Method and system for determining landing plunger load of single-cavity oil-gas hybrid undercarriage

Abstract

The invention belongs to the technical field of single-cavity oil-gas hybrid undercarriage design, and particularly relates to a single-cavity oil-gas hybrid undercarriage landing plunger load determination method and system, which can conveniently and accurately calculate the single-cavity oil-gas hybrid undercarriage landing plunger load. According to the method, the dynamic change process of the plunger load can be calculated, the accuracy is high, effective input can be provided for the structural strength design of the plunger, detailed design of the plunger is facilitated, and accurate calculation and assessment of the strength of the plunger and weight reduction calculation are facilitated.

Description

Technical Field

[0001] The present application belongs to the technical field of single-chamber oil-gas hybrid landing gear design, and specifically relates to a method and system for determining a landing plunger load of a single-chamber oil-gas hybrid landing gear. Background Art

[0002] Single-chamber oil-gas hybrid landing gear internal buffer Figure 1 As shown, the upper part of the buffer strut is an air cavity, the lower part is an oil cavity, the plunger is distributed in the air cavity, and the lower part of the plunger has an oil distribution plate connected to the plunger through a thread, and the air cavity and the oil cavity are separated by the oil distribution plate. During the positive stroke, the buffer strut is compressed, and the oil in the oil cavity flows toward the air cavity through the small oil holes on the oil distribution plate, generating a damping force. During the reverse stroke, the buffer strut is extended, and the oil flows back toward the oil cavity through the reverse stroke oil hole, and this is repeated to absorb and consume the landing energy of the aircraft.

[0003] The internal buffer plunger load of a single-chamber oil-gas hybrid landing gear is the pressure difference between the air chamber and the oil chamber, and is the input for the strength check of the plunger structure design. Currently, most theoretical methods are used to establish a balance equation between the external load of the buffer strut and the buffer oil damping force and air spring force. According to the cross-sectional areas of the air chamber, oil chamber, oil hole, the initial volume and pressure of the gas, and the compression of the buffer, the pressure values ​​of the air chamber and oil chamber under each compression are solved, and then the plunger load is calculated. This method has a simple and clear theoretical basis and is easy to implement. However, it can only calculate the pressure of each chamber in the positive stroke of the buffer, and cannot accurately calculate the internal pressure of the buffer during the reverse stroke. When calculating the strength of the plunger, the difference between the pressure of the air chamber and the oil chamber in the reverse stroke is also required. It is usually assumed that the oil chamber pressure is zero during the reverse stroke, and the calculated pressure difference is too large. The plunger load obtained in this way is usually conservative and difficult to effectively guide the buffer design.

[0004] This application is proposed in view of the above-mentioned technical defects. Summary of the invention

[0005] The purpose of the present application is to provide a method and system for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear, so as to overcome or alleviate at least one aspect of the known technical defects.

[0006] The technical solution of this application is:

[0007] On the one hand, a method for determining a landing plunger load of a single-chamber oil-gas hybrid landing gear is provided, comprising:

[0008] The steps of constructing the aircraft landing gear drop shock dynamics simulation model are as follows: constructing the aircraft landing gear drop shock dynamics simulation model;

[0009] The steps of constructing the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer are as follows: constructing the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer;

[0010] The steps of establishing coupled simulation: establishing the aircraft landing gear drop shock dynamics simulation model and the coupled simulation of the single-chamber oil-gas hybrid landing gear buffer hydraulic model;

[0011] Coupling simulation calculation steps: using the aircraft landing gear drop shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model to perform coupling simulation to obtain the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer;

[0012] The steps for calculating the plunger load of a single-chamber oil-gas hybrid landing gear buffer are as follows: the plunger load is calculated using the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

[0013] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination method, in the step of constructing an aircraft landing gear drop dynamics simulation model, the constructed aircraft landing gear drop dynamics simulation model includes various landing gear components, body mass points, and the ground. Sliding pairs and rotating pairs are established between the various components to simulate the connection relationship between the various parts, and the tire and ground properties are set.

[0014] Optionally, in the above-mentioned method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear, in the step of constructing a hydraulic model of a single-chamber oil-gas hybrid landing gear buffer, the constructed hydraulic model of the single-chamber oil-gas hybrid landing gear buffer includes two hydraulic cylinders and one hydraulic cylinder, wherein the volumes of the two hydraulic cylinders are connected by two throttle holes that are connected in parallel and flow in reverse directions to simulate the flow of oil between the oil chamber and the air chamber, and a hydraulic cylinder and a hydraulic cylinder are connected by force to simulate the load transfer between the oil chamber and the air chamber.

[0015] Optionally, in the above-mentioned method for determining the landing plunger load of the single-chamber oil-gas hybrid landing gear, in the step of constructing the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer, a heat exchange element is set between the volume of the hydraulic cylinder connected to the hydraulic cylinder force and the volume of the hydraulic cylinder to simulate heat conduction between the oil and the gas.

[0016] Optionally, in the above-mentioned method for determining the landing plunger load of the single-chamber oil-gas hybrid landing gear, in the coupling simulation establishment step, a coupling simulation of the aircraft landing gear landing shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model is established through the data exchange interface of the dynamics simulation software and the hydraulic simulation software, including control input, control output, and electromechanical coupling simulation settings, wherein,

[0017] The control input is to input the buffer compression parameter in the aircraft landing gear drop dynamics simulation model into the single-chamber oil-gas hybrid landing gear buffer hydraulic model;

[0018] The control output is to output the buffer load parameters in the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer to the aircraft landing gear drop shock dynamics simulation model;

[0019] The electromechanical coupling simulation is to use the single-chamber oil-gas hybrid landing gear buffer hydraulic model in the aircraft landing gear drop dynamics simulation model for simulation.

[0020] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination method, in the single-chamber oil-gas hybrid landing gear buffer plunger load calculation step, the plunger load is calculated as the air chamber pressure P of the single-chamber oil-gas hybrid landing gear buffer using the air chamber pressure and the oil chamber pressure. 气 -Oil chamber pressure P 油 .

[0021] On the other hand, a single-chamber oil-gas hybrid landing gear landing plunger load determination system is provided, comprising:

[0022] Aircraft landing gear drop shock dynamics simulation model building module, used to build an aircraft landing gear drop shock dynamics simulation model;

[0023] A single-chamber oil-gas hybrid landing gear buffer hydraulic model building module is used to build a single-chamber oil-gas hybrid landing gear buffer hydraulic model;

[0024] The coupling simulation establishment module is used to establish the aircraft landing gear drop shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model coupling simulation;

[0025] A coupling simulation calculation module is used to perform coupling simulation with an aircraft landing gear drop dynamics simulation model and a single-chamber oil-gas hybrid landing gear buffer hydraulic model to obtain the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer;

[0026] The single-chamber oil-gas hybrid landing gear buffer plunger load calculation module is used to calculate the plunger load based on the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

[0027] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the aircraft landing gear drop dynamics simulation model construction module, the aircraft landing gear drop dynamics simulation model constructed includes various landing gear components, body mass points, and the ground. Sliding pairs and rotating pairs are established between the various components to simulate the connection relationship between the various parts, and the tire and ground properties are set.

[0028] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the single-chamber oil-gas hybrid landing gear buffer hydraulic model construction module, the single-chamber oil-gas hybrid landing gear buffer hydraulic model constructed includes two hydraulic cylinders and one hydraulic cylinder, wherein the volumes of the two hydraulic cylinders are connected by two throttle holes that are connected in parallel and flow in reverse directions to simulate the flow of oil between the oil chamber and the air chamber, and a hydraulic cylinder and a hydraulic cylinder are connected by force to simulate the load transfer between the oil chamber and the air chamber.

[0029] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the single-chamber oil-gas hybrid landing gear buffer hydraulic model construction module, a single-chamber oil-gas hybrid landing gear buffer hydraulic model is constructed, and a heat exchange element is set between the volume of the hydraulic cylinder connected to the hydraulic cylinder force and the volume of the hydraulic cylinder to simulate heat conduction between oil and gas.

[0030] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the coupling simulation establishment module, a coupling simulation of the aircraft landing gear landing shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model is established through the data exchange interface of the dynamics simulation software and the hydraulic simulation software, including control input, control output, and electromechanical coupling simulation settings, wherein,

[0031] The control input is to input the buffer compression parameter in the aircraft landing gear drop dynamics simulation model into the single-chamber oil-gas hybrid landing gear buffer hydraulic model;

[0032] The control output is to output the buffer load parameters in the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer to the aircraft landing gear drop shock dynamics simulation model;

[0033] The electromechanical coupling simulation is to use the single-chamber oil-gas hybrid landing gear buffer hydraulic model in the aircraft landing gear drop dynamics simulation model for simulation.

[0034] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the single-chamber oil-gas hybrid landing gear buffer plunger load calculation module, the plunger load is calculated as the air chamber pressure P according to the air chamber pressure and the oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer. 气 -Oil chamber pressure P 油 .

[0035] This application has at least the following beneficial technical effects:

[0036] A method and system for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear are provided. The idea is simple and clear, and it is convenient to accurately calculate the landing plunger load of the single-chamber oil-gas hybrid landing gear. Compared with the existing method, the dynamic change process of the plunger load can be calculated with high accuracy, which can provide effective input for the strength design of the plunger structure, help the detailed design of the plunger, and help to accurately calculate and assess the strength and weight reduction calculation of the plunger. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the internal buffer of a single-chamber oil-gas hybrid landing gear;

[0038] Figure 2 is a schematic diagram of a method for determining a landing plunger load of a single-chamber oil-gas hybrid landing gear provided in an embodiment of the present application;

[0039] Figure 3 is a schematic diagram of a landing gear drop dynamics simulation model for an aircraft provided in an embodiment of the present application;

[0040] Figure 4 is a schematic diagram of a hydraulic model of a single-chamber oil-gas hybrid landing gear buffer provided in an embodiment of the present application;

[0041] Figure 5 It is a schematic diagram of setting parameters input from an aircraft landing gear drop dynamics simulation model to a single-chamber oil-gas hybrid landing gear buffer hydraulic model provided by an embodiment of the present application;

[0042] Figure 6 is a schematic diagram of the electromechanical coupling input and output port configuration provided by an embodiment of the present application;

[0043] Figure 7 is a schematic diagram of the coupling simulation control output port setting provided in an embodiment of the present application;

[0044] Figure 8 It is a schematic diagram of the time domain variation curves of the air cavity pressure and the oil cavity pressure of the single-cavity oil-gas hybrid landing gear buffer obtained by the coupling simulation provided in the embodiment of the present application;

[0045] Fig. 9 It is a schematic diagram of a stroke variation curve of a single-chamber oil-gas hybrid landing gear buffer obtained by coupling simulation provided in an embodiment of the present application;

[0046] Fig.10 is a schematic diagram of a plunger load curve of a single-chamber oil-gas hybrid landing gear buffer provided in an embodiment of the present application;

[0047] Fig.11 It is a schematic diagram of a single-chamber oil-gas hybrid landing gear landing plunger load determination system provided in an embodiment of the present application.

[0048] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0049] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0050] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0051] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0052] The present application provides a method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear. Figure 2 shown.

[0053] Steps for constructing an aircraft landing gear drop shock dynamics simulation model: Construct an aircraft landing gear drop shock dynamics simulation model.

[0054] The aircraft landing gear drop dynamics simulation model includes the landing gear components, body mass points, and the ground. Sliding pairs, rotating pairs, and other kinematic pairs are established between the components to simulate the connection relationship between the parts, and the tire and ground properties are set. However, there is no need to use functions to represent the internal load of the buffer.

[0055] In a specific example, a dynamics simulation model of an aircraft landing gear drop shock is constructed using dynamics simulation software, such as Figure 3 shown.

[0056] Steps for constructing the hydraulic model of a single-chamber oil-gas hybrid landing gear buffer: Construct a hydraulic model of a single-chamber oil-gas hybrid landing gear buffer.

[0057] The hydraulic model of the single-chamber oil-gas hybrid landing gear buffer is equipped with two hydraulic cylinders and one hydraulic air cylinder, wherein the volumes of the two hydraulic cylinders are connected by two throttle holes that are connected in parallel and flow in opposite directions to each other to simulate the flow of oil between the oil chamber and the air chamber, and a hydraulic cylinder and a hydraulic air cylinder are connected by force to simulate the load transfer between the oil chamber and the air chamber.

[0058] In the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer, a heat exchange element can be set between the volume of the hydraulic cylinder connected to the hydraulic cylinder force and the volume of the hydraulic cylinder to simulate the heat conduction between the oil and the gas. In addition, temperature and pressure measuring points, control points, etc. can be set at various locations of the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer.

[0059] In a specific example, a hydraulic model of a single-chamber oil-gas hybrid landing gear buffer is constructed using hydraulic simulation software, such as Figure 4 shown.

[0060] Steps for establishing coupled simulation: Establish a coupled simulation of the aircraft landing gear drop dynamics simulation model and a single-chamber oil-gas hybrid landing gear buffer hydraulic model.

[0061] Through the data exchange interface of the dynamics simulation software and the hydraulic simulation software, a coupling simulation of the aircraft landing gear drop dynamics simulation model and the single-cavity oil-gas hybrid landing gear buffer hydraulic model is established, including control input, control output, and electromechanical coupling simulation settings, wherein the control input is to input the buffer compression parameter in the aircraft landing gear drop dynamics simulation model into the single-cavity oil-gas hybrid landing gear buffer hydraulic model; the control output is to output the buffer load parameter in the single-cavity oil-gas hybrid landing gear buffer hydraulic model into the aircraft landing gear drop dynamics simulation model; the electromechanical coupling simulation is to call the single-cavity oil-gas hybrid landing gear buffer hydraulic model in the aircraft landing gear drop dynamics simulation model for simulation.

[0062] In a specific example, the parameters of the single-chamber oil-gas hybrid landing gear buffer hydraulic model are first set in the aircraft landing gear drop dynamics simulation model, and the relative displacement between the outer cylinder and the piston rod is selected, such as Figure 5 As shown, then set the electromechanical coupling, select the single-chamber oil-gas hybrid landing gear buffer hydraulic model, select the relative displacement set in the previous step in the input port, and the hydraulic load of the selected single-chamber oil-gas hybrid landing gear buffer hydraulic model will be automatically selected in the output parameters, as shown in Figure 6As shown, finally set the control output and select the electromechanical coupling set in the previous step, such as Figure 7 When performing coupled simulation, the single-chamber oil-gas hybrid landing gear buffer hydraulic model will be run first, and then coupled simulation will be performed in the aircraft landing gear drop dynamics simulation model interface to obtain the results.

[0063] Coupling simulation calculation steps: using the aircraft landing gear drop dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model to perform coupling simulation to obtain the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

[0064] In a specific example, the coupled simulation obtains the air chamber pressure P of the single-chamber oil-air hybrid landing gear buffer. 气 , oil chamber pressure P 油 Time domain variation curve, such as Figure 8 As shown in the figure, the stroke variation curve of the buffer is as follows: Fig. 9 As shown.

[0065] The steps for calculating the plunger load of a single-chamber oil-gas hybrid landing gear buffer are as follows: the plunger load is calculated using the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

[0066] The plunger load of the single-chamber oil-air hybrid landing gear buffer is the air chamber pressure P 气 -Oil chamber pressure P 油 .

[0067] In a specific example, the plunger load curve of a single-chamber oil-air hybrid landing gear buffer changes, such as Fig.10 As shown, the maximum pressure difference between the air chamber and the oil chamber during the positive stroke and the reverse stroke can be obtained respectively, which is the design load of different parts of the plunger. It can be obtained that the maximum pressure difference between the oil chamber and the air chamber during the positive stroke is 5.29MPa, and the maximum pressure difference between the air chamber and the oil chamber during the reverse stroke is 1.34MPa.

[0068] The method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear disclosed in the above-mentioned embodiment is simple and clear in concept, and is convenient for accurately calculating the landing plunger load of a single-chamber oil-gas hybrid landing gear. Compared with the existing method, the dynamic change process of the plunger load can be calculated with high accuracy, and can provide effective input for the strength design of the plunger structure, which is helpful for the detailed design of the plunger and helps to accurately calculate and assess the strength and weight reduction calculation of the plunger.

[0069] On the other hand, a single-chamber oil-gas hybrid landing gear landing plunger load determination system is provided, such as Fig.11 As shown, including:

[0070] Aircraft landing gear drop shock dynamics simulation model building module, used to build an aircraft landing gear drop shock dynamics simulation model;

[0071] A single-chamber oil-gas hybrid landing gear buffer hydraulic model building module is used to build a single-chamber oil-gas hybrid landing gear buffer hydraulic model;

[0072] The coupling simulation establishment module is used to establish the aircraft landing gear drop shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model coupling simulation;

[0073] A coupling simulation calculation module is used to perform coupling simulation with an aircraft landing gear drop dynamics simulation model and a single-chamber oil-gas hybrid landing gear buffer hydraulic model to obtain the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer;

[0074] The single-chamber oil-gas hybrid landing gear buffer plunger load calculation module is used to calculate the plunger load based on the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

[0075] Furthermore, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the aircraft landing gear drop dynamics simulation model construction module, the aircraft landing gear drop dynamics simulation model constructed includes various landing gear components, body mass points, and the ground. Sliding pairs and rotating pairs are established between the various components to simulate the connection relationship between the various parts, and the tire and ground properties are set.

[0076] Furthermore, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the single-chamber oil-gas hybrid landing gear buffer hydraulic model construction module, the single-chamber oil-gas hybrid landing gear buffer hydraulic model constructed includes two hydraulic cylinders and one hydraulic cylinder, wherein the volumes of the two hydraulic cylinders are connected by two throttle holes that are connected in parallel and flow in reverse to each other to simulate the flow of oil between the oil chamber and the air chamber, and a hydraulic cylinder and a hydraulic cylinder are connected by force to simulate the load transfer between the oil chamber and the air chamber.

[0077] Furthermore, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the single-chamber oil-gas hybrid landing gear buffer hydraulic model construction module, a single-chamber oil-gas hybrid landing gear buffer hydraulic model is constructed, and a heat exchange element is set between the volume of the hydraulic cylinder connected to the hydraulic cylinder force and the volume of the hydraulic cylinder to simulate the heat conduction between the oil and the gas.

[0078] Optionally, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the coupling simulation establishment module, a coupling simulation of the aircraft landing gear landing shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model is established through the data exchange interface of the dynamics simulation software and the hydraulic simulation software, including control input, control output, and electromechanical coupling simulation settings, wherein,

[0079] The control input is to input the buffer compression parameter in the aircraft landing gear drop shock dynamics simulation model into the single-chamber oil-gas hybrid landing gear buffer hydraulic model;

[0080] The control output is to output the buffer load parameters in the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer to the aircraft landing gear drop shock dynamics simulation model;

[0081] The electromechanical coupling simulation is to use the single-chamber oil-gas hybrid landing gear buffer hydraulic model in the aircraft landing gear drop dynamics simulation model for simulation.

[0082] Furthermore, in the above-mentioned single-chamber oil-gas hybrid landing gear landing plunger load determination system, in the single-chamber oil-gas hybrid landing gear buffer plunger load calculation module, the plunger load is calculated as the air chamber pressure P of the single-chamber oil-gas hybrid landing gear buffer using the air chamber pressure and the oil chamber pressure. 气 -Oil chamber pressure P 油 .

[0083] As for the single-chamber oil-gas hybrid landing gear landing plunger load determination system disclosed in the above embodiment, since it corresponds to the single-chamber oil-gas hybrid landing gear landing plunger load determination method disclosed in the above embodiment, the description is relatively simple. For specific related matters, please refer to the relevant description of the single-chamber oil-gas hybrid landing gear landing plunger load determination method part. Its technical effects can also refer to the technical effects of the relevant parts of the single-chamber oil-gas hybrid landing gear landing plunger load determination method, which will not be repeated here.

[0084] In addition, technicians in the field should also be able to realize that the various modules and units of the single-chamber oil-gas hybrid landing gear landing plunger load determination system disclosed in the embodiments of the present application can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, this application generally describes them according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Technicians in the field can choose to adopt different methods to implement the described functions for each specific application and its actual constraints, but such implementation should not be considered to be beyond the scope of this application.

[0085] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear, characterized in that: include: The steps of constructing the aircraft landing gear drop shock dynamics simulation model are as follows: constructing the aircraft landing gear drop shock dynamics simulation model; The steps of constructing the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer are as follows: constructing the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer; The steps of establishing coupled simulation: establishing the aircraft landing gear drop shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model coupled simulation; Coupling simulation calculation steps: using the aircraft landing gear drop shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model to perform coupling simulation to obtain the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer; The steps for calculating the plunger load of a single-chamber oil-gas hybrid landing gear buffer are as follows: the plunger load is calculated using the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

2. The method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear according to claim 1, characterized in that: In the step of constructing an aircraft landing gear drop dynamics simulation model, an aircraft landing gear drop dynamics simulation model is constructed, including various landing gear components, body mass points, and the ground. Sliding pairs and rotating pairs are established between various components to simulate the connection relationship between various parts, and tire and ground properties are set.

3. The method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear according to claim 2, characterized in that: In the step of constructing the hydraulic model of a single-chamber oil-gas hybrid landing gear buffer, the constructed hydraulic model of a single-chamber oil-gas hybrid landing gear buffer includes two hydraulic cylinders and one hydraulic air cylinder, wherein the volumes of the two hydraulic cylinders are connected by two throttle holes that are connected in parallel and flow in opposite directions to each other to simulate the flow of oil between the oil chamber and the air chamber, and a hydraulic cylinder and a hydraulic cylinder are connected by force to simulate the load transfer between the oil chamber and the air chamber.

4. The method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear according to claim 3, characterized in that: In the step of constructing the hydraulic model of a single-chamber oil-gas hybrid landing gear buffer, a heat exchange element is set between the volume of the hydraulic oil cylinder connected to the hydraulic cylinder force and the volume of the hydraulic cylinder to simulate heat conduction between oil and gas.

5. The method for determining the landing plunger load of a single-chamber oil-gas hybrid landing gear according to claim 4, characterized in that: In the coupling simulation establishment step, the coupling simulation of the aircraft landing gear drop dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model is established through the data exchange interface of the dynamics simulation software and the hydraulic simulation software, including control input, control output, and electromechanical coupling simulation settings, wherein: The control input is to input the buffer compression parameter in the aircraft landing gear drop shock dynamics simulation model into the single-chamber oil-gas hybrid landing gear buffer hydraulic model; The control output is to output the buffer load parameters in the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer to the aircraft landing gear drop shock dynamics simulation model; The electromechanical coupling simulation is to use the single-chamber oil-gas hybrid landing gear buffer hydraulic model in the aircraft landing gear drop dynamics simulation model for simulation.

6. The method for determining the landing plunger load of a single-chamber oil-air hybrid landing gear according to claim 5, characterized in that: In the calculation step of the plunger load of the single-chamber oil-gas hybrid landing gear buffer, the plunger load is calculated as the air chamber pressure P based on the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer. 气 -Oil chamber pressure P 油 .

7. A single-chamber oil-gas hybrid landing gear landing plunger load determination system, characterized in that: include: Aircraft landing gear drop shock dynamics simulation model building module, used to build an aircraft landing gear drop shock dynamics simulation model; A single-chamber oil-gas hybrid landing gear buffer hydraulic model building module is used to build a single-chamber oil-gas hybrid landing gear buffer hydraulic model; The coupling simulation establishment module is used to establish the aircraft landing gear drop shock dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model coupling simulation; A coupling simulation calculation module is used to perform coupling simulation with an aircraft landing gear drop dynamics simulation model and a single-chamber oil-gas hybrid landing gear buffer hydraulic model to obtain the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer; The single-chamber oil-gas hybrid landing gear buffer plunger load calculation module is used to calculate the plunger load based on the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer.

8. The single-chamber oil-gas hybrid landing gear landing plunger load determination system according to claim 7, characterized in that: In the aircraft landing gear drop dynamics simulation model construction module, the aircraft landing gear drop dynamics simulation model is constructed, including the landing gear components, body mass points, and the ground. Sliding pairs and rotating pairs are established between the components to simulate the connection relationship between the parts, and the tire and ground properties are set.

9. The single-chamber oil-gas hybrid landing gear landing plunger load determination system according to claim 8, characterized in that: In the single-chamber oil-gas hybrid landing gear buffer hydraulic model construction module, the constructed single-chamber oil-gas hybrid landing gear buffer hydraulic model includes two hydraulic cylinders and one hydraulic air cylinder, wherein the volumes of the two hydraulic cylinders are connected by two throttle holes that are connected in parallel and flow in reverse directions to simulate the flow of oil between the oil chamber and the air chamber, and a hydraulic cylinder and a hydraulic cylinder are connected by force to simulate the load transfer between the oil chamber and the air chamber.

10. The single-chamber oil-gas hybrid landing gear landing plunger load determination system according to claim 9, characterized in that: In the single-chamber oil-gas hybrid landing gear buffer hydraulic model construction module, a single-chamber oil-gas hybrid landing gear buffer hydraulic model is constructed, and a heat exchange element is set between the volume of the hydraulic cylinder connected to the hydraulic cylinder force and the volume of the hydraulic cylinder to simulate the heat conduction between the oil and the gas.

11. The single-chamber oil-gas hybrid landing gear landing plunger load determination system according to claim 10, characterized in that: In the coupling simulation establishment module, the coupling simulation of the aircraft landing gear drop dynamics simulation model and the single-chamber oil-gas hybrid landing gear buffer hydraulic model is established through the data exchange interface of the dynamics simulation software and the hydraulic simulation software, including control input, control output, and electromechanical coupling simulation settings. The control input is to input the buffer compression parameter in the aircraft landing gear drop shock dynamics simulation model into the single-chamber oil-gas hybrid landing gear buffer hydraulic model; The control output is to output the buffer load parameters in the hydraulic model of the single-chamber oil-gas hybrid landing gear buffer to the aircraft landing gear drop shock dynamics simulation model; The electromechanical coupling simulation is to use the single-chamber oil-gas hybrid landing gear buffer hydraulic model in the aircraft landing gear drop dynamics simulation model for simulation.

12. The single-chamber oil-gas hybrid landing gear landing plunger load determination system according to claim 11, characterized in that: In the single-chamber oil-gas hybrid landing gear buffer plunger load calculation module, the plunger load is calculated as the air chamber pressure P based on the air chamber pressure and oil chamber pressure of the single-chamber oil-gas hybrid landing gear buffer. 气 -Oil chamber pressure P 油 .

Images