand index for the aircraft surface according to the frost layer thickness and the frost layer position distribution map;

[0109] A mode judgment module, configured to judge the defrosting mode of the frost layer on the aircraft surface according to the defrosting demand index of the aircraft surface; wherein, the defrosting modes include near-parallel spraying and near-vertical spraying;

[0110] An angle adjustment analysis unit, based on the defrosting mode of the frost layer on the aircraft surface, the angle adjustment analysis unit is configured to obtain the aircraft surface tilt angle, the ambient wind speed, the ambient wind angle, the aircraft surface temperature and the frost layer temperature, establish a spray angle analysis model, and generate a spray angle adjustment value;

[0111] An adjustment control module, configured to adjust the spray angle of the defrosting vehicle nozzle according to the spray angle adjustment value.

[0112] As a preferred embodiment of the present invention, the demand analysis unit specifically includes:

[0113] A frost layer thickness analysis module, configured to generate a frost layer thickness status index according to the frost layer thickness; wherein, the frost layer thickness status index refers to the ratio between the frost layer thickness and the frost layer thickness threshold; the frost layer thickness threshold refers to the frost layer thickness boundary value at which the defrosting mode needs to be changed;

[0114] A frost layer position analysis module, configured to generate a frost layer position distribution index according to the frost layer position distribution map;

[0115] A frost layer bottom moisture analysis module, configured to generate a frost layer bottom moisture status index according to the frost layer bottom moisture area; the frost layer bottom moisture status index refers to the ratio of the difference between the frost layer bottom moisture area and the total frost layer area to the total frost layer area;

[0116] A demand index generation module, configured to establish a defrosting demand analysis model according to the frost layer thickness status index, the frost layer position distribution index and the frost layer bottom moisture distribution index, and generate a defrosting demand index for the aircraft surface.

[0117] As a preferred embodiment of the present invention, the angle adjustment analysis unit specifically includes:

[0118] An inclination angle analysis module, configured to obtain the aircraft surface inclination angle, and generate an inclination angle influence coefficient according to the aircraft surface inclination angle; wherein, the inclination angle influence coefficient refers to the ratio of the difference between the aircraft surface inclination angle and the inclination angle critical value to the inclination angle critical value;

[0119] The wind speed impact analysis module is used to obtain the ambient wind speed and generate an ambient wind speed impact index; wherein, the ambient wind speed impact index refers to the ratio of the difference between the ambient wind speed and the gas movement speed of the gas ejected by the defrosting vehicle to the gas movement speed of the gas ejected by the defrosting vehicle.

[0120] The ambient wind angle analysis module is used to obtain the ambient wind angle and generate an ambient wind angle factor; wherein, the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the ejection angle of the defrosting vehicle to the angle threshold.

[0121] The temperature difference analysis module is used to obtain the aircraft surface temperature and the frost layer temperature and generate a temperature difference impact factor; the temperature difference impact factor refers to the ratio of the difference between the aircraft surface temperature and the frost layer temperature to the temperature difference threshold.

[0122] The ejection angle adjustment value generation module is used to establish an ejection angle analysis model, and substitute the current ejection angle, the tilt angle influence coefficient, the ambient wind speed impact index, the ambient wind angle factor and the temperature difference impact factor into the ejection angle analysis model to generate an ejection angle adjustment value.

[0123] The present invention generates a dynamic defrosting demand index based on the frost layer thickness, position distribution and bottom moisture state, combines parameters such as the ambient wind speed and the aircraft tilt angle, and adjusts the nozzle angle (nearly parallel or nearly vertical ejection) in real time through the ejection angle analysis model to ensure that the airflow evenly covers different areas and avoid local over-treatment or under-treatment. It also combines parameters such as the ambient wind speed, the aircraft tilt angle, and the frost layer bottom moisture state index for multi-dimensional data fusion and dynamic control, significantly improving the defrosting efficiency, uniformity and environmental adaptability.

[0124] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas injection control method for an aircraft defrosting vehicle, characterized in that, It includes the following steps: Obtain the frost layer data on the aircraft surface and the moisture distribution map at the bottom of the frost layer; among them, the frost layer data includes the frost layer thickness and the frost layer position distribution map; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer; Generate the defrosting demand index on the aircraft surface according to the frost layer thickness and the frost layer position distribution map; Judge the defrosting method of the frost layer on the aircraft surface according to the defrosting demand index on the aircraft surface; among them, the defrosting methods include near-parallel spraying and near-vertical spraying; Based on the defrosting method of the frost layer on the aircraft surface, obtain the aircraft surface inclination angle, ambient wind speed, ambient wind angle, aircraft surface temperature and frost layer temperature, establish a spray angle analysis model, and generate a spray angle adjustment value; Adjust the spray angle of the defrosting vehicle nozzle according to the spray angle adjustment value.

2. The gas injection control method of an aircraft defroster vehicle according to claim 1, wherein The generating of the defrosting demand index on the aircraft surface according to the frost layer thickness and the frost layer position distribution map specifically includes: Generate a frost layer thickness status index according to the frost layer thickness; among them, the frost layer thickness status index refers to the ratio between the frost layer thickness and the frost layer thickness threshold; the frost layer thickness threshold refers to the frost layer thickness demarcation value at which the defrosting method needs to be changed; Generate a frost layer position distribution index according to the frost layer position distribution map; Generate a moisture status index at the bottom of the frost layer according to the moisture area at the bottom of the frost layer; Establish a defrosting demand analysis model according to the frost layer thickness status index, the frost layer position distribution index and the moisture distribution index at the bottom of the frost layer, and generate the defrosting demand index on the aircraft surface.

3. A gas injection control method for an aircraft defrosting vehicle according to claim 2, characterized in that The specific generating method of the frost layer position distribution index is: Generate the total frost layer area according to the frost layer position distribution map; Generate a frost layer position distribution index according to the total frost layer area and the total area of the corresponding defrosting area on the aircraft surface; the frost layer position distribution index refers to the ratio between the total frost layer area and the total area of the corresponding defrosting area on the aircraft surface.

4. A gas injection control method for an aircraft defroster vehicle according to claim 2, characterized in that The specific generating method of the moisture status index at the bottom of the frost layer is: Generate an area ratio according to the moisture area at the bottom of the frost layer and the total frost layer area; the area ratio refers to the ratio between the moisture area at the bottom of the frost layer and the total frost layer area; Generate a ratio difference according to the area ratio and the ratio threshold; the ratio difference refers to the difference between the area ratio and the ratio threshold; The ratio threshold refers to the minimum value of the moisture ratio that can reduce the friction between the frost layer and the aircraft surface; Generate a moisture status index at the bottom of the frost layer according to the ratio difference and the ratio threshold; the moisture status index at the bottom of the frost layer refers to the ratio between the ratio difference and the ratio threshold.

5. A method for controlling gas injection of an aircraft defroster vehicle according to claim 2, characterized in that, The expression of the defrosting demand analysis model is: In the expression, K represents the aircraft surface defrosting demand index, and H speed represents the frost layer thickness state index, M area represents the frost layer position distribution index, δ represents the moisture distribution index at the bottom of the frost layer, and α and β are both weighting coefficients, and α + β = 1.

6. A method for controlling gas injection of an aircraft defrosting vehicle according to claim 1, characterized in that, The specific generating method of the spray angle adjustment value includes: Obtain the aircraft surface inclination angle, and generate an inclination angle influence coefficient according to the aircraft surface inclination angle; among them, the inclination angle influence coefficient refers to the ratio of the difference between the aircraft surface inclination angle and the inclination angle critical value to the inclination angle critical value; Obtain the ambient wind speed and generate an ambient wind speed influence index; among them, the ambient wind speed influence index refers to the ratio of the difference between the ambient wind speed and the gas moving speed of the gas sprayed by the defrosting vehicle to the gas moving speed of the gas sprayed by the defrosting vehicle; Obtain the environmental wind angle and generate an environmental wind angle factor; where the environmental wind angle factor refers to the ratio of the difference between the environmental wind angle and the spraying angle of the defrosting vehicle to the angle threshold; Obtain the aircraft surface temperature and the frost layer temperature and generate a temperature difference influence factor; the temperature difference influence factor refers to the ratio of the difference between the aircraft surface temperature and the frost layer temperature to the temperature difference threshold; Establish a spraying angle analysis model, substitute the current spraying angle, tilt angle influence coefficient, environmental wind speed influence index, environmental wind angle factor, and temperature difference influence factor into the spraying angle analysis model, and generate a spraying angle adjustment value.

7. A method for controlling gas injection of an aircraft defrosting vehicle according to claim 6, characterized in that, The expression of the spraying angle analysis model is: Δθ = θ0 * {(1 + θ air ) * a1 + F envi * (1 + θ envi ) * a2 + (1 - T diff ) * a3} - θ jet ; In the expression, Δθ represents the injection angle adjustment value, θ0 represents the theoretical injection angle, and θ air represents the tilt angle influence coefficient, F envi represents the environmental wind speed influence index, θ envi represents the environmental wind angle factor, T diff represents the temperature difference influence factor. a1, a2, and a3 are all model parameters, and a1 + a2 + a3 = 1.

8. An aircraft defrosting vehicle gas injection control system for implementing the aircraft defrosting vehicle gas injection control method according to any one of claims 1-7, characterized in that, The system includes: A frost layer data acquisition module for acquiring the frost layer data on the aircraft surface and the moisture distribution map at the bottom of the frost layer; where the frost layer data includes the frost layer thickness and the frost layer position distribution map; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer; A demand analysis unit for generating an aircraft surface defrosting demand index based on the frost layer thickness and the frost layer position distribution map; A mode judgment module for judging the defrosting method of the frost layer on the aircraft surface according to the aircraft surface defrosting demand index; where the defrosting methods include near-parallel spraying and near-vertical spraying; An angle adjustment analysis unit, based on the defrosting method of the frost layer on the aircraft surface, the angle adjustment analysis unit is used to obtain the aircraft surface tilt angle, environmental wind speed, environmental wind angle, aircraft surface temperature, and frost layer temperature, establish a spraying angle analysis model, and generate a spraying angle adjustment value; An adjustment control module for adjusting the spraying angle of the defrosting vehicle nozzle according to the spraying angle adjustment value.

9. The gas injection control system of an aircraft defroster vehicle according to claim 8, characterized in that, The demand analysis unit specifically includes: A frost layer thickness analysis module for generating a frost layer thickness state index according to the frost layer thickness; where the frost layer thickness state index refers to the ratio of the frost layer thickness to the frost layer thickness threshold; the frost layer thickness threshold refers to the frost layer thickness boundary value at which the defrosting method needs to be changed; A frost layer position analysis module for generating a frost layer position distribution index according to the frost layer position distribution map; A frost layer bottom moisture analysis module for generating a frost layer bottom moisture state index according to the frost layer bottom moisture area; the frost layer bottom moisture state index refers to the ratio of the difference between the frost layer bottom moisture area and the total frost layer area to the total frost layer area; A demand index generation module for establishing a defrosting demand analysis model according to the frost layer thickness state index, the frost layer position distribution index, and the frost layer bottom moisture distribution index, and generating an aircraft surface defrosting demand index.

10. A gas injection control system for an aircraft defrosting vehicle according to claim 8, characterized in that The angle adjustment analysis unit specifically includes: A tilt angle analysis module for obtaining the aircraft surface tilt angle and generating a tilt angle influence coefficient according to the aircraft surface tilt angle; where the tilt angle influence coefficient refers to the ratio of the difference between the aircraft surface tilt angle and the tilt angle critical value to the tilt angle critical value; A wind speed influence analysis module for obtaining the environmental wind speed and generating an environmental wind speed influence index; where the environmental wind speed influence index refers to the ratio of the difference between the environmental wind speed and the gas movement speed of the gas sprayed by the defrosting vehicle to the gas movement speed of the gas sprayed by the defrosting vehicle; An environmental wind angle analysis module, which is used to obtain the environmental wind angle and generate an environmental wind angle factor; wherein, the environmental wind angle factor refers to the ratio of the difference between the environmental wind angle and the spraying angle of the defrosting vehicle to the angle threshold; A temperature difference analysis module, which is used to obtain the aircraft surface temperature and the frost layer temperature and generate a temperature difference influence factor; the temperature difference influence factor refers to the ratio of the difference between the aircraft surface temperature and the frost layer temperature to the temperature difference threshold; A spraying angle adjustment value generation module, which is used to establish a spraying angle analysis model, substitute the current spraying angle, the tilt angle influence coefficient, the environmental wind speed influence index, the environmental wind angle factor and the temperature difference influence factor into the spraying angle analysis model, and generate a spraying angle adjustment value.

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