Methods, apparatus, vehicles and storage media for generating air springs

Abstract

This invention discloses a method, apparatus, vehicle, and storage medium for generating air springs, relating to the field of vehicle technology. The method includes: acquiring multiple design parameters, wherein the multiple design parameters are used to design an air spring to be used in a pre-defined vehicle, and the multiple design parameters include at least: the piston cross-sectional shape of the air spring; determining descriptive information of the piston cross-sectional shape based on its deformation properties; calculating the air spring stiffness based on the descriptive information to obtain the air spring's stiffness properties; and generating the air spring according to the stiffness properties. This invention solves the technical problems of related technologies that use polynomial input to obtain different stiffness curves to generate air springs, resulting in complex methods that are difficult to implement, time-consuming, inefficient, lack comprehensiveness, and have low accuracy.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a method, apparatus, vehicle, and storage medium for generating air springs. Background Technology

[0002] With the rapid development of vehicle technology, air springs are being used more and more widely in vehicles, and vehicles equipped with air springs offer excellent ride comfort. Therefore, understanding the methods for manufacturing air springs is crucial.

[0003] Currently, different stiffness curves are obtained by using polynomial input to generate air springs. However, this method is complex to calculate, takes a lot of time, and has limited functionality. It cannot be applied to the stiffness calculation of air springs with variable piston cross sections, resulting in a complex, difficult-to-implement, time-consuming, inefficient, and incomplete method with low accuracy.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a method, apparatus, vehicle, and storage medium for generating air springs, at least addressing the technical problems of related technologies that generate air springs by using polynomial inputs to obtain different stiffness curves, resulting in complex methods that are difficult to implement, time-consuming, inefficient, lack comprehensiveness, and have low accuracy.

[0006] According to one embodiment of the present invention, a method for generating an air spring is provided, comprising: obtaining a plurality of design parameters, wherein the plurality of design parameters are used to design an air spring to be used in a preset vehicle, and the plurality of design parameters include at least: the piston cross-sectional shape of the air spring; determining descriptive information of the piston cross-sectional shape based on the deformation properties of the piston cross-sectional shape; calculating the stiffness of the air spring based on the descriptive information to obtain the stiffness properties of the air spring; and generating the air spring according to the stiffness properties.

[0007] Optionally, based on the deformation properties of the piston cross-section, the descriptive information of the piston cross-section includes: in response to the deformation properties characterizing the piston cross-section as a first deformation amplitude cross-section, the descriptive information of the piston cross-section is determined by a polynomial calculation method, wherein the descriptive information is expressed as a mathematical relational description of the piston cross-section.

[0008] Optionally, the polynomial calculation method includes: first-order coefficients, second-order coefficients, and a constant term. The description information of the piston cross-sectional shape determined by the polynomial calculation method includes: adjusting some or all of the parameters in the first-order coefficients, second-order coefficients, and constant term to obtain the description information of the piston cross-sectional shape.

[0009] Optionally, determining the descriptive information of the piston cross-section shape based on the deformation properties of the piston cross-section shape includes: in response to the deformation properties characterizing the piston cross-section shape as a second deformation amplitude section, determining multiple coordinate points based on the design table corresponding to the piston cross-section shape, wherein the design table is used to record the descriptive data associated with the piston cross-section shape; and using multiple coordinate points to fit and obtain the descriptive information of the piston cross-section shape, wherein the descriptive information is represented by a curve description connected by multiple coordinate points.

[0010] Optionally, obtaining descriptive information about the piston cross-sectional shape by fitting multiple coordinate points includes: using a two-dimensional line graph drawing command to fit multiple coordinate points to obtain descriptive information about the piston cross-sectional shape.

[0011] Optionally, the stiffness of the air spring is calculated based on the descriptive information to obtain the stiffness properties of the air spring, including estimating the volume of the bladder curling area based on the descriptive information.

[0012] Optionally, the volume estimation of the air spring at the bladder curling point based on the descriptive information to obtain the stiffness properties of the air spring includes: estimating the volume of the air spring at the bladder curling point based on the descriptive information to obtain the expression for the radius change at the bladder curling point; and calculating the stiffness properties of the air spring using the expression for the radius change at the bladder curling point, wherein the stiffness properties include: the dynamic stiffness of the air spring and the static stiffness of the air spring.

[0013] According to one embodiment of the present invention, an apparatus for generating an air spring is also provided, comprising: an acquisition module for acquiring multiple design parameters, wherein the multiple design parameters are used to design an air spring to be used in a preset vehicle, and the multiple design parameters include at least: the piston cross-sectional shape of the air spring; a determination module for determining descriptive information of the piston cross-sectional shape based on the deformation properties of the piston cross-sectional shape; a calculation module for calculating the stiffness of the air spring based on the descriptive information to obtain the stiffness properties of the air spring; and a generation module for generating the air spring according to the stiffness properties.

[0014] Optionally, the determining module is also used to determine the descriptive information of the piston cross-section shape in response to the deformation property characterizing the piston cross-section shape as a first deformation amplitude cross-section, using a polynomial calculation method, wherein the descriptive information is expressed as a mathematical relational description of the piston cross-section shape.

[0015] Optionally, the determining module is also used to adjust some or all of the parameters in the first-order coefficient, the second-order coefficient, and the constant term to obtain descriptive information about the piston cross-sectional shape.

[0016] Optionally, the determining module is further configured to, in response to the deformation property characterizing the piston cross-section shape as a second deformation amplitude cross-section, determine multiple coordinate points based on the design table corresponding to the piston cross-section shape, wherein the design table is used to record descriptive data associated with the piston cross-section shape; and use multiple coordinate points to fit and obtain descriptive information of the piston cross-section shape, wherein the descriptive information is represented by a curve description connected by multiple coordinate points.

[0017] Optionally, the determination module is also used to fit multiple coordinate points using a two-dimensional line graph drawing command to obtain descriptive information about the piston cross-sectional shape.

[0018] Optionally, the calculation module is also used to estimate the volume of the air spring at the blister curl based on the description information, thereby obtaining the stiffness properties of the air spring.

[0019] Optionally, the calculation module is also used to estimate the volume of the air spring at the curled-up area based on the description information, and obtain the expression for the radius change at the curled-up area; the stiffness properties of the air spring are calculated using the expression for the radius change at the curled-up area, wherein the stiffness properties include: the dynamic stiffness of the air spring and the static stiffness of the air spring.

[0020] According to one embodiment of this application, a vehicle is also provided, the vehicle including: an air spring, the vehicle being used to perform the method for generating the air spring as described in any of the preceding claims to obtain the air spring.

[0021] According to one embodiment of the present invention, a computer-readable storage medium is also provided, wherein the storage medium stores a computer program, wherein the computer program is configured to execute the method for generating an air spring as described above when running on a computer or processor.

[0022] According to one embodiment of the present invention, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the method of generating an air spring as described above.

[0023] In this embodiment of the invention, multiple design parameters are obtained, which are used to design an air spring to be used in a pre-defined vehicle. These design parameters include at least the piston cross-sectional shape of the air spring. Based on the deformation properties of the piston cross-sectional shape, descriptive information about the piston cross-sectional shape is determined. Then, based on this descriptive information, the air spring stiffness is calculated to obtain its stiffness properties. Finally, the air spring is generated according to these stiffness properties. This simplifies the method through a concise and easy-to-operate design and the introduction of a functional expression for complex piston cross-sectional shapes. It achieves the technical effect of considering the continuous change in gas volume at the lug of the rubber bladder during the compression and stretching process of an air spring with a variable piston cross-section. The method is simple, easy to implement, time-efficient, highly comprehensive, and highly accurate. This solves the technical problems of related technologies that use polynomial input to obtain different stiffness curves to generate air springs, resulting in complex methods that are difficult to implement, time-consuming, inefficient, lack comprehensiveness, and have low accuracy. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 It is a schematic diagram of an air spring with a constant straight piston cross-section;

[0026] Figure 2(a) is a schematic diagram of an air spring based on a piston with a non-constant straight line.

[0027] Figure 2(b) is an enlarged schematic diagram of an air spring with a piston cross-section that is a non-constant straight line;

[0028] Figure 3 It is based on a schematic diagram of the actual volume of the curled part of an air spring;

[0029] Figure 4 This is a schematic diagram of the volume at the posterior bladder curling point, based on an approximate estimation of an air spring.

[0030] Figure 5 This is a flowchart of a method for generating an air spring according to one embodiment of the present invention;

[0031] Figure 6 This is a structural block diagram of an apparatus for generating an air spring according to one embodiment of the present invention. Detailed Implementation

[0032] For ease of understanding, some concepts related to the embodiments of the present invention are explained by way of example for reference.

[0033] As shown below:

[0034] Air springs: Devices that use compressed air to support weight and absorb vibrations, widely used in vehicles. Their main components include: a steel housing: typically cylindrical or elliptical, housing the spring and gas; rubber bushings: located inside the steel housing to protect the spring from damage and provide additional cushioning; the spring body: the actual compression element. It is made of high-strength steel and specially designed to withstand weight and vibration; an air interface: connected to the vehicle's air system, allowing adjustment of spring stiffness and height by regulating air pressure; and a pressure sensor: detecting air pressure and sending signals to the vehicle's control system, enabling automatic adjustment of the suspension height.

[0035] The air spring in this embodiment of the invention mainly refers to the spring body in the above-mentioned components, which typically consists of an inner liner, an outer shell, and a connector. Specifically, the inner liner is an inflatable rubber bag that can withstand high-pressure air. This rubber bag is generally made of natural or synthetic rubber, and plasticizers, antioxidants, and other substances are added during processing to improve its performance. The outer shell is a sleeve made of metal (such as steel) or polymer (such as nylon) to protect the inner rubber bag and provide support for the entire spring. The connector connects the inner rubber bag to an external system. They come in different forms, including threaded joints, quick couplings, and flange connections. In use, the spring stiffness and stroke are adjusted by injecting an appropriate amount of compressed air into the inner rubber bag. When shock absorption is required, the compressed air can absorb vibrations and mitigate impact forces.

[0036] Air springs are primarily used in: Suspension systems: Air springs can be used as a key component of suspension systems, replacing traditional steel springs or hydraulic shock absorbers to provide better comfort and stability; Steering systems: Height-adjustable front and rear wheel steering mechanisms are used in some large trucks, buses, or coaches. In these cases, air springs can be used to control the tilt between the front and rear wheels, further improving the ride experience; Chassis lifting systems: In special situations (such as rescue operations), where the chassis needs to be raised to traverse obstacles or terrain, a chassis lifting system consisting of multiple air springs can be used to achieve this goal; Vehicle balance control: Depending on road surface changes, different numbers or sizes of air springs can be installed on the left and right sides to achieve left-right balance by increasing or decreasing the load at one location.

[0037] Currently, traditional computer-aided engineering (CAE) analysis and calculation processes are complex and time-consuming, making them unsuitable for stiffness matching design in the early stages of development. While existing simple calculation tools can conveniently perform stiffness calculations, their functions are limited and cannot be applied to the stiffness calculation of air springs with variable piston cross sections. During the compression and tension process of an air spring with a variable piston cross section, the gas volume at the lug of the rolled-up rubber bladder changes continuously, and existing calculation tools often ignore this change, resulting in methodological errors in the stiffness calculation results.

[0038] Therefore, the outer circumference of the piston cross-section in commonly manufactured air springs is usually a constant straight line or a linear function with a constant slope. The development and design of such air springs are relatively simple, and their stiffness calculation is more suitable for polynomial input. Changing the coefficients of the first term, the second term, and the constant term yields different stiffness curves. The principle of coordinate value input is to use simulation software, such as the `plot` command in MATLAB, to fit a curve based on the x and y coordinates of the input points. Regarding the selection of the fitting order, it has been found that order 5 yields the best results. Theoretically, the more design points input, the more accurate the fitted curve. Too few input coordinate points will lead to curve distortion, while too many input design coordinate points will result in cumbersome operation. It is recommended that the more complex the piston cross-section shape, the more coordinate points should be input.

[0039] Furthermore, the approximate estimation of the gas volume at the bladder curling point indicates that for an air spring with a constant straight piston cross-section, its volume remains constant regardless of the stretching or compression position. Therefore, when calculating the effective volume change rate of the gas inside the air spring, the bladder curling point need not be considered. Figure 1 It is based on a schematic diagram of an air spring with a constant straight piston cross-section, such as... Figure 1 As shown, when the piston cross-section of the air spring is a constant straight line, the volume of the rolled-up part of the bladder remains unchanged regardless of how it is stretched or compressed.

[0040] However, when the piston cross-section is not a constant straight line, for example, a straight line with a slope, the distance between the piston and the bladder guide sleeve changes as the air spring is compressed and stretched. The radius of the bladder's bending also changes accordingly, and the volume of gas enclosed within that part of the bladder changes accordingly. Figure 2(a) is a schematic diagram of an air spring with a non-constant straight piston cross-section, and Figure 2(b) is an enlarged schematic diagram of an air spring with a non-constant straight piston cross-section. As shown in Figures 2(a) and 2(b), a comparison reveals that when the piston cross-section of the air spring is not a constant straight line, the volume at the bladder's curled-up area changes during stretching and compression.

[0041] When the rate of change of the piston cross-section shape is small, or when the volume change of this part is negligible, the effect on the calculated stiffness of the air spring is not significant and can be ignored. However, when the rate of change of the piston cross-section shape is large, the volume change at this point also increases. If the volume change rate at the bladder curling point is still ignored, the calculated stiffness will deviate significantly from the actual measured stiffness. Figure 3 It is based on a schematic diagram of the actual volume of the curled part of an air spring. Figure 4 This is a schematic diagram showing an approximate estimate of the volume at the posterior bladder curling point based on an air spring, as shown below. Figure 3 and Figure 4 As shown, when the rate of change of the piston cross-section shape is large, the volume change also increases. If the rate of change of volume at the rolled-up part of the bladder skin is ignored at this time, the calculated stiffness will deviate significantly from the actual measured stiffness.

[0042] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] According to one embodiment of the present invention, an embodiment of a method for generating an air spring is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than that shown here.

[0045] This method embodiment can be executed in an electronic device, similar control device, or system that includes a memory and a processor. Taking an electronic device as an example, the electronic device may include one or more processors and a memory for storing data. Optionally, the electronic device may also include a communication device for communication functions and a display device. Those skilled in the art will understand that the above structural description is merely illustrative and does not limit the structure of the electronic device. For example, the electronic device may include more or fewer components than described above, or have a different configuration than described above.

[0046] A processor may include one or more processing units. For example, a processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processing unit (NPU), a tensor processing unit (TPU), or an artificial intelligence (AI) processor. Different processing units may be independent components or integrated into one or more processors. In some instances, electronic devices may also include one or more processors.

[0047] The memory can be used to store computer programs, such as the computer program corresponding to the method for generating an air spring in the embodiments of the present invention. The processor implements the above-described method for generating an air spring by running the computer program stored in the memory. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to electronic devices via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0048] Communication devices are used to receive or send data via a network. Specific examples of such networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the communication device includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the communication device may be a radio frequency (RF) module used for wireless communication with the Internet.

[0049] The display device can be, for example, a touchscreen liquid crystal display (LCD) and a touch display (also referred to as a "touchscreen" or "touch screen"). This LCD allows the user to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows the user to interact with the GUI by touching and / or gesturing on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, a call interface, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0050] This embodiment provides a method for generating an air spring that operates in an electronic device. Figure 5 This is a flowchart of a method for generating an air spring according to one embodiment of the present invention, such as... Figure 5 As shown, the process includes the following steps:

[0051] Step S50: Obtain multiple design parameters;

[0052] Among them, multiple design parameters are used to design the air springs to be used in the preset vehicle, and the multiple design parameters include at least the piston cross-sectional shape of the air spring.

[0053] It is understood that the air spring to be used in a vehicle, as a device that uses compressed air to support weight and absorb vibration, is mainly composed of a steel shell, rubber pads, spring body, air interface and pressure sensor. Therefore, when generating an air spring, it is necessary to obtain detailed structural parameters of each component of the air spring, such as: load, stroke, suspension lever ratio, wheel center height in different modes, air chamber volume, sleeve diameter, piston cross-sectional shape, bladder thickness, gas index, etc. This embodiment of the invention does not limit these parameters.

[0054] It is understandable that the piston cross-sectional shape of the air spring has a significant impact on the change of the air spring stiffness curve. Its change directly affects the effective radius of the bearing surface in the air spring, and thus affects the effective bearing area and the rate of change of gas volume in the air chamber.

[0055] This step can be understood as obtaining detailed structural parameters of each component of the air spring used in the design of the air spring to be used in the preset vehicle. Optionally, the design parameters of the air spring can be determined according to the actual needs of the current vehicle, which is not limited in this embodiment of the invention.

[0056] For example, the required design parameters of the air spring can be determined according to the type and functional requirements of the current vehicle. Detailed structural parameters such as the load, stroke, suspension lever ratio, wheel center height under different modes, air chamber volume, sleeve diameter, piston cross-sectional shape, bladder thickness, and gas index of the air spring can be determined to obtain multiple design parameters. This embodiment of the invention is not limited to these parameters.

[0057] Step S51: Determine the descriptive information of the piston cross-section shape based on the deformation properties of the piston cross-section shape;

[0058] The deformation properties of the piston cross-section shape are used to represent the specific changes in the piston cross-section shape. For example, it can be a constant straight line or a linear function with a constant slope, etc., which is not limited in the embodiments of the present invention.

[0059] The descriptive information about the piston cross-sectional shape can be understood as the specific information used to describe the shape of the piston cross-section. It can be understood that changes in the piston cross-sectional shape of an air spring directly affect the effective radius of the bearing surface in the air spring, thus affecting the effective bearing area and the rate of change of gas volume within the air chamber.

[0060] This step can be understood as determining the specific information used to describe the piston cross-sectional shape based on the specific changing properties of the piston cross-section in the air spring, thereby providing a calculation basis for the subsequent calculation of the air spring stiffness and ensuring the accuracy of the air spring stiffness properties.

[0061] Step S52: Calculate the stiffness of the air spring based on the description information to obtain the stiffness properties of the air spring.

[0062] The stiffness property of an air spring describes the relationship between the pressure applied to it and the resulting deformation. It's understood that the stiffness of an air spring depends on factors such as its internal pressure, volume, and material. When the internal pressure increases, the spring will deform to a greater extent, and its stiffness will increase accordingly. Similarly, air springs with higher material hardness will also have higher stiffness.

[0063] This step can be understood as calculating the stiffness of the air spring based on the specific information used to describe the cross-sectional shape of the piston, and obtaining the stiffness property that represents the relationship between the pressure on the air spring and the deformation it produces.

[0064] Optionally, the air spring stiffness can be calculated using the gas state equation based on the specific information describing the piston cross-sectional shape, taking into account the volume changes at each location. This yields the relationship between the pressure on the air spring and the deformation it produces, i.e., the stiffness property of the air spring. This embodiment of the invention does not limit this.

[0065] Step S53: Generate an air spring according to its stiffness properties.

[0066] This step can be understood as generating an air spring according to the stiffness properties that represent the relationship between the pressure applied to the air spring and the resulting deformation. This allows for accurate consideration of the deformation that occurs during the compression and stretching of an air spring with a variable piston cross section. Generating an air spring based on accurate stiffness properties is highly efficient, comprehensive, and accurate.

[0067] Through the above steps, multiple design parameters are obtained. These parameters are used to design the air spring to be used in the vehicle. At least the piston cross-sectional shape of the air spring is included. Based on the deformation properties of the piston cross-sectional shape, descriptive information about the piston cross-sectional shape is determined. Then, based on this descriptive information, the air spring stiffness is calculated to obtain its stiffness properties. Finally, the air spring is generated according to these stiffness properties. This method simplifies the process by introducing a simple and easy-to-operate design and a functional expression of the complex piston cross-sectional shape. It achieves the technical effect of considering the continuous change in gas volume at the lug of the rubber bladder during the compression and stretching process of an air spring with a variable piston cross-section. The method is simple, easy to implement, time-efficient, highly comprehensive, and accurate. This solves the technical problems of related technologies that use polynomial input to obtain different stiffness curves to generate air springs, resulting in complex methods that are difficult to implement, time-consuming, inefficient, lack comprehensiveness, and have low accuracy.

[0068] Optionally, in step S51, determining the descriptive information of the piston cross-sectional shape based on its deformation properties may include the following steps:

[0069] Step S510: In response to the deformation property characterizing the piston cross-sectional shape as the first deformation amplitude cross-section, the descriptive information of the piston cross-sectional shape is determined by polynomial calculation.

[0070] The descriptive information is presented as a mathematical formula describing the shape of the piston cross-section.

[0071] The first deformation amplitude section can be understood as a non-complex change section shape. When the deformation property characterizes the piston section shape as the first deformation amplitude section, that is, a non-complex change section shape, it means that the change in the piston section shape in the air spring can be described by a simple formula.

[0072] This step can be understood as follows: when the deformation property characterizes the piston cross-sectional shape as the first deformation amplitude cross-section, it means that the deformation property characterizes the piston cross-sectional shape as a non-complex changing cross-sectional shape. That is, the change in the piston cross-sectional shape in the air spring can be described by a simple formula. At this time, the description information of the piston cross-sectional shape is determined by polynomial calculation. This embodiment of the invention does not limit this.

[0073] Specifically, the description information of the piston cross-sectional shape can be determined by quadratic function and linear function polynomial calculation methods, and the embodiments of the present invention are not limited thereto.

[0074] Optionally, in step S510, the polynomial calculation method includes: coefficients of the first term, coefficients of the second term, and a constant term. The polynomial calculation method for determining the descriptive information of the piston cross-sectional shape may include the following execution steps:

[0075] Step S5100: Adjust some or all of the parameters in the first-order coefficient, the second-order coefficient, and the constant term to obtain descriptive information about the piston cross-sectional shape.

[0076] This step can be understood as follows: when the deformation property characterizes the piston cross-sectional shape as the first deformation amplitude cross-section, it means that the deformation property characterizes the piston cross-sectional shape as a non-complex changing cross-sectional shape, that is, the piston cross-sectional shape change rate in the air spring is small and can be described by a simple formula. At this time, the polynomial calculation method is used, including: first term coefficient, second term coefficient and constant term, and some or all of the parameters in the first term coefficient, second term coefficient and constant term are adjusted to obtain the specific information used to describe the piston cross-sectional shape, that is, to obtain the descriptive information.

[0077] Optionally, in step S51, determining the descriptive information of the piston cross-sectional shape based on its deformation properties may include the following steps:

[0078] Step S511: In response to the deformation property characterizing the piston cross-section shape as the second deformation amplitude cross-section, multiple coordinate points are determined based on the design table corresponding to the piston cross-section shape;

[0079] The design table is used to record descriptive data related to the piston cross-sectional shape.

[0080] The second deformation amplitude section can be understood as a complex changing cross-sectional shape. When the deformation attribute characterizes the piston cross-sectional shape as the second deformation amplitude section, i.e. a complex changing cross-sectional shape, the piston cross-sectional shape in the air spring has a large rate of change. Based on the descriptive data corresponding to the piston cross-sectional shape used to record the correlation of the piston cross-sectional shape, multiple coordinate points are determined.

[0081] Optionally, the design table for recording the descriptive data associated with the piston cross-section shape can be determined by retrieving the historical descriptive data associated with the piston cross-section shape, and this embodiment of the invention is not limited thereto.

[0082] Step S512: Use multiple coordinate points to fit and obtain descriptive information about the piston cross-sectional shape.

[0083] The descriptive information is represented by a curve connecting multiple coordinate points.

[0084] This step can be understood as follows: when the deformation attribute characterizes the piston cross-section shape as the second deformation amplitude cross-section, i.e., a complex changing cross-section shape, multiple coordinate points are determined based on the descriptive data corresponding to the piston cross-section shape used to record the correlation of the piston cross-section shape. The descriptive information of the piston cross-section shape is obtained by fitting multiple coordinate points, where the descriptive information is represented by the curve description connected by multiple coordinate points.

[0085] Optionally, in step S512, obtaining the descriptive information of the piston cross-sectional shape by fitting multiple coordinate points may include the following execution steps:

[0086] Step S5120: Use the command to draw a two-dimensional line graph to fit multiple coordinate points and obtain descriptive information about the piston cross-sectional shape.

[0087] Two-dimensional line graph commands can be understood as commands used to generate curve description information connecting multiple coordinate points, such as command statements, etc., which are not limited in this embodiment of the invention.

[0088] This step can be understood as using the command to draw a two-dimensional line graph to fit the multiple coordinate points obtained by the above polynomial calculation method or coordinate point fitting, so as to obtain the descriptive information of the piston cross-section shape.

[0089] Optionally, the above steps can be completed by inputting the horizontal and vertical coordinates of the points in simulation software, such as the MATLAB platform, to fit the curve; this embodiment of the invention is not limited thereto. For example, the piston cross-section curve, i.e., the information described by the curve connecting multiple coordinate points, can be obtained from the coordinate axes using the plot command in the MATLAB platform; this embodiment of the invention is not limited thereto.

[0090] Optionally, in step S52, calculating the air spring stiffness based on the description information to obtain the air spring stiffness properties may include the following steps:

[0091] Step S520: Estimate the volume of the air spring at the curled-up area based on the description information to obtain the stiffness properties of the air spring.

[0092] This step can be understood as estimating the volume of the air spring at the curled-up area based on the information described by the curves connected by multiple coordinate points, thereby obtaining the stiffness properties of the air spring. Optionally, the expression for the radius change at the curled-up area can be determined based on the geometric relationship of each component in the air spring, i.e., the air spring stiffness is calculated. This embodiment of the invention does not impose any limitations.

[0093] Optionally, in step S520, calculating the air spring stiffness based on the description information to obtain the air spring stiffness properties may include the following steps:

[0094] Step S5200: Based on the description information, estimate the volume of the skin curling area to obtain the expression for the radius change at the skin curling area;

[0095] This step can be understood as estimating the volume of the skin curling area based on the information described by the curves connected by multiple coordinate points, and obtaining an expression to represent the radius change at the skin curling area.

[0096] Specifically, the radius of the bladder skin can always be approximated as half the distance between the bladder skin guide sleeve and the piston, and the volume of the gas enclosed inside can always be approximated as the volume of a semi-circular ring. Then, based on geometric relationships, an expression for the change in radius at the bladder skin curling point is derived, that is, the volume at the bladder skin curling point is estimated to obtain an expression for the change in radius at the bladder skin curling point. This embodiment of the invention is not limited.

[0097] Step S5201: The stiffness properties of the air spring are calculated using the expression for the radius change at the curled-up part of the bladder.

[0098] Among them, stiffness properties include: dynamic stiffness and static stiffness of air spring.

[0099] The dynamic stiffness of an air spring refers to the resistance generated when the spring undergoes a certain displacement, and it increases with the increase of displacement velocity. It is used to describe the air spring's ability to respond to external excitation or vibration.

[0100] The static stiffness of an air spring refers to the amount of force required to deform (usually compression) the spring when there is no displacement. It describes the degree to which an air spring resists deformation and its load-bearing capacity under external forces.

[0101] This step can be understood as using an expression representing the change in radius at the point where the air spring is curled to calculate the stiffness properties, including the dynamic stiffness and static stiffness of the air spring.

[0102] Specifically, the dynamic stiffness and static stiffness of the air spring can be calculated using mathematical methods such as the gas state equation, differentiation, and integration. This valve embodiment does not impose any limitations on these methods.

[0103] In an optional embodiment, the above steps can be implemented through a software platform design interface. For example, the above steps can be implemented through a MATLAB platform design interface, and this embodiment of the invention is not limited thereto. Specifically, three tabs can be set in the upper left corner of the interface, where the performance calculation interface is divided into two parts: the left side is for input and the right side is for output. The input parameter interface is used to input basic parameters, polynomials, and coordinate values, and the output parameter interface is used to output the air spring stiffness stroke curve.

[0104] When the program interface is running, users input basic parameters, including detailed parameters such as load, stroke, volume, and gas index, into the left-hand input parameter interface. Then, based on the piston cross-sectional shape, they input a polynomial and coordinate values. Specifically, when inputting the polynomial, they input the coefficients of the first and second terms of the function that expresses the change in the piston cross-sectional shape, and a constant. Clicking "Calculate" then generates the piston cross-sectional curve on the coordinate axes. When inputting coordinate values, clicking "Calculate" triggers a callback function that reads the piston cross-sectional shape design table and fits the curve onto the coordinate axes. The design table can be edited and saved within the app, and design points can be adjusted in real time.

[0105] The air spring stiffness-stroke curve is output via the output parameter interface on the right. Specifically, the output parameter interface contains two coordinate axes. The upper coordinate axis outputs the air spring force-stroke curve, and its right side displays parameters such as maximum off-road pressure, minimum dynamic pressure, and burst pressure. The lower coordinate axis outputs the air spring stiffness-stroke curve, and its right side allows for input of positional dynamic and static stiffness, and can also insert measured stiffness curves of the air spring, enabling a clear comparison between measured and theoretical designs.

[0106] Through the above steps, the technical problems of long calculation time and low accuracy of air spring stiffness can be solved by introducing a simple and easy-to-use interface design, a function-based expression of complex piston cross-section shape, and a volume estimation method at the rubber bladder lug. It can be applied to the stiffness calculation of complex variable cross-section piston air springs. By adjusting the piston cross-section shape characterization parameters, or even by back-deriving the piston cross-section shape that matches the ideal dynamic stiffness curve, an air spring with more ideal stiffness characteristics can be obtained.

[0107] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0108] This embodiment also provides an apparatus for generating an air spring, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0109] Figure 6 This is a structural block diagram of an air spring generating apparatus according to one embodiment of the present invention. As shown in the figure, taking the air spring generating apparatus 00 as an example, the apparatus includes: an acquisition module 601, used to acquire multiple design parameters, wherein the multiple design parameters are used to design a preset air spring to be used in a vehicle, and the multiple design parameters include at least: the piston cross-sectional shape of the air spring; a determination module 602, used to determine descriptive information of the piston cross-sectional shape based on the deformation properties of the piston cross-sectional shape; a calculation module 603, used to calculate the air spring stiffness based on the descriptive information to obtain the stiffness properties of the air spring; and a generation module 604, used to generate the air spring according to the stiffness properties.

[0110] Optionally, the determining module 601 is further configured to determine the descriptive information of the piston cross-section shape in response to the deformation property characterizing the piston cross-section shape as a first deformation amplitude cross-section, using a polynomial calculation method, wherein the descriptive information is expressed as a mathematical relational description of the piston cross-section shape.

[0111] Optionally, the determining module 602 is also used to adjust some or all of the parameters in the first-order coefficient, the second-order coefficient, and the constant term to obtain descriptive information about the piston cross-sectional shape.

[0112] Optionally, the determining module 602 is further configured to, in response to the deformation property characterizing the piston cross-section shape as a second deformation amplitude cross-section, determine multiple coordinate points based on the design table corresponding to the piston cross-section shape, wherein the design table is used to record descriptive data associated with the piston cross-section shape; and use multiple coordinate points to fit and obtain descriptive information of the piston cross-section shape, wherein the descriptive information is represented by a curve description connected by multiple coordinate points.

[0113] Optionally, the determining module 602 is also used to fit multiple coordinate points using a two-dimensional line graph drawing command to obtain descriptive information about the piston cross-sectional shape.

[0114] Optionally, the calculation module 603 is also used to estimate the volume of the bladder curl based on the description information to obtain the stiffness properties of the air spring.

[0115] Optionally, the calculation module 603 is further configured to estimate the volume of the air spring at the curled-up area based on the description information, thereby obtaining an expression for the radius change at the curled-up area; and to calculate the stiffness properties of the air spring using the expression for the radius change at the curled-up area, wherein the stiffness properties include the dynamic stiffness and the static stiffness of the air spring. It should be noted that the above modules can be implemented by software or hardware. For the latter, implementation can be achieved in the following ways, but is not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0116] Embodiments of this application also provide a vehicle for performing the steps in any of the above method embodiments.

[0117] Optionally, in this embodiment, the vehicle may be configured to store a computer program for performing the following steps:

[0118] Step S1: Obtain multiple design parameters;

[0119] Step S2: Determine the descriptive information of the piston cross-section shape based on the deformation properties of the piston cross-section shape;

[0120] Step S3: Calculate the stiffness of the air spring based on the description information to obtain the stiffness properties of the air spring;

[0121] Step S4: Generate an air spring according to its stiffness properties.

[0122] Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, wherein the computer program is configured to perform the steps in any of the above method embodiments when run on a computer or processor.

[0123] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0124] Step S1: Obtain multiple design parameters;

[0125] Step S2: Determine the descriptive information of the piston cross-section shape based on the deformation properties of the piston cross-section shape;

[0126] Step S3: Calculate the stiffness of the air spring based on the description information to obtain the stiffness properties of the air spring;

[0127] Step S4: Generate an air spring according to its stiffness properties.

[0128] Optionally, in this embodiment, the computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0129] Embodiments of the present invention also provide an electronic device including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0130] Optionally, in this embodiment, the processor in the above-described electronic device may be configured to run a computer program to perform the following steps:

[0131] Step S1: Obtain multiple design parameters;

[0132] Step S2: Determine the descriptive information of the piston cross-section shape based on the deformation properties of the piston cross-section shape;

[0133] Step S3: Calculate the stiffness of the air spring based on the description information to obtain the stiffness properties of the air spring;

[0134] Step S4: Generate an air spring according to its stiffness properties.

[0135] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0136] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0137] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0139] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0140] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0141] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0142] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for generating an air spring, characterized in that, include: Multiple design parameters are obtained, wherein the multiple design parameters are used to design an air spring to be used in a preset vehicle, and the multiple design parameters include at least the piston cross-sectional shape of the air spring; Based on the deformation properties of the piston cross-section shape, determining the descriptive information of the piston cross-section shape includes: in response to the deformation properties indicating that the piston cross-section shape is a first deformation amplitude section, determining the descriptive information of the piston cross-section shape using a polynomial calculation method, wherein the descriptive information is expressed as a mathematical relational description of the piston cross-section shape; or, in response to the deformation properties indicating that the piston cross-section shape is a second deformation amplitude section, determining multiple coordinate points based on a design table corresponding to the piston cross-section shape, wherein the design table is used to record descriptive data associated with the piston cross-section shape; and fitting the multiple coordinate points to obtain the descriptive information of the piston cross-section shape, wherein the descriptive information is expressed as a curve description connected by the multiple coordinate points. The stiffness of the air spring is calculated based on the described information to obtain the stiffness properties of the air spring. The air spring is generated according to the stated stiffness property; The stiffness of the air spring is calculated based on the described information, and the stiffness attribute of the air spring is obtained by estimating the volume of the bladder curling area based on the described information.

2. The method according to claim 1, characterized in that, The polynomial calculation method includes: coefficients of the first term, coefficients of the second term, and a constant term. The polynomial calculation method determines the descriptive information of the piston cross-sectional shape, including: By adjusting some or all of the parameters in the first-order term coefficient, the second-order term coefficient, and the constant term, the descriptive information of the piston cross-sectional shape is obtained.

3. The method according to claim 1, characterized in that, The descriptive information for obtaining the piston cross-sectional shape by fitting the multiple coordinate points includes: The multiple coordinate points are fitted using a two-dimensional line graph drawing command to obtain the descriptive information of the piston cross-sectional shape.

4. The method according to claim 1, characterized in that, Based on the described information, the volume of the bladder curling area is estimated, and the stiffness properties of the air spring are obtained, including: Based on the described information, the volume of the area where the skin curls up is estimated, and an expression for the radius change at the area where the skin curls up is obtained. The stiffness property of the air spring is calculated using the expression for the radius change at the curled-up part of the bladder, wherein the stiffness property includes the dynamic stiffness and the static stiffness of the air spring.

5. An apparatus for generating an air spring, characterized in that, include: The acquisition module is used to acquire multiple design parameters, wherein the multiple design parameters are used to design an air spring to be used in a preset vehicle, and the multiple design parameters include at least the piston cross-sectional shape of the air spring; The determining module is used to determine the descriptive information of the piston cross-section shape based on the deformation properties of the piston cross-section shape, including: in response to the deformation properties indicating that the piston cross-section shape is a first deformation amplitude section, determining the descriptive information of the piston cross-section shape using a polynomial calculation method, wherein the descriptive information is expressed as a mathematical relational description of the piston cross-section shape; or, in response to the deformation properties indicating that the piston cross-section shape is a second deformation amplitude section, determining multiple coordinate points based on a design table corresponding to the piston cross-section shape, wherein the design table is used to record descriptive data associated with the piston cross-section shape; and fitting the multiple coordinate points to obtain the descriptive information of the piston cross-section shape, wherein the descriptive information is expressed as a curve description connected by the multiple coordinate points. The calculation module is used to calculate the stiffness of the air spring based on the description information, and obtain the stiffness properties of the air spring. A generation module is used to generate the air spring according to the stiffness attribute; The stiffness of the air spring is calculated based on the described information, and the stiffness attribute of the air spring is obtained by estimating the volume of the bladder curling area based on the described information.

6. A vehicle, characterized in that, The vehicle includes an air spring, which is obtained by performing the method for generating an air spring as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein the computer program is configured to execute, when run on a computer or processor, the method for generating an air spring as described in any one of claims 1 to 4.

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