Air spring type selection method, device and equipment and storage medium

Abstract

The embodiment of the invention discloses an air spring type selection method and device, equipment and a storage medium, and the method comprises the steps: carrying out the matching calculation according to suspension design parameters, and determining the initial structure parameters of a target air spring; establishing a parameterized model according to the initial structure parameters, and calculating through the parameterized model to obtain an actual displacement-effective volume change curve of the air spring; and the actual rigidity of the air spring is obtained through the actual displacement-effective volume change curve of the air spring, and model selection is conducted based on the actual rigidity of the air spring. According to the method, air spring rigidity calculation is achieved, air spring type selection matching can be carried out, the calculation mode is simple, convenient and efficient, application is wide, and the engineering application requirement can be well met.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an air spring selection method, device, electronic equipment and storage medium. Background Art

[0002] As a high-performance elastic element, air springs are widely used in vehicle suspension systems, industrial equipment shock absorption and other occasions that require precise control of stiffness and damping. The selection of air springs directly affects the dynamic performance and stability of the system. Therefore, determining the selection of air springs is a key prerequisite for the design of vehicle suspension systems.

[0003] In the prior art, the selection of air springs is generally determined by finite element calculation. However, the structure of air springs is complex and is usually composed of multiple materials such as rubber bladders, cords, and structural parts. Simulation analysis involves fluid-solid coupling, rubber formulation, material properties, various contacts, etc. Establishing a finite element analysis model is time-consuming and laborious, and requires a large amount of computing resources. The accuracy of the calculation results also requires multiple experimental verifications. The calculation procedure is complicated and the selection time is long. Summary of the invention

[0004] In view of the above problems, this specification is proposed to provide an air spring selection method, device, equipment and storage medium that overcome the above problems or at least partially solve the above problems.

[0005] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0006] In one aspect, the present invention provides a method for selecting an air spring, comprising:

[0007] Perform matching calculations based on suspension design parameters to determine the initial structural parameters of the target air spring;

[0008] Establishing a parameterized model according to the initial structural parameters, and calculating the displacement-effective volume change curve of the actual air spring through the parameterized model;

[0009] The actual stiffness of the air spring is obtained through the displacement-effective volume variation curve of the actual air spring, and the air spring is selected based on the actual stiffness of the air spring.

[0010] Furthermore, in the air spring selection method, the step of performing matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring comprises:

[0011] Determine a target stiffness of a target air spring according to the suspension deflection frequency and the sprung mass;

[0012] Setting a maximum spring load and a working air pressure, and determining an initial effective area of ​​a target air spring according to the maximum spring load and the working air pressure;

[0013] Setting a normal spring load of the suspension at a static equilibrium position, and calculating an initial apparent air pressure of a target air spring at a static equilibrium position according to the normal spring load and the initial effective area;

[0014] The initial effective volume of the target air spring at the static equilibrium position is calculated according to the target stiffness, the initial effective area and the initial apparent air pressure.

[0015] Further, in the air spring selection method, the calculation formula for determining the target stiffness of the target air spring according to the suspension offset frequency and the sprung mass is:

[0016]

[0017] Among them, c is the target stiffness, f is the suspension bias frequency, and m is the sprung mass;

[0018] The calculation formula for determining the initial effective area of ​​the target air spring according to the maximum load and the working air pressure is:

[0019] F = P1·A0;

[0020] Among them, A0 is the initial effective area, F is the maximum spring load, and P1 is the working air pressure;

[0021] The calculation formula for calculating the initial effective volume of the target air spring at the static equilibrium position according to the target stiffness, the initial effective area and the initial apparent air pressure is:

[0022]

[0023] Among them, V0 is the initial effective volume at the static equilibrium position, C0=C is the target stiffness, dF is the load increment, dx is the deformation increment, P0 is the initial apparent air pressure corresponding to the static equilibrium position, P a is standard atmospheric pressure, is the partial derivative, and m is the polynomial exponent.

[0024] Furthermore, in the air spring selection method, the step of establishing a parameterized model according to the initial structural parameters and calculating the displacement-effective volume change curve of the actual air spring through the parameterized model comprises:

[0025] Using an inertia measurement tool to measure the volume parameters of the parameterized model under different displacement parameters;

[0026] The plurality of displacement parameters and the plurality of volume parameters are fitted to obtain the displacement-effective volume change curve.

[0027] Furthermore, in the air spring selection method, the step of obtaining the actual stiffness of the air spring through the displacement-effective volume change curve of the actual air spring comprises:

[0028] Derivation of a displacement-effective area change curve based on the displacement-effective volume change curve;

[0029] Based on the displacement-effective volume change curve and the displacement-effective area change curve, the actual stiffness of the actual air spring at the calculation position is calculated.

[0030] Furthermore, in the air spring selection method, after the step of calculating the actual stiffness of the actual air spring at the calculation position based on the displacement-effective volume change curve and the displacement-effective area change curve, the method further includes:

[0031] The actual stiffness of multiple different calculation positions is fitted to obtain the actual air spring characteristic curve.

[0032] Further, in the air spring selection method, the calculation formula for calculating the actual stiffness of the actual air spring at the calculation position based on the displacement-effective area change curve and the displacement-effective area change curve is:

[0033]

[0034] Among them, C X is the actual stiffness, P a is standard atmospheric pressure, P r To calculate the apparent air pressure corresponding to the position, V r is the effective volume corresponding to the calculated position, P0 is the initial apparent pressure corresponding to the static equilibrium position, V o is the initial effective volume corresponding to the static equilibrium position, A r To calculate the effective area corresponding to the position, is the partial derivative, and m is the polynomial exponent.

[0035] Another aspect of the present invention provides an air spring stiffness calculation device, comprising:

[0036] A first calculation module is used to perform matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring;

[0037] A second calculation module is used to establish a parameterized model according to the initial structural parameters, and calculate the displacement-effective volume change curve of the actual air spring through the parameterized model;

[0038] The third calculation module is used to obtain the actual stiffness of the air spring through the displacement-effective volume change curve of the actual air spring, and select the air spring based on the actual stiffness of the air spring.

[0039] On the other hand, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the air spring selection method described in the above technical solution when executing the computer program.

[0040] On the other hand, the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the air spring selection method described in the above technical solution is implemented.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The target air spring structural parameters are obtained through suspension design parameter matching calculation and a parametric model is established. Then, the stiffness of the actual air spring is calculated based on the parametric model. While realizing the air spring stiffness calculation, the air spring selection and matching can also be performed. The calculation method is simple, convenient, efficient, and widely used, and can better meet the requirements of engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It is a flow chart of the air spring selection method provided in the embodiment of the present application;

[0045] Figure 2 is a displacement-effective volume change curve provided in an embodiment of the present application;

[0046] Figure 3 is a displacement-effective area change curve provided in an embodiment of the present application;

[0047] Figure 4 is a characteristic curve diagram of an air spring provided in an embodiment of the present application;

[0048] Figure 5 is a structural schematic diagram of an air spring stiffness calculation device provided in an embodiment of the present application;

[0049] Figure 6 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0051] It should be noted that an air spring is a spring filled with compressed air in a retractable closed container, which uses the elasticity of air. The working principle is to use the repulsive force of compressed air and the elasticity of rubber to achieve the effect of shock absorption and support. When compressed air is filled in a sealed container, as the vibration load increases, the height of the spring decreases, the volume of the inner cavity decreases, the stiffness of the spring increases, and the effective bearing area of ​​the air column in the inner cavity increases. At this time, the bearing capacity of the spring increases. Conversely, when the vibration load decreases, the height of the spring increases, the volume of the inner cavity increases, the stiffness of the spring decreases, and the bearing capacity also decreases. The stiffness of the air spring directly affects the dynamic performance of the entire system. By calculating the stiffness, engineers can predict the response of the system when it is subjected to external excitation (such as uneven road surface, vibration, etc.), thereby optimizing the stability and comfort of the system.

[0052] The stiffness of the air spring is determined by the initial inflation pressure, atmospheric pressure, polynomial index, design position height, design position volume, relative volume of the air spring, effective area and its rate of change, volume and its rate of change. The process of solving the stiffness is the process of solving each parameter.

[0053] First embodiment

[0054] See also Figure 1 , is the air spring selection method in the first embodiment of the present invention, including steps S11-S13.

[0055] S11, performing matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring.

[0056] The stiffness of the air spring comes from its own structural dimensions, and the structural dimensions of the air spring need to be based on the suspension design. Therefore, this application performs matching calculations based on the suspension design input parameters, and while obtaining the initial structural parameters of the target air spring, it can also achieve air spring selection matching.

[0057] Specifically, the step of performing matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring includes:

[0058] S11-1, determining a target stiffness of a target air spring according to the suspension frequency deviation and the sprung mass;

[0059] It should be noted that according to the load, frequency deviation and stiffness requirements of the suspension, we can preliminarily obtain the target stiffness required by the air spring. The formula involved here is:

[0060]

[0061] Where c is the target stiffness, f is the suspension bias frequency, and m is the sprung mass.

[0062] S11-2, setting a maximum spring load and a working air pressure, and determining an initial effective area of ​​a target air spring according to the maximum spring load and the working air pressure;

[0063] It should be noted that the maximum spring load is determined by the actual vehicle parameters. Specifically, the maximum spring load is equal to the sum of the spring load and the impact load when the vehicle is fully loaded. The working air pressure is set based on experience. After obtaining the maximum spring load and working air pressure, we can derive the initial effective area of ​​the target air spring. The formula involved here is:

[0064] F = P1·A0;

[0065] Among them, A0 is the initial effective area, F is the maximum spring load, and P1 is the working air pressure.

[0066] S11-3, setting a normal spring load of the suspension at a static equilibrium position, and calculating an initial apparent air pressure of the target air spring at the static equilibrium position according to the normal spring load and the initial effective area;

[0067] Specifically, the normal spring load is the load received by the air spring when the vehicle is in a static equilibrium position. The normal spring load is determined based on vehicle body parameters. By substituting the normal load into the formula involved in step S11-2, the initial apparent air pressure of the target air spring in the static equilibrium position can be obtained.

[0068] S11-4, calculating the initial effective volume of the target air spring at the static equilibrium position according to the target stiffness, the initial effective area and the initial apparent air pressure.

[0069] It is understandable that since the stiffness of the air spring is related to its effective volume, apparent air pressure, effective area and polynomial index, after obtaining the target stiffness, initial effective area and initial apparent air pressure, we can reversely deduce the initial effective volume of the air spring in the static equilibrium state. The formula involved here is:

[0070]

[0071] Among them, V0 is the initial effective volume at the static equilibrium position, C0=C is the target stiffness, dF is the load increment, dx is the deformation increment (the change in the axial displacement of the air spring), P0 is the initial apparent air pressure corresponding to the static equilibrium position, Pa is standard atmospheric pressure, is the partial derivative, and m is the polynomial exponent.

[0072] It should be noted that the suspension bias frequency mentioned above refers to the frequency of natural vibration of the suspension system when there is no external forced vibration. It describes the vibration characteristics of the suspension system itself, which is mainly determined by the stiffness of the suspension (including springs and shock absorbers) and the sprung mass; the sprung mass refers to the mass supported by the elastic elements (air springs) in the suspension system of the vehicle, generally including the frame, power system, transmission, passengers, etc.; the normal sprung load refers to the load borne by the air spring when the vehicle is in the static balance position. This load is determined based on the body parameters, and it reflects the weight borne by the suspension system of the vehicle when it is stationary.

[0073] S12, establishing a parameterized model according to the initial structural parameters, and calculating a displacement-effective volume change curve of an actual air spring through the parameterized model;

[0074] In this embodiment, after the initial structural parameters of the target air spring are obtained, a parameterized model is established using Catia, the main purpose of which is to obtain the corresponding relationship between the displacement and volume of the air spring required for calculation through the parameterized model.

[0075] Specifically, the step of establishing a parameterized model according to the initial structural parameters and calculating the displacement-effective volume change curve of the actual air spring by using the parameterized model includes:

[0076] S12-1, using an inertia measurement tool to measure the volume parameters of the parameterized model corresponding to different displacement parameters;

[0077] In this step, the air spring volume is measured mainly by using the inertia measurement function in Catia, and then the air spring stroke parameters are adjusted, and the air spring volume is continued to be measured until multiple sets of displacement parameters and volume parameters are obtained.

[0078] S12-2, fitting the plurality of displacement parameters and the plurality of volume parameters to obtain the displacement-effective volume change curve.

[0079] S13, obtaining the actual stiffness of the air spring through the displacement-effective volume variation curve of the actual air spring, and selecting the air spring based on the actual stiffness of the air spring.

[0080] Specifically, the step of obtaining the actual stiffness of the air spring through the displacement-effective volume change curve of the actual air spring includes:

[0081] S13-1, deriving a displacement-effective area change curve according to the displacement-effective volume change curve;

[0082] In this embodiment, after obtaining the displacement-effective volume change curve, the displacement-effective area change curve of the air spring can be further derived through the volume calculation formula of the airbag. It should be noted that this derivation process may involve some assumptions and simplifications, such as assuming that the deformation of the air spring is uniform, or ignoring some minor factors. These assumptions and simplifications are usually for the convenience of calculation and understanding, but in actual applications, they may need to be verified and adjusted in combination with experimental data.

[0083] S13-2, based on the displacement-effective volume change curve and the displacement-effective area change curve, calculate the actual stiffness of the actual air spring at the calculated position.

[0084] After obtaining the displacement-effective volume change curve and the displacement-effective area change curve, we can calculate the actual stiffness of the actual air spring at the calculation position based on these two curves. Specifically, we can select a specific point on the curve (i.e. the calculation position), and then read the effective volume and effective area values ​​corresponding to that point. Next, we can use the stiffness calculation formula of the air spring (usually related to the pressure, effective area and volume change of the gas) to calculate the stiffness of that point.

[0085] Through this process, we can obtain the stiffness value of the actual air spring under different displacements, which provides an important reference for the subsequent suspension system design and optimization.

[0086] Specifically, the calculation formula for calculating the actual stiffness of the actual air spring at the calculation position based on the displacement-effective area change curve and the displacement-effective area change curve is:

[0087]

[0088] Among them, C X is the actual stiffness, P a is standard atmospheric pressure, P r To calculate the apparent air pressure corresponding to the position, V r is the effective volume corresponding to the calculated position, P0 is the initial apparent pressure corresponding to the static equilibrium position, V o is the initial effective volume corresponding to the static equilibrium position, A r To calculate the effective area corresponding to the position, is the partial derivative, and m is the polytropic index (m is 1 for isothermal process, and m is 1.35 for adiabatic process).

[0089] Furthermore, after the step of calculating the actual stiffness of the actual air spring at the calculation position based on the displacement-effective volume change curve and the displacement-effective area change curve, the method further includes:

[0090] S14, fitting the actual stiffness of multiple different calculation positions to obtain an actual air spring characteristic curve.

[0091] For example, in one implementation of this embodiment, the displacement-effective volume change curve, displacement-effective area change curve and air spring characteristic curve finally measured by the air spring can be referred to Figure 2-Figure 4 .

[0092] In addition, this embodiment can also write a calculation program based on the Matlab GUI programming environment for the above steps S11-S13 to achieve empty spring matching and stiffness calculation, so that the user only needs to input parameters and click the mouse to perform relevant calculations of the empty spring. This method is simple to operate, easy to use, and highly practical, and meets engineering requirements.

[0093] In summary, the target air spring structural parameters are obtained through suspension design parameter matching calculation and a parametric model is established. Then, the stiffness of the actual air spring is calculated based on the parametric model. While the air spring stiffness calculation is realized, the air spring selection and matching can also be performed. The calculation method is simple, convenient, efficient, and widely used, and can better meet the requirements of engineering applications.

[0094] Second embodiment

[0095] See also Figure 5 , shown is an air spring stiffness calculation device in a second embodiment of the present invention, comprising:

[0096] A first calculation module 100 is used to perform matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring;

[0097] A second calculation module 200 is used to establish a parameterized model according to the initial structural parameters, and calculate the displacement-effective volume change curve of the actual air spring through the parameterized model;

[0098] The third calculation module 300 is used to obtain the actual stiffness of the air spring through the displacement-effective volume change curve of the actual air spring, and select the air spring based on the actual stiffness of the air spring.

[0099] Furthermore, the first calculation module 100 includes:

[0100] A target stiffness setting unit, used for determining a target stiffness of a target air spring according to a suspension bias frequency and a sprung mass;

[0101] an initial effective area determination unit, used to set a maximum spring load and a working air pressure, and determine an initial effective area of ​​a target air spring according to the maximum spring load and the working air pressure;

[0102] An initial apparent air pressure measuring unit is used to set a normal spring load of the suspension at a static equilibrium position, and calculate an initial apparent air pressure of a target air spring at a static equilibrium position according to the normal spring load and the initial effective area;

[0103] The initial effective volume determination unit is used to calculate the initial effective volume of the target air spring at the static equilibrium position according to the target stiffness, the initial effective area and the initial apparent air pressure.

[0104] Furthermore, the second calculation module 200 includes:

[0105] An inertia measurement unit, used to measure the volume parameters corresponding to the parameterized model under different displacement parameters using an inertia measurement tool;

[0106] The first fitting unit is used to fit the plurality of displacement parameters and the plurality of volume parameters to obtain the displacement-effective volume change curve.

[0107] Furthermore, the third calculation module 300 includes:

[0108] A derivation unit, used for derivation of a displacement-effective area change curve according to the displacement-effective volume change curve;

[0109] The stiffness calculation unit is used to calculate the actual stiffness of the actual air spring at the calculation position based on the displacement-effective volume change curve and the displacement-effective area change curve.

[0110] Furthermore, the device also includes:

[0111] The second fitting unit is used to fit the actual stiffness of multiple different calculation positions to obtain an actual air spring characteristic curve.

[0112] The functions of the device in the embodiment of the present invention have been described in the above method embodiment, so for details not provided in the description of this embodiment, please refer to the relevant description in the above embodiment, and no further description will be given here.

[0113] The present invention also provides an electronic device, see Figure 6 , shown is an electronic device in the third embodiment of the present invention, including a memory 10, a processor 20, and a computer program 30 stored in the memory 10 and executable on the processor 20, and the processor 20 implements the above-mentioned air spring selection method when executing the computer program 30.

[0114] Among them, the memory 10 includes at least one type of storage medium, and the storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 10 can be an internal storage unit of an electronic device, such as a hard disk of the electronic device. In other embodiments, the memory 10 can also be an external storage device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Further, the memory 10 can also include both an internal storage unit of the electronic device and an external storage device. The memory 10 can not only be used to store application software and various types of data installed in the electronic device, but also can be used to temporarily store data that has been output or is to be output.

[0115] Among them, in some embodiments, the processor 20 can be an electronic control unit (Electronic Control Unit, abbreviated as ECU, also known as a vehicle computer), a central processing unit (Central Processing Unit, CPU), a controller, a microcontroller, a microprocessor or other data processing chip, used to run the program code stored in the memory 10 or process data, such as executing access restriction programs, etc.

[0116] It should be pointed out that Figure 6 The structure shown does not constitute a limitation on the electronic device. In other embodiments, the electronic device may include fewer or more components than those shown in the figure, or combine certain components, or arrange the components differently.

[0117] The fourth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the air spring selection method as described above is implemented.

[0118] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0119] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0120] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0122] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for selecting an air spring, characterized in that: include: Perform matching calculations based on suspension design parameters to determine the initial structural parameters of the target air spring; Establishing a parameterized model according to the initial structural parameters, and calculating the displacement-effective volume change curve of the actual air spring through the parameterized model; The actual stiffness of the air spring is obtained through the displacement-effective volume variation curve of the actual air spring, and the air spring is selected based on the actual stiffness of the air spring.

2. The air spring selection method according to claim 1, characterized in that: The step of performing matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring comprises: Determine a target stiffness of a target air spring according to the suspension deflection frequency and the sprung mass; Setting a maximum spring load and a working air pressure, and determining an initial effective area of ​​a target air spring according to the maximum spring load and the working air pressure; Setting a normal spring load of the suspension at a static equilibrium position, and calculating an initial apparent air pressure of a target air spring at a static equilibrium position according to the normal spring load and the initial effective area; The initial effective volume of the target air spring at the static equilibrium position is calculated according to the target stiffness, the initial effective area and the initial apparent air pressure.

3. The air spring selection method according to claim 2, characterized in that: The calculation formula for determining the target stiffness of the target air spring according to the suspension offset frequency and the sprung mass is: Among them, c is the target stiffness, f is the suspension bias frequency, and m is the sprung mass; The calculation formula for determining the initial effective area of ​​the target air spring according to the maximum load and the working air pressure is: F = P1·A0; Among them, A0 is the initial effective area, F is the maximum spring load, and P1 is the working air pressure; The calculation formula for calculating the initial effective volume of the target air spring at the static equilibrium position according to the target stiffness, the initial effective area and the initial apparent air pressure is: Among them, V0 is the initial effective volume at the static equilibrium position, C0=C is the target stiffness, dF is the load increment, dx is the deformation increment, P0 is the initial apparent air pressure corresponding to the static equilibrium position, P a is standard atmospheric pressure, is the partial derivative, and m is the polynomial exponent.

4. The air spring selection method according to claim 1, characterized in that: The step of establishing a parameterized model according to the initial structural parameters and calculating the displacement-effective volume change curve of the actual air spring through the parameterized model comprises: Using an inertia measurement tool to measure the volume parameters of the parameterized model under different displacement parameters; The plurality of displacement parameters and the plurality of volume parameters are fitted to obtain the displacement-effective volume change curve.

5. The air spring selection method according to claim 4, characterized in that: The step of obtaining the actual stiffness of the air spring through the displacement-effective volume change curve of the actual air spring comprises: Derivation of a displacement-effective area change curve based on the displacement-effective volume change curve; Based on the displacement-effective volume change curve and the displacement-effective area change curve, the actual stiffness of the actual air spring at the calculation position is calculated.

6. The air spring selection method according to claim 5, characterized in that: After the step of calculating the actual stiffness of the actual air spring at the calculation position based on the displacement-effective volume change curve and the displacement-effective area change curve, the method further includes: The actual stiffness of multiple different calculation positions is fitted to obtain the actual air spring characteristic curve.

7. The air spring selection method according to claim 5, characterized in that: The calculation formula for calculating the actual stiffness of the actual air spring at the calculation position based on the displacement-effective area change curve and the displacement-effective area change curve is: Among them, C X is the actual stiffness, P a is standard atmospheric pressure, P r To calculate the apparent air pressure corresponding to the position, V r is the effective volume corresponding to the calculated position, P0 is the initial apparent pressure corresponding to the static equilibrium position, V o is the initial effective volume corresponding to the static equilibrium position, A r To calculate the effective area corresponding to the position, is the partial derivative, and m is the polynomial exponent.

8. An air spring stiffness calculation device, characterized in that: include: A first calculation module is used to perform matching calculation according to the suspension design parameters to determine the initial structural parameters of the target air spring; A second calculation module is used to establish a parameterized model according to the initial structural parameters, and calculate the displacement-effective volume change curve of the actual air spring through the parameterized model; The third calculation module is used to obtain the actual stiffness of the air spring through the displacement-effective volume change curve of the actual air spring, and select the air spring based on the actual stiffness of the air spring.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the air spring selection method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the air spring selection method according to any one of claims 1 to 7 is implemented.

Images