Modeling method, device, electronic device and storage medium for torsion beam suspension

Abstract

The present invention provides a modeling method, device, electronic device and storage medium for a torsion beam suspension. The method comprises: when obtaining the position information of multiple hard points input by a user, controlling 3D modeling software to model the torsion beam suspension and generate a first torsion beam suspension model; when obtaining an extraction instruction input by the user, controlling the 3D modeling software to extract the first longitudinal arm point, the first wheel center point and the shear center point to form a first rigid body, and the first longitudinal arm point, the first cross beam point and the shear center point form a first plane; extracting the second longitudinal arm point, the second wheel center point and the shear center point to form a second rigid body, and the second longitudinal arm point, the second cross beam point and the shear center point form a second plane; based on the first rigid body, the second rigid body and the cross beam model, controlling the 3D modeling software to form a second torsion beam suspension model.

Description

Technical Field

[0001] The present invention relates to the field of vehicle electronics, and in particular to a modeling method, a device, an electronic device and a storage medium for a torsion beam suspension. Background Art

[0002] Torsion beam suspension is a type of rear suspension for automobiles. It uses a torsion beam to balance the up and down bounce of the left and right wheels to reduce the shaking of the vehicle and keep the vehicle stable. It is a type of non-independent suspension; it is also called semi-independent suspension.

[0003] In the prior art, solid modeling is often performed in 3D modeling software, and finite element software is used to generate a modal neutral frequency (MNF) file from the 3D data of the torsion beam to achieve the testing of parallel bounce of the left and right wheels, single wheel bounce and roll motion.

[0004] However, in the prior art, on the one hand, the method of using multiple software to perform the test is complicated and inefficient. On the other hand, the torsion beam suspension is a non-independent suspension in the digital model state, and its left and right wheels will be involved in each other when moving, resulting in the process of treating it as an integral bridge type non-independent suspension, and the accuracy of the wheel movement relationship cannot be ensured. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a modeling method, device, electronic device and storage medium for a torsion beam suspension, which can ensure the accuracy of the wheel motion relationship during the test process.

[0006] According to a first aspect of the present application, a modeling method for a torsion beam suspension is provided, the method comprising: in the case of obtaining position information of multiple hard points input by a user, controlling a 3D modeling software to model the torsion beam suspension to generate a first torsion beam suspension model; wherein the multiple hard points include at least: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model includes at least the first wheel center point and the first longitudinal arm point, a second wheel center point and a second longitudinal arm point and a beam model which are mirror-symmetrical with the shear center point as a symmetry point; the beam model includes a first beam point, a second beam point and a third beam point; in the case of obtaining an extraction instruction input by the user, controlling the 3D modeling software to extract The first longitudinal arm point, the first wheel center point and the shear center point constitute a first rigid body, and the first longitudinal arm point, the first beam point and the shear center point constitute a first plane; the second longitudinal arm point, the second wheel center point and the shear center point are extracted to constitute a second rigid body, and the second longitudinal arm point, the second beam point and the shear center point constitute a second plane; wherein the first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point of the beam model is arranged at the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point; based on the first rigid body, the second rigid body and the beam model, the 3D modeling software is controlled to form a second torsion beam suspension model.

[0007] Optionally, the first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point of the beam model is arranged at the midpoint of the connecting line of the first longitudinal arm point and the second longitudinal arm point, including: the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the connecting line between the third beam point and the shear center is perpendicular to the connecting line between the first beam point and the second beam point.

[0008] Optionally, in the case of obtaining the position information of multiple hard points input by the user, the 3D modeling software is controlled to model the torsion beam suspension to generate a first torsion beam suspension model; wherein the multiple hard points at least include: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model at least includes the first wheel center point and the first longitudinal arm point, which are respectively mirror-symmetric with the shear center as a symmetry point, and the second longitudinal arm point and the crossbeam model, including: in the case of obtaining the position information of the first wheel center point, the first longitudinal arm point and the shear center point input by the user In this case, the 3D modeling software is controlled to determine the first wheel center point and the first longitudinal arm point, which are respectively the second wheel center point and the second longitudinal arm point that are mirror-symmetrical with the shear center as the symmetry point; the user's first connection instruction is obtained; based on the first connection instruction, in order to make the model more intuitive, the 3D modeling software is controlled to connect the shear center point with the first wheel center point, the first longitudinal arm point, the second wheel center point and the second longitudinal arm point, connect the second longitudinal arm point with the first longitudinal arm point and the second wheel center point, connect the first wheel center point with the first longitudinal arm point, and set the beam model according to the shear center point.

[0009] Optionally, the first rigid body also includes: a first endpoint, the second rigid body also includes a second endpoint, the first endpoint, the second endpoint and the shear center point are combined into one, and the method also includes: if the first torsion beam suspension model adopts wheel center drive suspension bounce (the DMU model can also adopt shock absorber stroke drive), it also includes a first lifting drive plane and a second lifting drive plane; wherein, the first torsion beam suspension model also includes a first lifting drive plane and a second lifting drive plane; wherein, the first lifting drive plane is a plane with the first wheel center point as the first center point and perpendicular to the vertical line of the first center point, and the second lifting drive plane is a plane with the second wheel center point as the second center point and perpendicular to the vertical line of the first center point. a plane perpendicular to the second center point; obtaining a second connection instruction from the user; based on the second connection instruction, controlling the 3D modeling software to connect the first longitudinal arm point and the second longitudinal arm point to the spherical surface pair of the vehicle body respectively, connect the first end point and the second end point to the spherical surface pair of the shear center point respectively, connect the first cross beam point to the first plane point surface in the first rigid body, connect the second cross beam point to the second plane point surface in the second rigid body, connect the third cross beam point to the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point using a point curve, connect the first wheel center point to the first lifting drive plane point surface, and connect the second wheel center point to the second lifting drive plane point surface.

[0010] Optionally, the first beam point and the second beam point form a beam straight line;

[0011] The first longitudinal arm point and the second longitudinal arm point form a longitudinal arm straight line;

[0012] The crossbeam line is parallel to the trailing arm line and has the same length;

[0013] The shear center point is located at the center of the beam line.

[0014] Optionally, when obtaining the position information of multiple hard points input by the user, control the 3D modeling software to model the torsion beam suspension to generate a first torsion beam suspension model, including: when obtaining the position information of multiple hard points input by the user, control the 3D modeling software (such as CATIA) to model the DMU model of the torsion beam suspension to generate a first torsion beam suspension model.

[0015] According to a second aspect of the present application, a modeling device for a torsion beam suspension is provided, the device comprising:

[0016] The first control module is used to control the 3D modeling software to model the torsion beam suspension and generate a first torsion beam suspension model when the position information of multiple hard points input by the user is obtained; wherein the multiple hard points at least include: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model at least includes the first wheel center point and the first longitudinal arm point, which are respectively mirror-symmetrical with the shear center point, the second wheel center point and the second longitudinal arm point, and a crossbeam model; the crossbeam model includes a first crossbeam point, a second crossbeam point and a third crossbeam point; the extraction module is used to control the 3D modeling software to extract the first longitudinal arm point, the first wheel center point and the third crossbeam point when the extraction instruction input by the user is obtained. and shear center point to form a first rigid body, and the first plane is composed of the first longitudinal arm point, the first beam point and the shear center point; the second longitudinal arm point, the second wheel center point and the shear center point are extracted to form a second rigid body, and the second plane is composed of the second longitudinal arm point, the second beam point and the shear center point; wherein the first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point of the beam model is arranged at the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point; a construction module is used to control the 3D modeling software to construct a second torsion beam suspension model based on the first rigid body, the second rigid body and the beam model.

[0017] Optionally, the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the connection line between the third beam point and the shear center is perpendicular to the connection line between the first beam point and the second beam point.

[0018] Optionally, the first control module is also used to control the 3D modeling software to determine the second wheel center point and the second longitudinal arm point that are mirror-symmetrical with the shear center point, respectively, after obtaining the position information of the first wheel center point, the first longitudinal arm point and the shear center point input by the user; obtain the user's first connection instruction; based on the first connection instruction, to make the model more intuitive, control the 3D modeling software to connect the shear center point with the first wheel center point, the first longitudinal arm point, the second wheel center point and the second longitudinal arm point, connect the second longitudinal arm point with the first longitudinal arm point and the second wheel center point, connect the first wheel center point with the first longitudinal arm point, and set the beam model according to the shear center point.

[0019] Optionally, the first rigid body further includes: a first endpoint, the second rigid body further includes a second endpoint, the first endpoint, the second endpoint and the shear center point are combined into one, and the device further includes:

[0020] The first torsion beam suspension model further includes a first lifting driving plane and a second lifting driving plane; wherein the first lifting driving plane is a plane having the first wheel center point as a first center point and being perpendicular to a vertical line of the first center point, and the second lifting driving plane is a plane having the second wheel center point as a second center point and being perpendicular to the second center point;

[0021] A connection module, used to obtain a second connection instruction from a user;

[0022] The second control module is used to control the 3D modeling software to connect the first longitudinal arm point and the second longitudinal arm point with the spherical surface pair of the vehicle body respectively based on the second connection instruction, connect the first end point and the second end point with the spherical surface pair of the shear center point respectively, connect the first cross beam point with the first plane point surface in the first rigid body, connect the second cross beam point with the second plane point surface in the second rigid body, connect the third cross beam point with the midpoint of the connecting line of the first longitudinal arm point and the second longitudinal arm point using a point curve, connect the first wheel center point with the first lifting drive plane point surface, and connect the second wheel center point with the second lifting drive plane point surface.

[0023] Optionally, the first beam point and the second beam point form a beam straight line;

[0024] The first longitudinal arm point and the second longitudinal arm point form a longitudinal arm straight line;

[0025] The crossbeam line is parallel to the trailing arm line and has the same length;

[0026] The shear center point is located at the center of the beam line.

[0027] Optionally, the first control module is further used to control 3D modeling software (such as CATIA) to model the DMU model of the torsion beam suspension and generate a first torsion beam suspension model after obtaining the position information of multiple hard points input by the user.

[0028] According to a third aspect of the present application, an electronic device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, the steps of the modeling method of the torsion beam suspension of the first aspect are implemented.

[0029] According to a fourth aspect of the present application, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the modeling method of the torsion beam suspension of the first aspect are implemented.

[0030] In an embodiment of the present application, a server can be used as the executor of the present application, wherein, when the server obtains the position information of multiple hard points input by the user, the torsion beam suspension is modeled to generate a first model, wherein the multiple hard points include at least: a first wheel center point, a first longitudinal arm point and a shear center point; the torsion beam suspension model also includes at least a second wheel center point symmetrical to the shear center point and symmetrical to the first wheel center point, and a second longitudinal arm point symmetrical to the first longitudinal arm point; after the component model, the plane where the first longitudinal arm point, the first wheel center point and the shear center point are located is extracted to form a first rigid body, and the plane where the second longitudinal arm point, the second wheel center point and the shear center point are located is extracted to form a second rigid body, that is, the entire torsion beam is divided into a first rigid body and a second rigid body that are independent of each other, that is, the two rigid bodies can achieve independent movement of each other, thereby completing the test of roll movement and left and right wheel bouncing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 is a flow chart of a modeling method for a torsion beam suspension according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of a modeling method for a torsion beam suspension that can be selected in an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a modeling method for a torsion beam suspension that can be selected in an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of a modeling method for a torsion beam suspension that can be selected in an embodiment of the present invention; and

[0036] Figure 5 Schematic diagram of a modeling device for a torsion beam suspension according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above and other features and advantages of the present application more clear, the present invention is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0038] In the following description, many specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that specific details are not required to practice the present invention. In other cases, well-known steps or operations are not described in detail to avoid obscuring the present invention.

[0039] Based on the background technology, it can be seen that the relevant technology uses the 3D modeling software DMU model for modeling. On the one hand, the method of using multiple software for testing is complicated and inefficient. On the other hand, the torsion beam suspension is a non-independent suspension in the digital model state, and its left and right wheels will be involved with each other when moving, resulting in it being regarded as a whole bridge type non-independent suspension. During the test, the accuracy of the wheel movement relationship cannot be ensured.

[0040] The applicant has found through research that in order to solve the above technical problems, the torsion beam can be extracted and divided into two independent rigid bodies to form a new torsion beam model to achieve independent movement, and the torsion beam suspension can be modeled as a DMU model in 3D modeling software (such as CATIA), that is, modeling can be achieved in one software.

[0041] The method for modeling the torsion beam suspension provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0042] like Figure 1 As shown, the method for modeling a torsion beam suspension provided in an embodiment of the present application may include:

[0043] Step S11, after obtaining the position information of multiple hard points input by the user, control the 3D modeling software to model the torsion beam suspension and generate a first torsion beam suspension model; wherein the multiple hard points include at least: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model includes at least the first wheel center point and the first longitudinal arm point, the second wheel center point and the second longitudinal arm point, and a beam model that are mirror-symmetrical with the shear center point as a symmetry point, and the beam model includes a first beam point, a second beam point and a third beam point.

[0044] Specifically, in the present application, a central processing unit (CPU) can be used as the execution subject of the present application, and the CPU can establish a communication relationship with the 3D modeling software, wherein, in combination with Figure 2 As shown, in the case where the above-mentioned CPU obtains the position information of multiple hard points input by the user, it should be noted that the multiple hard points at least include the first wheel center point A, the first longitudinal arm point B and the shear center point O, and the CPU controls the above-mentioned 3D modeling software to model the torsion beam suspension to generate a first torsion beam suspension model. It should be noted that the above-mentioned first torsion beam suspension model at least includes the first wheel center point A and the first longitudinal arm point B, the second wheel center point A1 and the second longitudinal arm point B1 and the crossbeam model which are mirror-symmetrical with the shear center point O as the symmetry point, which is closer to the actual physical motion characteristics of the torsion beam, has a higher accuracy than the traditional integral bridge simulation method, and can realize rapid design confirmation and motion clearance verification of the torsion beam hard points (wheel center point, longitudinal arm point and shear center point), thereby improving design efficiency.

[0045] It should be noted that the torsion beam suspension may be a torsion beam suspension that has been designed by the user before the user issues instructions to the CPU. After the torsion beam suspension is designed, multiple hard points of the torsion beam suspension are also determined, that is, the positions of the multiple hard points are different according to different designed torsion beam suspensions.

[0046] In order to make the torsion beam model more intuitive and beautiful, combined with Figure 3 As shown, in an optional embodiment, in step S11, when the position information of multiple hard points input by the user is obtained, the 3D modeling software is controlled to model the torsion beam suspension to generate a first torsion beam suspension model, including:

[0047] When the position information of the first wheel center point A, the first longitudinal arm point B and the shear center point O input by the user is obtained, the 3D modeling software is controlled to determine the first wheel center point A and the first longitudinal arm point B to be the second wheel center point A1 and the second longitudinal arm point B1 which are mirror-symmetrical with the shear center point O as the symmetry point;

[0048] Obtaining the user's first connection instruction;

[0049] Based on the first connection instruction, the 3D modeling software is controlled to connect the shear center point O with the first wheel center point A, the first longitudinal arm point B, the second wheel center point A1 and the second longitudinal arm point B1 respectively, connect the second longitudinal arm point B1 with the first longitudinal arm point B and the second wheel center point A1 respectively, connect the first wheel center point A with the first longitudinal arm point B, and set the crossbeam model according to the shear center point O.

[0050] After the 3D modeling software determines the above-mentioned first wheel center point A, first longitudinal arm point B, second wheel center point A1 and second longitudinal arm point B1, the CPU obtains the first connection instruction issued by the user, and controls the 3D modeling software to connect the shear center point O with the first wheel center point A, the first longitudinal arm point B, the second wheel center point A1 and the second longitudinal arm point B1 respectively, connect the second longitudinal arm point B1 with the first longitudinal arm point B and the second wheel center point A1 respectively, connect the first wheel center point A with the first longitudinal arm point B, and set the crossbeam model according to the shear center point O. By setting in this way, the torsion beam model is more intuitive and beautiful.

[0051] In order to accurately test the torsion beam suspension, execute step S13. When the extraction instruction input by the user is obtained, control the 3D modeling software to extract the first longitudinal arm point, the first wheel center point and the shear center point to form a first rigid body, and the first plane is composed of the first longitudinal arm point, the first cross beam point and the shear center point; extract the second longitudinal arm point, the second wheel center point and the shear center point to form a second rigid body, and the second plane is composed of the second longitudinal arm point, the second cross beam point and the shear center point; wherein the first rigid body and the second rigid body are independent of each other; the first cross beam point and the second cross beam point of the cross beam model are respectively set in the first rigid body and the second rigid body, and the third cross beam point of the cross beam model is set at the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point.

[0052] Specifically, in this application, Figure 2 As shown, the CPU obtains the extraction instruction input by the user, and controls the 3D modeling software to extract the first longitudinal arm point B, the first wheel center point A and the shear center point O based on the extraction instruction to form a first rigid body, and the first longitudinal arm point, the first crossbeam point and the shear center point form a first plane; extract the second longitudinal arm point B1, the second wheel center point A1 and the shear center point to form a second rigid body, and the second longitudinal arm point, the second crossbeam point and the shear center point form a second plane. It should be noted that the first rigid body and the second rigid body are independent of each other. It should be noted that, in combination with Figure 3As shown, the first beam point C and the second beam point C1 of the above-mentioned beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point O1 of the beam model is arranged at the midpoint of the connecting line of the first longitudinal arm point B and the second longitudinal arm point B1, so that the torsion beam suspension model can achieve the test effect, and by being divided into two independent rigid bodies, that is, the movement of the first rigid body will not affect the second rigid body. In the process of testing, the two independent rigid bodies are used to make the data of the left and right wheel balance test and the roll motion test accurate.

[0053] It should be noted that the roll motion refers to the simulation of the torsion beam suspension rotating as a whole around an approximate roll axis by a certain angle (roll angle).

[0054] In order to better meet the core motion characteristics of the torsion beam suspension, in an optional embodiment, in step S13, the first beam point and the second beam point of the beam model are respectively set in the first rigid body and the second rigid body, and the third beam point of the beam model is set on the connecting line of the first longitudinal arm point and the second longitudinal arm point, including:

[0055] The first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the connection line between the third beam point and the shear center is perpendicular to the connection line between the first beam point and the second beam point.

[0056] The beam model includes a first beam point, a second beam point and a third beam point, wherein the first beam point and the second beam point are respectively arranged in the first rigid body and the second rigid body, that is, during the test, the first beam point and the second beam point are respectively made to slide in the first rigid body and the second rigid body, which can limit the vertical degree of freedom of the above-mentioned shear center point. In addition, by setting the third beam point at the midpoint of the center line connecting the first longitudinal arm point and the second longitudinal arm point, the line connecting the third beam point and the shear center point can be made perpendicular to the line connecting the first beam point and the second beam point. By setting in this way, the symmetry of the left and right wheels can be ensured during the test, thereby making the torsion beam suspension test more accurate and more in line with the core motion characteristics of the torsion beam suspension.

[0057] In order to reduce the error of the test, in an optional embodiment,

[0058] The first beam point and the second beam point form a beam straight line.

[0059] The first trailing arm point and the second trailing arm point form a trailing arm straight line.

[0060] The crossbeam line is parallel to the trailing arm line and has the same length.

[0061] The shear center point is located at the center of the beam line.

[0062] In this embodiment, the first cross beam point and the second cross beam point constitute a cross beam straight line, and the first longitudinal arm point and the second longitudinal arm point constitute a longitudinal arm straight line, wherein the shear center point is located at the center of the cross beam straight line, so that the first cross beam point and the second cross beam point are at the same distance from the shear center point, and the cross beam straight line and the longitudinal arm straight line are the same length and are parallel. Through such an arrangement, when performing a test, the test error can be made smaller due to the symmetry of the torsion beam suspension.

[0063] In order to make it more convenient for users to operate through software, without loss of generality, the following 3D modeling software takes CATIA as an example. In an optional embodiment, when the position information of multiple hard points input by the user is obtained, the 3D modeling software is controlled to model the torsion beam suspension to generate a first torsion beam suspension model, including:

[0064] When the position information of multiple hard points input by the user is obtained, the CATIA software is controlled to perform DMU modeling on the torsion beam suspension to generate a first torsion beam suspension model.

[0065] In this embodiment, the DMU model of the torsion beam suspension is modeled by CATIA software, so that the torsion beam suspension can be modeled by only one software for testing. Compared with the existing technology, the purpose of modeling and testing can be achieved without using multiple 3D modeling software, which makes the user operation more convenient, that is, there is no need for finite element software to generate a modal neutral file (mnf) from the torsion beam 3D data, which reduces the difficulty of operation for design engineers and reduces the modeling conversion time.

[0066] In order to facilitate user testing, step S15 is executed to control the 3D modeling software to construct a second torsion beam suspension model based on the first rigid body, the second rigid body and the crossbeam model.

[0067] Specifically, in the present application, after the torsion beam is split to generate the first rigid body and the second rigid body, the CPU controls the 3D modeling software to construct a second torsion beam suspension model based on the first rigid body, the second rigid body and the beam model. Through a new torsion beam suspension model, user testing is more intuitive and convenient.

[0068] Compared with the prior art, the present application models a torsion beam suspension that has been set, and divides the torsion beam into two independent first rigid bodies and second rigid bodies, that is, realizes the independent movement of the first rigid body and the second rigid body, and reflects the mutual influence between the two through internal mechanism constraints. Compared with the non-independent suspension in the prior art, the accuracy of the parallel jumping test of the left and right wheels, the single wheel jumping test and the rolling motion test can be better guaranteed.

[0069] In addition, by modeling the DMU model of the torsion beam suspension through CATIA software, the torsion beam suspension can be modeled through only one software. Compared with the existing technology, there is no need to use multiple software to achieve modeling and testing, making user operation more convenient.

[0070] Combination Figure 4 As shown, in order to better meet the chassis professional DMU motion verification requirements, in an optional embodiment, the first rigid body further includes: a first endpoint D, the second rigid body further includes a second endpoint D1, the first endpoint D, the second endpoint D1 and the shear center point O are combined into one, and the method further includes:

[0071] The first torsion beam suspension model also includes a first lifting drive plane M and a second lifting drive plane M1; wherein the first lifting drive plane M is a plane with the first wheel center point A as the first center point and perpendicular to the vertical line of the first center point, and the second lifting drive plane M1 is a plane with the second wheel center point A1 as the second center point and perpendicular to the vertical line of the second center point.

[0072] Get the second connection instruction of the user.

[0073] Based on the second connection instruction, the 3D modeling software is controlled to connect the first longitudinal arm point B and the second longitudinal arm point B1 with the spherical surface pair of the vehicle body respectively, connect the first endpoint D and the second endpoint D1 with the spherical surface pair of the shear center point O respectively, connect the first cross beam point A with the first plane point surface in the first rigid body, connect the second cross beam point C1 with the second plane point surface in the second rigid body, connect the line connecting the third cross beam point O1 and the shear center point O with the midpoint O1 of the line connecting the first longitudinal arm point and the second longitudinal arm point B1 by point-line connection, connect the first wheel center point A with the first lifting drive plane point surface, and connect the second wheel center point A1 with the second lifting drive plane point surface.

[0074] If the first torsion beam suspension model adopts wheel center driven suspension bounce (DMU model can also adopt shock absorber stroke drive), it includes a first lifting driving plane with the first wheel center point as the first center point and perpendicular to the vertical line of the first center point, and a second lifting driving plane with the second wheel center point as the second center point and perpendicular to the vertical line of the second center point. When the CPU obtains the second connection instruction from the user, it controls the 3D modeling software to connect the first longitudinal arm point and the second longitudinal arm point with the vehicle body spherical surface pair respectively, connect the first end point and the second end point with the shear center point spherical surface pair respectively, connect the first cross beam point with the first plane point surface in the first rigid body, connect the second cross beam point with the second plane point surface in the second rigid body, connect the third cross beam point with the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point by point-line connection, connect the first wheel center point with the first lifting driving plane point surface, and connect the second wheel center point with the second lifting driving plane point surface. In this way, 16 of the 18 degrees of freedom of each of the three components can be constrained, and the tire envelope overlap output by the ADAMS dynamics software (the torsion beam uses the modal neutral file mnf) is extremely high, which can meet the chassis professional DMU motion verification requirements.

[0075] Compared with the prior art, the present application models a torsion beam suspension that has been set, and divides the torsion beam into two independent first rigid bodies and second rigid bodies, that is, realizes the independent movement of the first rigid body and the second rigid body, and reflects the mutual influence between the two through internal mechanism constraints. Compared with the non-independent suspension in the prior art, the accuracy of the left and right wheel parallel jump test and the roll motion test can be better guaranteed.

[0076] In addition, by modeling the DMU model of the torsion beam suspension through CATIA software, the torsion beam suspension can be modeled through only one software. Compared with the existing technology, there is no need to use multiple software to achieve modeling and testing, making user operation more convenient.

[0077] In addition, through the joint connection between the various components, the freedom of each component is constrained, so that the tire envelope overlap with the output of ADAMS dynamics software (the torsion beam uses the modal neutral file) is extremely high, meeting the chassis professional DMU motion verification requirements.

[0078] In one embodiment, the present application also provides a modeling device for a torsion beam suspension, which may include:

[0079] The first control module 51 is used to control the 3D modeling software to model the torsion beam suspension and generate a first torsion beam suspension model when the position information of multiple hard points input by the user is obtained; wherein the multiple hard points at least include: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model at least includes the first wheel center point and the first longitudinal arm point, which are respectively mirror-symmetrical with the shear center as the symmetry point, the second wheel center point and the second longitudinal arm point and the crossbeam model; the crossbeam model includes the first crossbeam point, the second crossbeam point and the third crossbeam point; the extraction module 52 is used to control the 3D modeling software to extract the first longitudinal arm point, the first wheel center point and the second longitudinal arm point and the crossbeam model when the extraction instruction input by the user is obtained. Points and shear center points are used to form a first rigid body, and a first plane is formed by the first longitudinal arm point, the first beam point and the shear center point; the second longitudinal arm point, the second wheel center point and the shear center point are extracted to form a second rigid body, and a second plane is formed by the second longitudinal arm point, the second beam point and the shear center point; wherein the first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point of the beam model is arranged on the connecting line between the first longitudinal arm point and the second longitudinal arm point; a construction module 53 is used to control the 3D modeling software to form a second torsion beam suspension model based on the first rigid body, the second rigid body and the beam model.

[0080] Specifically, a central processing unit (CPU) can be used as the executor of the present application, and the CPU can establish a communication relationship with the 3D modeling software. When the CPU obtains the position information of multiple hard points input by the user, it should be noted that the multiple hard points include at least a first wheel center point, a first longitudinal arm point and a shear center point. The CPU controls the 3D modeling software to model the torsion beam suspension and generate a first torsion beam suspension model. It should be noted that the first torsion beam suspension model includes at least a first wheel center point and a first longitudinal arm point, a second wheel center point and a second longitudinal arm point, and a crossbeam model that are mirror-symmetrical with the shear center as a symmetry point.

[0081] It should be noted that the torsion beam suspension can be a torsion beam suspension that has been designed by the user before the user issues instructions to the CPU. After the torsion beam suspension is designed, multiple hard points of the torsion beam suspension are also determined, that is, the positions of the multiple hard points determined are also different according to the different torsion beam suspensions designed. Among them, the CPU obtains the extraction instruction input by the user, and controls the 3D modeling software to extract the first longitudinal arm point, the first wheel center point and the shear center point based on the extraction instruction to form a first rigid body, and the first longitudinal arm point, the first cross beam point and the shear center point form a first plane; extract the second longitudinal arm point, the second wheel center point and the shear center point to form a second rigid body, and the second longitudinal arm point, the second cross beam point and the shear center point form a second plane. It should be noted that the first rigid body and the second rigid body are independent of each other. It should be noted that the first beam point and the second beam point of the above-mentioned crossbeam model are respectively set in the first rigid body and the second rigid body, and the third beam point of the crossbeam model is set at the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point, so that the torsion beam suspension model can achieve the test effect, and by being divided into two independent rigid bodies, that is, the movement of the first rigid body will not affect the second rigid body. In the process of testing, the two independent rigid bodies make the left and right wheel balance test and the roll motion test data accurate. Among them, after the torsion beam is divided to generate the first rigid body and the second rigid body, the CPU controls the 3D modeling software to form a second torsion beam suspension model based on the first rigid body, the second rigid body and the crossbeam model. Through a new torsion beam suspension model, user testing is more intuitive and convenient.

[0082] Optionally, the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the connection line between the third beam point and the shear center is perpendicular to the connection line between the first beam point and the second beam point.

[0083] Specifically, the beam model includes a first beam point, a second beam point and a third beam point, wherein the first beam point and the second beam point are respectively arranged in the first rigid body and the second rigid body, that is, during the test, the first beam point and the second beam point are respectively made to slide in the first rigid body and the second rigid body, which can limit the vertical degree of freedom of the shear center point. In addition, by setting the third beam point on the midline of the first longitudinal arm point and the second longitudinal arm point, the line connecting the third beam point and the shear center point can be made perpendicular to the line connecting the first beam point and the second beam point. By setting in this way, the symmetry of the left and right wheels can be ensured during the test, thereby making the torsion beam suspension test more accurate and more in line with the core motion characteristics of the torsion beam suspension.

[0084] Optionally, the first control module 51 is also used to control the 3D modeling software to determine the second wheel center point and the second longitudinal arm point that are mirror-symmetrical about the shear center, respectively, after obtaining the position information of the first wheel center point, the first longitudinal arm point and the shear center point input by the user; obtain the user's first connection instruction; based on the first connection instruction, control the 3D modeling software to connect the shear center point with the first wheel center point, the first longitudinal arm point, the second wheel center point and the second longitudinal arm point, connect the second longitudinal arm point with the first longitudinal arm point and the second wheel center point, connect the first wheel center point with the first longitudinal arm point, and set the beam model according to the shear center point.

[0085] Specifically, after the 3D modeling software determines the above-mentioned first wheel center point, first longitudinal arm point, second wheel center point and second longitudinal arm point, the CPU obtains the first connection instruction issued by the user, and controls the 3D modeling software to connect the shear center point with the first wheel center point, the first longitudinal arm point, the second wheel center point and the second longitudinal arm point respectively, connect the second longitudinal arm point with the first longitudinal arm point and the second wheel center point respectively, connect the first wheel center point with the first longitudinal arm point, and set the crossbeam model according to the shear center point. By setting in this way, the torsion beam model is more beautiful and intuitive.

[0086] Optionally, the first rigid body also includes: a first endpoint, the second rigid body also includes a second endpoint, the first endpoint, the second endpoint and the shear center point are combined into one, and the device also includes: a connection module, used to obtain a second connection instruction from the user; a second control module, used to control the 3D modeling software to connect the first longitudinal arm point and the second longitudinal arm point with the spherical surface of the vehicle body respectively, connect the first endpoint and the second endpoint with the spherical surface of the shear center point respectively, connect the first beam point with the first plane point surface in the first rigid body, connect the second beam point with the second plane point surface in the second rigid body, connect the line connecting the third beam point and the shear center with the midpoint of the connecting line between the first longitudinal arm point and the second longitudinal arm point using point-line connection, connect the first wheel center point with the first lifting drive plane point surface, and connect the second wheel center point with the second lifting drive plane point surface.

[0087] The first torsion beam suspension model includes a plane with the first wheel center point as the first center point and perpendicular to the vertical line of the first center point, and a plane with the second wheel center point as the second center point and perpendicular to the vertical line of the second center point. When the CPU obtains the second connection instruction from the user, it controls the 3D modeling software to connect the first longitudinal arm point and the second longitudinal arm point to the spherical surface pair of the vehicle body respectively, connect the first end point and the second end point to the spherical surface pair of the shear center point respectively, connect the first cross beam point to the first plane point surface in the first rigid body, connect the second cross beam point to the second plane point surface in the second rigid body, connect the third cross beam point and the shear center connection line with the midpoint of the connection line between the first longitudinal arm point and the second longitudinal arm point by point-line connection, connect the first wheel center point to the first lifting drive plane point surface, and connect the second wheel center point to the second lifting drive plane point surface. In this way, 16 of the 18 degrees of freedom of each of the three components can be constrained, and the tire envelope overlap output by the ADAMS dynamics software (the torsion beam uses the modal neutral file mnf) is extremely high, which can meet the chassis professional DMU motion verification requirements.

[0088] Optionally, the first crossbeam point and the second crossbeam point constitute a crossbeam straight line; the first longitudinal arm point and the second longitudinal arm point constitute a longitudinal arm straight line; the crossbeam straight line is parallel to the longitudinal arm straight line and has the same length; the shear center point is located at the center of the crossbeam straight line.

[0089] In this embodiment, the first crossbeam point and the second crossbeam point constitute a crossbeam straight line, and the first longitudinal arm point and the second longitudinal arm point constitute a longitudinal arm straight line, wherein the shear center point is located at the center of the crossbeam straight line, so that the first crossbeam point and the second crossbeam point are at the same distance from the shear center point, and the crossbeam straight line and the longitudinal arm straight line have the same length. By setting it in this way, when performing a test, the test error can be made smaller due to the symmetry of the torsion beam suspension.

[0090] Optionally, the first control module is further used to control CATIA software to model the DMU model of the torsion beam suspension and generate a first torsion beam suspension model when obtaining the position information of multiple hard points input by the user.

[0091] The DMU model of the torsion beam suspension is modeled by CATIA software, which makes it possible to model the torsion beam suspension with only one software for testing. Compared with the existing technology, it is not necessary to use multiple 3D modeling software to achieve the purpose of modeling and testing, making it more convenient for users to operate.

[0092] Compared with the prior art, the present application models a torsion beam suspension that has been set, and divides the torsion beam into two independent first rigid bodies and second rigid bodies, that is, realizes the independent movement of the first rigid body and the second rigid body, and reflects the mutual influence between the two through internal mechanism constraints. Compared with the non-independent suspension in the prior art, the accuracy of the left and right wheel parallel jump test and the roll motion test can be better guaranteed.

[0093] In addition, by modeling the DMU model of the torsion beam suspension through CATIA software, the torsion beam suspension can be modeled through only one software. Compared with the existing technology, there is no need to use multiple software to achieve modeling and testing, making user operation more convenient.

[0094] In addition, through the joint connection between the various components, the freedom of each component is constrained, so that the tire envelope overlap with the output of ADAMS dynamics software (the torsion beam uses the modal neutral file) is extremely high, meeting the chassis professional DMU motion verification requirements.

[0095] It should be understood that the specific features, operations and details described hereinabove with respect to the method of the present application may also be similarly applied to the device and system of the present application, or vice versa. In addition, each step of the method of the present application described above may be performed by a corresponding component or unit of the device or system of the present application.

[0096] It should be understood that the various modules / units of the device of the present application can be implemented in whole or in part by software, hardware, firmware or a combination thereof. Each of the modules / units can be embedded in the processor of the computer device in the form of hardware or firmware or independent of the processor, or can be stored in the memory of the computer device in the form of software for the processor to call to perform the operation of each module / unit. Each of the modules / units can be implemented as an independent component or module, or two or more modules / units can be implemented as a single component or module.

[0097] In one embodiment, a computer device is provided, which includes a memory and a processor, wherein the memory stores computer instructions executable by the processor, and the computer instructions instruct the processor to execute each step of the method of the present application when executed by the processor. The computer device can be a server, a terminal, or any other electronic device with necessary computing and / or processing capabilities in a broad sense. In one embodiment, the computer device may include a processor, a memory, a network interface, a communication interface, etc. connected via a system bus. The processor of the computer device can be used to provide necessary computing, processing and / or control capabilities. The memory of the computer device may include a non-volatile storage medium and an internal memory. An operating system, a computer program, etc. may be stored in or on the non-volatile storage medium. The internal memory can provide an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface and the communication interface of the computer device can be used to connect and communicate with external devices via a network.

[0098] The present application can be implemented as a computer-readable storage medium having a computer program stored thereon, which causes the steps of the method of the present application to be executed when executed by a processor. In one embodiment, the computer program is distributed on a plurality of computer devices or processors coupled to a network so that the computer program is stored, accessed and executed in a distributed manner by one or more computer devices or processors. A single method step / operation, or two or more method steps / operations, can be performed by a single computer device or processor or by two or more computer devices or processors. One or more method steps / operations can be performed by one or more computer devices or processors, and one or more other method steps / operations can be performed by one or more other computer devices or processors. One or more computer devices or processors can perform a single method step / operation, or perform two or more method steps / operations.

[0099] It will be appreciated by a person of ordinary skill in the art that the steps of the method of the present application can be performed by instructing related hardware such as a computer device or a processor through a computer program, and the computer program can be stored in a non-temporary computer-readable storage medium, and the computer program causes the steps of the method of the present application to be performed when it is executed. Depending on the circumstances, any reference to memory, storage, database or other media herein may include non-volatile and / or volatile memory. Examples of non-volatile memory include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid state disk, etc. Examples of volatile memory include random access memory (RAM), external cache memory, etc.

[0100] The various technical features described above can be combined arbitrarily. Although all possible combinations of these technical features are not described, any combination of these technical features should be considered to be covered by this specification as long as there is no contradiction in such combination.

[0101] Although the present application is described in conjunction with the embodiments, it should be understood by those skilled in the art that the above description and the accompanying drawings are only exemplary and non-restrictive, and the present application is not limited to the disclosed embodiments. Various modifications and variations are possible without departing from the spirit of the present application.

Claims

1. A modeling method for a torsion beam suspension, characterized in that: The method comprises: When the position information of the plurality of hard points input by the user is obtained, the 3D modeling software is controlled to model the torsion beam suspension to generate a first torsion beam suspension model; The plurality of hard points at least include: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model at least includes a first wheel center point and a first longitudinal arm point, a second wheel center point and a second longitudinal arm point and a beam model that are mirror-symmetrical with the shear center point as a symmetry point; the beam model includes a first beam point, a second beam point and a third beam point; In the case of obtaining the extraction instruction input by the user, the 3D modeling software is controlled to extract the first longitudinal arm point, the first wheel center point and the shear center point to form a first rigid body, and the first plane is formed by the first longitudinal arm point, the first beam point and the shear center point; the second longitudinal arm point, the second wheel center point and the shear center point are extracted to form a second rigid body, and the second plane is formed by the second longitudinal arm point, the second beam point and the shear center point; wherein the first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively set in the first rigid body and the second rigid body, and the third beam point of the beam model is set at the midpoint of the connecting line of the first longitudinal arm point and the second longitudinal arm point; Based on the first rigid body, the second rigid body and the crossbeam model, the 3D modeling software is controlled to form a second torsion beam suspension model.

2. The modeling method of the torsion beam suspension according to claim 1, characterized in that: The first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point of the beam model is arranged at the midpoint of the connecting line of the first longitudinal arm point and the second longitudinal arm point, including: The first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the connecting line of the third beam point and the shear center is perpendicular to the connecting line of the first beam point and the second beam point.

3. The modeling method of the torsion beam suspension according to claim 1, characterized in that: In the case of obtaining the position information of multiple hard points input by the user, the 3D modeling software is controlled to model the torsion beam suspension to generate a first torsion beam suspension model; wherein the multiple hard points at least include: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model at least includes the first wheel center point and the first longitudinal arm point, and the second wheel center point and the second longitudinal arm point and the crossbeam model are mirror-symmetrical with the shear center point as the symmetry point, including: When the position information of the first wheel center point, the first longitudinal arm point and the shear center point input by the user is obtained, the 3D modeling software is controlled to determine the second wheel center point and the second longitudinal arm point which are mirror-symmetrical with the shear center as the symmetry point of the first wheel center point and the first longitudinal arm point; Obtaining the user's first connection instruction; Based on the first connection instruction, in order to make the model more intuitive, the 3D modeling software is controlled to connect the shear center point with the first wheel center point, the first longitudinal arm point, the second wheel center point and the second longitudinal arm point respectively, and the second longitudinal arm point is connected with the first longitudinal arm point and the second wheel center point respectively, and the first wheel center point is connected with the first longitudinal arm point, and the crossbeam model is set according to the shear center point.

4. The modeling method of a torsion beam suspension according to claim 1, characterized in that: The first rigid body further includes: a first endpoint, the second rigid body further includes a second endpoint, the first endpoint, the second endpoint and the shear center point are combined into one, and the method further includes: The first torsion beam suspension model further includes a first lifting driving plane and a second lifting driving plane; wherein the first lifting driving plane is a plane with the first wheel center point as a first center point and perpendicular to a vertical line of the first center point, and the second lifting driving plane is a plane with the second wheel center point as a second center point and perpendicular to a vertical line of the second center point; Obtaining a second connection instruction from the user; Based on the second connection instruction, the 3D modeling software is controlled to connect the first longitudinal arm point and the second longitudinal arm point with the spherical surface pair of the vehicle body respectively, connect the first endpoint and the second endpoint with the spherical surface pair of the shear center point respectively, connect the first cross beam point with the first plane point surface in the first rigid body, connect the second cross beam point with the second plane point surface in the second rigid body, connect the third cross beam point and the shear center connection line with the midpoint of the connection line between the first longitudinal arm point and the second longitudinal arm point using a point curve, connect the first wheel center point with the first lifting drive plane point surface, and connect the second wheel center point with the second lifting drive plane point surface.

5. The modeling method of a torsion beam suspension according to claim 1, characterized in that: The first beam point and the second beam point form a beam straight line; The first longitudinal arm point and the second longitudinal arm point form a longitudinal arm straight line; The cross beam straight line is parallel to the longitudinal arm straight line and has the same length; The shear center point is located at the center of the straight line of the beam.

6. The modeling method of a torsion beam suspension according to any one of claims 1 to 5, characterized in that: In the case of obtaining the position information of the multiple hard points input by the user, controlling the 3D modeling software to model the torsion beam suspension to generate a first torsion beam suspension model, including: When the position information of multiple hard points input by the user is obtained, the CATIA software is controlled to perform DMU modeling on the torsion beam suspension to generate a first torsion beam suspension model.

7. A modeling device for a torsion beam suspension, characterized in that: The device comprises: A first control module is used to control the 3D modeling software to model the torsion beam suspension and generate a first torsion beam suspension model when the position information of the multiple hard points input by the user is obtained; The plurality of hard points at least include: a first wheel center point, a first longitudinal arm point and a shear center point; the first torsion beam suspension model at least includes a first wheel center point and a first longitudinal arm point, a second wheel center point and a second longitudinal arm point and a beam model that are mirror-symmetrical with the shear center point as a symmetry point; the beam model includes a first beam point, a second beam point and a third beam point; An extraction module is used to control the 3D modeling software to extract the first longitudinal arm point, the first wheel center point and the shear center point to form a first rigid body, and the first plane is formed by the first longitudinal arm point, the first beam point and the shear center point; extract the second longitudinal arm point, the second wheel center point and the shear center point to form a second rigid body, and the second plane is formed by the second longitudinal arm point, the second beam point and the shear center point; wherein the first rigid body and the second rigid body are independent of each other; the first beam point and the second beam point of the beam model are respectively set in the first rigid body and the second rigid body, and the third beam point of the beam model is set at the midpoint of the connecting line of the first longitudinal arm point and the second longitudinal arm point; A construction module is used to control 3D modeling software to construct a second torsion beam suspension model based on the first rigid body, the second rigid body and the crossbeam model.

8. The modeling device for a torsion beam suspension according to claim 7, characterized in that: The first beam point and the second beam point of the beam model are respectively arranged in the first rigid body and the second rigid body, and the third beam point of the beam model is arranged at the midpoint of the center line connecting the first longitudinal arm point and the second longitudinal arm point, so that the connecting line between the third beam point and the shear center is perpendicular to the connecting line between the first beam point and the second beam point.

9. An electronic device, characterized in that: The electronic device comprises: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the modeling method of the torsion beam suspension according to any one of claims 1-6 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the modeling method of the torsion beam suspension according to any one of claims 1 to 6 is implemented.

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