Aircraft defroster cart gas injection control method and system

Abstract

The application discloses a kind of aircraft defrosting vehicle gas injection control method and system, belong to aircraft defrosting equipment technical field, including obtaining frost layer data and frost layer bottom moisture distribution diagram of aircraft surface, generate aircraft surface defrosting demand index, and determine the defrosting mode of aircraft surface frost layer;Obtain aircraft surface inclination angle, environmental wind speed, environmental wind angle, aircraft surface temperature and frost layer temperature, generate injection angle adjustment value, and adjust the injection angle of defrosting vehicle nozzle;The application generates dynamic defrosting demand index by frost layer thickness, position distribution and bottom moisture state, combines environmental wind speed, aircraft inclination angle and other parameters, adjusts nozzle angle in real time through injection angle analysis model, including near parallel and near vertical injection, Ensure that airflow uniformly covers different areas, avoid local excessive or insufficient treatment, also carry out fusion and dynamic regulation and control to multidimensional data, significantly improve defrosting efficiency, uniformity and environmental adaptability.

Description

Technical Field

[0001] This 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 Technology

[0002] Aircraft defrosting vehicles are crucial equipment for ensuring aviation safety. They remove frost from aircraft surfaces through gas jets, preventing icing from affecting flight performance. Gas jet control, as a core component, directly impacts defrosting efficiency and coverage.

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

[0004] To address the shortcomings of existing technologies, this invention provides a gas injection control method and system for aircraft defrosting vehicles, which solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides a gas injection control method for an aircraft defrosting vehicle, comprising the following steps:

[0006] Acquire frost data and moisture distribution maps at the bottom of the frost layer on the aircraft surface; the frost data includes frost thickness and frost location distribution maps; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer.

[0007] Based on the frost thickness and frost location distribution map, an aircraft surface defrosting demand index is generated;

[0008] Based on the aircraft surface defrosting demand index, determine the defrosting method for the frost layer on the aircraft surface; among which, the defrosting methods include near-parallel spraying and near-vertical spraying.

[0009] Based on the defrosting method of aircraft surface frost, the aircraft surface tilt angle, ambient wind speed, ambient wind angle, aircraft surface temperature and frost temperature are obtained, a jet angle analysis model is established, and jet angle adjustment values ​​are generated.

[0010] The spray angle of the defrosting truck nozzles is adjusted according to the spray angle adjustment value.

[0011] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0012] Further technical solution: The step of generating an aircraft surface defrosting demand index based on the frost thickness and frost location distribution map specifically includes:

[0013] Based on the frost thickness, a frost thickness state index is generated; whereby the frost thickness state index refers to the ratio between the frost thickness and the frost thickness threshold; the frost thickness threshold refers to the frost thickness boundary value at which the defrosting method needs to be changed.

[0014] Based on the frost location distribution map, generate the frost location distribution index;

[0015] The moisture state index at the bottom of the frost layer is generated based on the area of ​​moisture at the bottom of the frost layer.

[0016] Based on the frost thickness state index, frost location distribution index, and frost bottom moisture distribution index, a defrosting demand analysis model is established to generate the aircraft surface defrosting demand index.

[0017] A further technical solution: The specific method for generating the frost layer location distribution index is as follows:

[0018] Based on the frost distribution map, generate the total frost area;

[0019] The frost location distribution index is generated based on the total area of ​​the frost layer and the total area of ​​the corresponding defrosting area on the aircraft surface. The frost location 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.

[0020] A further technical solution: The specific method for generating the moisture state index at the bottom of the frost layer is as follows:

[0021] The area ratio is calculated based on the area of ​​moisture at the bottom of the frost layer and the total area of ​​the frost layer; the area ratio refers to the ratio between the area of ​​moisture at the bottom of the frost layer and the total area of ​​the frost layer.

[0022] Based on the area ratio and the ratio threshold, a ratio difference is generated; the ratio difference refers to the difference between the area ratio and the ratio threshold; the ratio threshold refers to the minimum water content that can reduce the friction between the frost layer and the aircraft surface.

[0023] Based on the percentage difference and percentage threshold, the moisture state index at the bottom of the frost layer is generated; the moisture state index at the bottom of the frost layer refers to the ratio between the percentage difference and the percentage threshold.

[0024] A further technical solution: The expression for the defrosting demand analysis model is as follows:

[0025]

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

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

[0028] Obtain the aircraft surface tilt angle, and generate a tilt angle influence coefficient based on 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.

[0029] The ambient wind speed is obtained, and the ambient wind speed influence index is generated. 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 sprayed by the defrosting truck to the gas movement speed of the gas sprayed by the defrosting truck.

[0030] Obtain the ambient wind angle and generate the ambient wind angle factor; whereby the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the defrosting vehicle spray angle to the angle threshold.

[0031] The aircraft surface temperature and frost temperature are obtained, and a temperature difference influence factor is generated. The temperature difference influence factor refers to the ratio of the difference between the aircraft surface temperature and the frost temperature to the temperature difference threshold.

[0032] A jet angle analysis model is established, and the current jet angle, tilt angle influence coefficient, ambient wind speed influence index, ambient wind angle factor, and temperature difference influence factor are substituted into the jet angle analysis model to generate jet angle adjustment values.

[0033] A further technical solution: The expression for the injection angle analysis model is as follows:

[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, and θ air This represents the tilt angle influence coefficient, F. envi The value θ represents the environmental wind speed impact index. envi T represents the environmental wind angle factor. diff This represents the temperature difference influence factor. a1, a2, and a3 are all model parameters, and a1+a2+a3=1.

[0036] A gas injection control system for an aircraft defrosting vehicle, the system comprising:

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

[0038] The demand analysis unit is used to generate an aircraft surface defrosting demand index based on the frost thickness and frost location distribution map.

[0039] The mode determination module is used to determine the defrosting method for the frost layer on the aircraft surface based on the aircraft surface defrosting demand index; among which, the defrosting methods include near-parallel spraying and near-vertical spraying.

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

[0041] The adjustment control module is used to adjust the spray angle of the defrosting truck nozzles according to the spray angle adjustment value.

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

[0043] The frost thickness analysis module is used to generate a frost thickness state index based on the frost thickness. The frost thickness state index refers to the ratio between the frost thickness and the frost thickness threshold. The frost thickness threshold refers to the frost thickness boundary value at which the defrosting method needs to be changed.

[0044] The frost location analysis module is used to generate a frost location distribution index based on the frost location distribution map.

[0045] The frost bottom moisture analysis module is used to generate the frost bottom moisture state index based on the area of ​​moisture at the bottom of the frost layer; the frost bottom moisture state index refers to the ratio of the difference between the area of ​​moisture at the bottom of the frost layer and the total area of ​​the frost layer to the total area of ​​the frost layer.

[0046] The demand index generation module is used to establish a defrosting demand analysis model based on the frost thickness state index, frost location distribution index, and frost bottom moisture distribution index, and generate the aircraft surface defrosting demand index.

[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 based on the tilt angle. 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 the ambient wind speed impact index. 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 sprayed by the defrosting truck to the gas movement speed of the gas sprayed by the defrosting truck.

[0050] The ambient wind angle analysis module is used to obtain the ambient wind angle and generate the ambient wind angle factor; the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the defrosting truck spray angle to the angle threshold.

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

[0052] The jet angle adjustment value generation module is used to establish a jet angle analysis model. It substitutes the current jet angle, tilt angle influence coefficient, ambient wind speed influence index, ambient wind angle factor, and temperature difference influence factor into the jet angle analysis model to generate the jet angle adjustment value.

[0053] This invention provides a gas injection control method and system for aircraft defrosting vehicles, which has the following advantages compared with the prior art:

[0054] This invention generates a dynamic defrosting demand index by analyzing the thickness, location, and moisture state of the frost layer. Combined with parameters such as ambient wind speed and aircraft tilt angle, it adjusts the nozzle angle in real time using a jet angle analysis model to ensure that the airflow evenly covers different areas, avoiding local over- or under-treatment. Furthermore, it integrates and dynamically controls multi-dimensional data by combining parameters such as ambient wind speed, aircraft tilt angle, and moisture state index at the bottom of the frost layer, significantly improving defrosting efficiency, uniformity, and environmental adaptability. Attached Figure Description

[0055] Figure 1 This is a flowchart illustrating a gas injection control method for an aircraft defrosting vehicle, provided as an embodiment of the present invention.

[0056] Figure 2 This is a schematic diagram of the structure of a gas injection control system for an aircraft defrosting vehicle, provided as an embodiment of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0058] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0059] Please see Figure 1 The present invention provides a gas injection control method for an aircraft defrosting vehicle, comprising the following steps:

[0060] Step 1: Obtain frost data and moisture distribution map at the bottom of the frost layer on the aircraft surface; the frost data includes frost thickness and frost location 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 the aircraft surface defrosting demand index based on the frost thickness and frost location distribution map;

[0062] Step 3: Determine the defrosting method for the aircraft surface based on the aircraft surface defrosting demand index; the defrosting methods include near-parallel spraying and near-vertical spraying.

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

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

[0065] In a preferred embodiment of the present invention, step two specifically includes the following steps:

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

[0067] It should be explained that the theoretical spray angle of the defrosting truck will vary depending on the thickness of the frost layer. For example, when the frost layer is 1-2 mm thick, the spray angle can be relatively small, and the more concentrated spray can effectively remove the frost layer. Thin frost layers are easily removed without much time. When the frost layer is 3-5 mm thick, the spray angle needs to be slightly adjusted, possibly using a medium spray angle to ensure that the liquid covers the surface and effectively removes the frost. When the frost layer is thicker than 5 mm, the spray angle usually needs to be larger. The pressure and angle of the sprayed liquid help to thoroughly remove the frost layer and can more effectively clean large surfaces.

[0068] S11: Generate the frost location distribution index based on the frost location distribution map;

[0069] S12: Generate the moisture state index at the bottom of the frost layer based on the water area at the bottom of the frost layer;

[0070] S13: Based on the frost thickness state index, frost location distribution index, and frost bottom moisture distribution index, establish a defrosting demand analysis model to generate the aircraft surface defrosting demand index.

[0071] In a preferred embodiment of the present invention, the frost layer location distribution index is generated in the following manner:

[0072] Based on the frost distribution map, generate the total frost area;

[0073] It should be explained that the frost location distribution map refers to the distribution map of the frost location within the current defrosting area on the aircraft surface, and this distribution map includes the area of ​​the frost. In addition, the frost location distribution map can be drawn from visual images obtained by image sensors. This drawing method is existing technology and will not be described in detail here.

[0074] A frost location distribution index is generated based on the total area of ​​the frost layer and the total area of ​​the corresponding defrosting area on the aircraft surface. The frost location 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 explained that the total area of ​​the corresponding aircraft surface defrosting area refers to a certain area of ​​the aircraft surface or the entire area of ​​the aircraft surface; for example, if the aircraft surface defrosting area is the upper surface of the wing, then the frost distribution map is the distribution of the frost on the upper surface of the wing.

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

[0077] The area ratio is calculated based on the area of ​​moisture at the bottom of the frost layer and the total area of ​​the frost layer; the area ratio refers to the ratio between the area of ​​moisture at the bottom of the frost layer and the total area of ​​the frost layer.

[0078] Based on the area ratio and the ratio threshold, a ratio difference is generated; the ratio difference refers to the difference between the area ratio and the ratio threshold; the ratio threshold refers to the minimum water content that can reduce the friction between the frost layer and the aircraft surface.

[0079] Based on the percentage difference and the percentage threshold, a moisture state index at the bottom of the frost layer is generated; the moisture state index at the bottom of the frost layer refers to the ratio between the percentage difference and the percentage threshold.

[0080] It should be explained 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 two surfaces, thereby reducing the thrust required for the frost layer to slide when the aircraft is sliding. The more area covered by moisture, the more significant the reduction in friction. For example, if the moisture content on the contact surface between the aircraft surface and the bottom of the frost layer exceeds half of the contact area, the thrust required for the frost layer to slide when the aircraft is sliding will be much less than the thrust required when the moisture content on the contact surface is less than half of the contact area.

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

[0082]

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

[0084] It should be noted that α and β are set values, which are determined by those skilled in the art; the methods of determining these values ​​include, but are not limited to, expert consultation, which is existing technology and will not be elaborated here.

[0085] In a preferred embodiment of the present invention, the method for determining the defrosting mode of the aircraft surface frost layer 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 threshold for the aircraft surface defrosting demand index is a set value, and its value is set by relevant personnel in this field.

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

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

[0090] It should be explained that 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 angle formed between the path of the injected gas and the surface of the aircraft.

[0091] Furthermore, near-parallel jetting is suitable for thinner frost layers. The airflow angle is relatively gentle, which helps to evenly cover the aircraft surface and effectively removes lighter frost layers. For example, the jet angle for near-parallel jetting is between 30° and 45°. Near-vertical jetting is suitable for thicker frost layers. The airflow at this angle is more concentrated, making it suitable for handling more stubborn or thicker frost layers. For example, the jet angle for near-vertical jetting is between 45° and 60°.

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

[0093] S40: Obtain the aircraft surface tilt angle and generate a tilt angle influence coefficient based on 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.

[0094] It should be explained 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 ambient wind speed and generate ambient wind speed influence index; whereby, ambient wind speed influence index refers to the ratio of the difference between ambient wind speed and the gas movement speed of the gas sprayed by the defrosting truck to the gas movement speed of the gas sprayed by the defrosting truck.

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

[0097] It should be explained that if the angle difference between the ambient wind angle and the defrosting truck's spray angle is too large, the thrust generated by the two on the frost layer will cancel each other out, thereby reducing the force exerted on the frost layer by the defrosting truck's gas spray. The greater the angle difference, the more severe the cancellation.

[0098] S43: Obtain the aircraft surface temperature and frost 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 temperature to the temperature difference threshold.

[0099] It should be explained that there is a temperature difference between the aircraft surface temperature and the frost temperature. This temperature difference can cause the frost to melt on its own under certain circumstances. For example, if the aircraft surface temperature is higher than the frost temperature, the frost will absorb heat from the aircraft surface and melt after absorbing the heat, thus reducing the thickness of the frost. If the aircraft surface temperature is lower than the frost temperature, the aircraft surface will absorb heat from the frost, thus increasing the adhesion between the frost and the aircraft surface after absorbing the heat, making the frost more stubborn.

[0100] S44: Establish a jet angle analysis model, and substitute the current jet angle, tilt angle influence coefficient, ambient wind speed influence index, ambient wind angle factor and temperature difference influence factor into the jet angle analysis model to generate jet angle adjustment values.

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

[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, and θ air This represents the tilt angle influence coefficient, F. envi The value θ represents the environmental wind speed impact index. envi T represents the environmental wind angle factor. diff This represents the temperature difference influence factor. a1, a2, and a3 are all model parameters, and a1+a2+a3=1;

[0104] It should be explained that the theoretical spray angle θ0 is determined based on the defrosting method of the frost layer on the aircraft surface; this angle is the median or average of the range of spray angles corresponding to the defrosting method of the aircraft surface frost layer.

[0105] In addition, a1, a2, and a3 are proportional coefficients, which are set by relevant personnel in the field; their values ​​are determined by methods including but not limited to expert consultation.

[0106] Please see Figure 2 The present invention also provides a gas injection control system for an aircraft defrosting vehicle, the system comprising:

[0107] The frost data acquisition module is used to acquire frost data on the aircraft surface and a moisture distribution map at the bottom of the frost layer; the frost data includes frost thickness and frost location distribution map; the bottom of the frost layer refers to the contact surface between the aircraft surface and the frost layer;

[0108] The demand analysis unit is used to generate an aircraft surface defrosting demand index based on the frost thickness and frost location distribution map.

[0109] The mode determination module is used to determine the defrosting method for the frost layer on the aircraft surface based on the aircraft surface defrosting demand index; among which, the defrosting methods include near-parallel spraying and near-vertical spraying.

[0110] An angle adjustment analysis unit, based on the defrosting method of the frost layer on the aircraft surface, is used to obtain the aircraft surface tilt angle, ambient wind speed, ambient wind angle, aircraft surface temperature and frost layer temperature, establish a jet angle analysis model, and generate jet angle adjustment values.

[0111] The adjustment control module is used to adjust the spray angle of the defrosting truck nozzles according to the spray angle adjustment value.

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

[0113] The frost thickness analysis module is used to generate a frost thickness state index based on the frost thickness. The frost thickness state index refers to the ratio between the frost thickness and the frost thickness threshold. The frost thickness threshold refers to the frost thickness boundary value at which the defrosting method needs to be changed.

[0114] The frost location analysis module is used to generate a frost location distribution index based on the frost location distribution map.

[0115] The frost bottom moisture analysis module is used to generate the frost bottom moisture state index based on the area of ​​moisture at the bottom of the frost layer; the frost bottom moisture state index refers to the ratio of the difference between the area of ​​moisture at the bottom of the frost layer and the total area of ​​the frost layer to the total area of ​​the frost layer.

[0116] The demand index generation module is used to establish a defrosting demand analysis model based on the frost thickness state index, frost location distribution index, and frost bottom moisture distribution index, and generate the aircraft surface defrosting demand index.

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

[0118] The tilt angle analysis module is used to obtain the tilt angle of the aircraft surface and generate a tilt angle influence coefficient based on the tilt angle. 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.

[0119] The wind speed impact analysis module is used to obtain the ambient wind speed and generate the ambient wind speed impact index. 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 sprayed by the defrosting truck to the gas movement speed of the gas sprayed by the defrosting truck.

[0120] The ambient wind angle analysis module is used to obtain the ambient wind angle and generate the ambient wind angle factor; the ambient wind angle factor refers to the ratio of the difference between the ambient wind angle and the defrosting truck spray angle to the angle threshold.

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

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

[0123] This invention generates a dynamic defrosting demand index by analyzing frost thickness, location distribution, and bottom moisture state. Combined with parameters such as ambient wind speed and aircraft tilt angle, it adjusts the nozzle angle in real time (near-parallel or near-vertical spraying) through a spray angle analysis model to ensure that airflow uniformly covers different areas and avoids local over- or under-treatment. Furthermore, it integrates and dynamically controls multi-dimensional data by combining parameters such as ambient wind speed, aircraft tilt angle, and bottom moisture state index of the frost layer, significantly improving defrosting efficiency, uniformity, and environmental adaptability.

[0124] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aircraft defroster cart gas injection control method, characterized by, The method comprises the following steps: Obtain the frost data and the frost bottom moisture distribution of the aircraft surface; wherein the frost data comprises the frost thickness and the frost position distribution; the frost bottom refers to the contact surface between the aircraft surface and the frost; According to the frost thickness and the frost position distribution, generate the aircraft surface deicing demand index; According to the aircraft surface deicing demand index, determine the deicing mode of the aircraft surface frost; wherein the deicing mode comprises near-parallel spraying and near-vertical spraying; Based on the deicing mode of the aircraft surface frost, obtain the aircraft surface inclination angle, the environmental wind speed, the environmental wind angle, the aircraft surface temperature and the frost temperature, establish a spraying angle analysis model, and generate a spraying angle adjustment value; According to the spraying angle adjustment value, adjust the spraying angle of the deicing vehicle nozzle; The generation mode of the spraying angle adjustment value specifically comprises: Obtain the aircraft surface inclination angle, and according to the aircraft surface inclination angle, generate an inclination angle influence coefficient; 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; Obtain the environmental wind speed, and generate an environmental wind speed influence index; wherein the environmental wind speed influence index refers to the ratio of the difference between the environmental wind speed and the gas moving speed of the gas sprayed by the deicing vehicle to the gas moving speed of the gas sprayed by the deicing vehicle; 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 deicing vehicle spraying angle to the angle threshold value; Obtain the aircraft surface temperature and the frost 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 temperature to the temperature difference threshold value; Establish a spraying angle analysis model, and input the current spraying angle, the inclination 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 to generate the spraying angle adjustment value; 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, θ air represents the inclination 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, a3 are all model parameters, and a1+a2+a3=1.

2. The method of claim 1, wherein, The generation of the aircraft surface deicing demand index according to the frost thickness and the frost position distribution specifically comprises: According to the frost thickness, generate a frost thickness state index; wherein the frost thickness state index refers to the ratio between the frost thickness and the frost thickness threshold value; the frost thickness threshold value refers to the frost thickness demarcation value that needs to change the deicing mode; According to the frost position distribution, generate a frost position distribution index; According to the frost bottom moisture area, generate a frost bottom moisture state index; According to the frost thickness state index, the frost position distribution index and the frost bottom moisture distribution index, establish a deicing demand analysis model, and generate the aircraft surface deicing demand index.

3. A method of gas injection control for an aircraft defroster cart according to claim 2, wherein The generation mode of the frost position distribution index specifically comprises: According to the frost position distribution, generate a total frost area; According to the total frost area and the total area of the corresponding aircraft surface deicing area, generate the frost position distribution index; the frost position distribution index refers to the ratio between the total frost area and the total area of the corresponding aircraft surface deicing area.

4. The method of claim 2, wherein, The generation mode of the frost bottom moisture state index specifically comprises: According to the frost layer bottom moisture area and the frost layer total area, an area proportion is generated; the area proportion refers to a ratio between the frost layer bottom moisture area and the frost layer total area; According to the area proportion and the proportion threshold value, a proportion difference value is generated; the proportion difference value refers to a difference between the area proportion and the proportion threshold value; The proportion threshold value refers to a minimum value of the moisture proportion capable of reducing the friction between the frost layer and the aircraft surface; According to the proportion difference value and the proportion threshold value, a frost layer bottom moisture state index is generated; the frost layer bottom moisture state index refers to a ratio between the proportion difference value and the proportion threshold value.

5. The method of claim 2, wherein, The expression of the defrosting demand analysis model is: In the expression, K represents the aircraft surface deicing demand index, H speed represents the frost layer thickness state index, M area represents the frost layer position distribution index, δ represents the frost layer bottom moisture distribution index, and α and β are weight coefficients, and α+β=1.

6. An aircraft de-icing vehicle gas injection control system for performing the aircraft de-icing vehicle gas injection control method of any one of claims 1-5, characterized by, The system comprises: A frost layer data acquisition module is configured to acquire frost layer data of an aircraft surface and a frost layer bottom moisture distribution map; wherein the frost layer data comprises a frost layer thickness and a frost layer position distribution map; the frost layer bottom refers to a contact surface between the aircraft surface and the frost layer; A demand analysis unit is configured to generate an aircraft surface defrosting demand index according to the frost layer thickness and the frost layer position distribution map; A mode judgment module is configured to judge a defrosting mode of the aircraft surface frost layer according to the aircraft surface defrosting demand index; wherein the defrosting mode comprises near-parallel spraying and near-vertical spraying; An angle adjustment analysis unit is configured to acquire an aircraft surface inclination angle, an environmental wind speed, an environmental wind angle, an aircraft surface temperature and a frost layer temperature, establish a spraying angle analysis model, and generate a spraying angle adjustment value based on the defrosting mode of the aircraft surface frost layer; An adjustment control module is configured to adjust a spraying angle of a defrosting vehicle nozzle according to the spraying angle adjustment value.

7. An aircraft defroster cart gas injection control system as defined in claim 6, wherein, The demand analysis unit specifically comprises: A frost layer thickness analysis module is configured to generate a frost layer thickness state index according to the frost layer thickness; wherein the frost layer thickness state index refers to a ratio between the frost layer thickness and a frost layer thickness threshold value; the frost layer thickness threshold value refers to a frost layer thickness demarcation value requiring a change in the defrosting mode; A frost layer position analysis module is configured to generate a frost layer position distribution index according to the frost layer position distribution map; A frost layer bottom moisture analysis module is configured to generate a frost layer bottom moisture state index according to the frost layer bottom moisture area; the frost layer bottom moisture state index refers to a ratio between a difference between the frost layer bottom moisture area and the frost layer total area and the frost layer total area; A demand index generation module is configured to establish 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 generate an aircraft surface defrosting demand index.

8. An aircraft defroster cart gas injection control system as defined in claim 6, wherein, The angle adjustment analysis unit specifically comprises: An inclination angle analysis module is configured to acquire an 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 a ratio between a difference between the aircraft surface inclination angle and an inclination angle critical value and the inclination angle critical value; A wind speed influence analysis module is configured to acquire an environmental wind speed, and generate an environmental wind speed influence index; wherein the environmental wind speed influence index refers to a ratio between a difference between the environmental wind speed and a gas movement speed of a gas sprayed by a defrosting vehicle and the gas movement speed of the gas sprayed by the defrosting vehicle; An environmental wind angle analysis module is configured to obtain an environmental wind angle and generate an environmental wind angle factor. The environmental wind angle factor refers to a ratio of a difference between the environmental wind angle and a spraying angle of the defroster vehicle to an angle threshold value. A temperature difference analysis module is configured to obtain an aircraft surface temperature and a frost layer temperature and generate a temperature difference influence factor. The temperature difference influence factor refers to a ratio of a difference between the aircraft surface temperature and the frost layer temperature to a temperature difference threshold value. A spraying angle adjustment value generation module is configured to establish a spraying angle analysis model, and input the current spraying angle, the inclination 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 to generate a spraying angle adjustment value.

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