Modeling and KC analysis method for double-front-axle balanced suspension

Abstract

The invention provides a modeling and KC analysis method for a double-front-axle balanced suspension. The modeling method comprises the steps that the structural form of the double-front-axle balanced suspension is determined; constructing a plate spring model of the double-front-axle balanced suspension; under the structural form, hard point coordinates in the double-front-axle balanced suspension are determined; and establishing the hard point coordinates in the plate spring model to obtain a corresponding balance connecting rod model, and assembling the balance connecting rod model to obtain an assembly body model of the double-front-axle balanced suspension. The KC analysis method comprises the following steps: newly adding a first-bridge and second-bridge reverse jumping working condition in a KC analysis project; and performing KC analysis on the assembly model of the double-front-axle balanced suspension on the basis of the first and second axle reverse jumping working condition to obtain a KC performance index of the assembly model under the first and second axle reverse jumping working condition. By means of the method and device, the defects existing in modeling and KC analysis modes of double-front-axle balanced suspensions and vehicle suspensions in the prior art are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of suspensions, and in particular to a modeling and KC analysis method for a double front axle balance suspension. Background Art

[0002] The double front axle balance suspension can ensure that the front axle wheels are all in contact with the ground when the vehicle is driving on an uneven road surface, and has the advantages of small dynamic load change, small impact on the road surface, and balanced force on the two axles. However, during actual vehicle driving, problems such as steering wheel shaking and brake locking on bumpy roads are likely to occur, affecting driving safety. The kinematics and compliance (KC) characteristics of the suspension are closely related to the vehicle performance. Conducting KC simulation analysis on the vehicle suspension in the early stage of design can preliminarily understand the vehicle performance and guide the suspension design at the same time.

[0003] At present, the research on the double front axle balance suspension mainly focuses on the structural layout. On the one hand, the modeling of the vehicle suspension lacks the research on the structural characteristics of the suspension. At present, there are many problems with the double front axle balance suspension vehicles, so it is particularly important to model and analyze the performance of this type of suspension. On the other hand, although the existing common KC simulations, such as bounce simulation, roll simulation, etc., have covered most of the vehicle driving conditions, for the double front axle balance suspension, the movement correlation between the first and second axles is an important item in the simulation. Therefore, the existing KC analysis methods need to be improved. Summary of the Invention

[0004] The present invention provides a modeling and KC analysis method for a double front axle balance suspension to overcome the defects existing in the modeling and KC analysis methods of the vehicle suspension for the double front axle balance suspension in the prior art.

[0005] The present invention provides a modeling method for a double front axle balance suspension, including: Determine the structural form of the double front axle balance suspension, where the structural form includes a first connection type and a second connection type. The first connection type is a connection form according to the first axle hanger, balance bar, and second axle hanger, and the second connection type is a connection form according to the first axle hanger, first axle swing arm, tie rod, second axle swing arm, and second axle hanger; Construct a leaf spring model of the double front axle balance suspension; Under the structural form, determine the hard point coordinates in the double front axle balance suspension; Establish the hard point coordinates in the leaf spring model to obtain a corresponding balance link model, and assemble the balance link model to obtain an assembly model of the double front axle balance suspension.

[0006] In some embodiments, the determining the hard point coordinates in the double front axle balance suspension under the structural form includes: Under the first connection mode, the coordinate of the connection point between a shaft hanger and the balance bar, the coordinate of the installation point of the balance bar on the vehicle frame, and the coordinate of the connection point between the balance bar and the second shaft hanger are determined as the hard point coordinates in the double front axle balance suspension; Under the second connection mode, the coordinate of the connection point between the first shaft hanger and the first shaft swing arm, the first installation point coordinate of the first shaft swing arm on the vehicle frame, the coordinate of the connection point between the first shaft swing arm and the pull rod, the coordinate of the connection point between the pull rod and the second shaft swing arm, and the coordinate of the connection point between the second shaft swing arm and the second shaft hanger are determined as the hard point coordinates in the double front axle balance suspension.

[0007] In some embodiments, when the hard point coordinates are the hard point coordinates determined under the first connection mode, establishing the hard point coordinates in the leaf spring model to obtain the corresponding balance link model includes: In the leaf spring model, a new component is created as the balance link at the coordinate of the installation point of the balance bar on the vehicle frame, and a new mounting part is created to connect the balance link to the vehicle frame; A revolute pair is established at the installation point coordinate to connect the balance link and the mounting part, obtaining the corresponding balance link model.

[0008] In some embodiments, when the hard point coordinates are the hard point coordinates determined under the second connection mode, establishing the hard point coordinates in the leaf spring model to obtain the corresponding balance link model includes: In the leaf spring model, a first shaft swing arm component, a second shaft swing arm component, and a pull rod component are respectively established at the first installation point coordinate of the first shaft swing arm on the vehicle frame, the second installation point coordinate of the second shaft swing arm on the vehicle frame, and the midpoint coordinate between the first installation point coordinate and the second installation point coordinate; A first mounting part and a second mounting part are respectively constructed at the first installation point coordinate and the second installation point coordinate, and the first shaft swing arm is connected to the vehicle frame through the first mounting part, and the second shaft swing arm is connected to the vehicle frame through the second mounting part; A kinematic pair is established at the first installation point coordinate to connect the first mounting part and the first shaft swing arm component, and a kinematic pair is established at the second installation point coordinate to connect the second mounting part and the second shaft swing arm component, obtaining the corresponding balance link model.

[0009] The present invention also provides a KC analysis method for a double front axle balance suspension, including: Adding a reverse bounce condition of the first and second axles in the KC analysis item; Based on the reverse bounce condition of the first and second axles, performing KC analysis on the assembly model of the double front axle balance suspension to obtain the KC performance index of the assembly model under the reverse bounce condition of the first and second axles; Among them, the KC performance indicators include the gradient change indicator of the balance swing arm's jumping angle and the axle load ratio indicator. The axle load ratio indicator is the ratio of the axle load of one axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by using the modeling method of the double front axle balance suspension according to any one of the above claims 1-4.

[0010] In some embodiments, the method further includes: Determining the abnormal items of the assembly model according to the KC performance indicators, where the abnormal items are the KC performance indicators whose difference value between the KC performance indicators and the normal indicators is greater than a preset threshold; Determining the problem points of the double front axle balance suspension corresponding to the actual vehicle according to the abnormal items; Adjusting the hard point coordinates or the structural form of the double front axle balance suspension according to the problem points to eliminate the problem points.

[0011] In some embodiments, the method further includes: Taking the front end length of the balance swing arm, the balance swing arm angle, the initial angle of the balance swing arm, and the installation height of the balance swing arm in the KC analysis items as the optimization design variables, and taking the axle load ratio indicator and the pre-speed gradient indicator in the KC performance indicators as the optimization response variables; Creating an optimization experiment according to the optimization design variables and the optimization response variables, and determining the fitting correlation relationship between the optimization design variables and the optimization response variables in the optimization experiment; Performing a system simulation experiment according to the fitting correlation relationship to obtain a sensitivity file; Determining the true correlation relationship between the optimization design variables and the optimization response variables according to the sensitivity file; Adjusting the double front axle balance suspension based on the true correlation relationship.

[0012] The present invention also provides a modeling device for a double front axle balance suspension, including: A first determination module for determining the structural form of the double front axle balance suspension. The structural form includes a first connection type and a second connection type. The first connection type is a connection form according to the one-axle hanger, balance rod, and second-axle hanger, and the second connection type is a connection form according to the one-axle hanger, one-axle swing arm, tie rod, second-axle swing arm, and second-axle hanger; A construction module for constructing the leaf spring model of the double front axle balance suspension; A second determination module for determining the hard point coordinates in the double front axle balance suspension under the structural form; A modeling module for establishing the hard point coordinates in the leaf spring model to obtain a corresponding balance link model, and assembling the balance link model to obtain the assembly model of the double front axle balance suspension.

[0013] The present invention also provides a KC analysis device for a double front axle balance suspension, comprising: A new module, configured to add a reverse bounce condition of the first and second axles in the KC analysis project; An analysis module, configured to perform KC analysis on the assembly model of the double front axle balance suspension based on the reverse bounce condition of the first and second axles, so as to obtain the KC performance indexes of the assembly model under the reverse bounce condition of the first and second axles; Wherein, the KC performance indexes include a change index of the bounce rotation angle gradient of the balance swing arm and an axle load ratio index, the axle load ratio index is the ratio of the axle load of the first axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by using the modeling method of the double front axle balance suspension according to any one of the above embodiments.

[0014] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the computer program, the modeling method of the double front axle balance suspension and the KC analysis method of the double front axle balance suspension as described in any one of the above are implemented.

[0015] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the modeling method of the double front axle balance suspension and the KC analysis method of the double front axle balance suspension as described in any one of the above are implemented.

[0016] The present invention also provides a computer program product, comprising a computer program, and when the computer program is executed by a processor, the modeling method of the double front axle balance suspension and the KC analysis method of the double front axle balance suspension as described in any one of the above are implemented.

[0017] The modeling and KC analysis method of the double front axle balance suspension provided by the present invention has the following beneficial effects: On the one hand, when modeling, two structural forms of the double front axle balance suspension are first determined, and leaf spring models are respectively constructed under the two structural forms, and then an assembly model of the double front axle balance suspension is modeled, so as to realize modeling of the double front axle balance suspension of the vehicle in terms of structural characteristics, and thus it is easier to determine the motion state of the suspension for improvement during subsequent KC analysis.

[0018] On the other hand, when performing KC analysis, a new item of the reverse bounce condition of the first and second axles is added, which can balance the characteristics of the suspension linkage, analyze the index changes during the reverse bounce of the two axles, and is suitable for bumpy road conditions. In addition, by adding new indicators of the change gradient of the balance swing arm bounce angle and the axle load ratio to improve the KC indicators, it is possible to comprehensively analyze the impact of the movement of the double front axle balance suspension on vehicle performance and structure, analyze vehicle problems from the suspension level, clarify the direction of problem-solving, and facilitate the elimination of vehicle problems by adjusting the double front axle balance suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art one by one. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic flow chart of the modeling method for the double front axle balance suspension provided by the present invention.

[0021] Figure 2 It is one of the schematic structural diagrams of the double front axle balance suspension provided by the present invention.

[0022] Figure 3 It is another schematic structural diagram of the double front axle balance suspension provided by the present invention.

[0023] Figure 4 It is the effect diagram of the assembly model of the double front axle balance suspension provided by the present invention.

[0024] Figure 5 It is a schematic flow chart of the KC analysis method for the double front axle balance suspension provided by the present invention.

[0025] Figure 6 It is a schematic diagram of the change of the axle load ratio during reverse bounce provided by the present invention.

[0026] Figure 7 It is a schematic diagram of the sensitivity of each design parameter of the balance swing arm to the axle load ratio provided by the present invention.

[0027] Figure 8 It is a schematic structural diagram of the modeling device for the double front axle balance suspension provided by the present invention.

[0028] Figure 9 It is a schematic structural diagram of the KC analysis device for the double front axle balance suspension provided by the present invention.

[0029] Figure 10 It is a schematic structural diagram of the electronic device provided by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS: 22: One - axle hanger; 23: Balance bar; 24: Balance bar bracket; 25: Second - axle leaf spring; 26: Second - axle hanger; 31: First - axle leaf spring; 33: First - axle swing arm; 34: First - axle swing arm support; 35: Tie rod; 37: Second - axle swing arm; 39: Second - axle swing arm support. Specific embodiments

[0031] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] The following describes the modeling and KC analysis methods of the double - front - axle balanced suspension of the present invention with reference to the drawings. Figure 1 It is one of the flow schematic diagrams of the modeling method of the double - front - axle balanced suspension provided by the present invention. As Figure 1 shown, this method includes the following steps 101 to 104, which will be specifically described below.

[0033] Step 101: Determine the structural form of the double - front - axle balanced suspension.

[0034] In a vehicle, there are various structural forms of the double - front - axle balanced suspension. The double - front - axle balanced suspension is specifically composed of components such as hangers, swing arms, and tie rods. The structural forms in the embodiments of the present invention include the first connection type and the second connection type. Among them, the first connection type is the form of connecting according to the one - axle hanger, balance bar, and second - axle hanger, and the second connection type is the form of connecting according to the one - axle hanger, one - axle swing arm, tie rod, second - axle swing arm, and second - axle hanger.

[0035] As Figure 2 shown, Figure 2 It is one of the structural schematic diagrams of the double - front - axle balanced suspension provided by the present invention. In the first connection type, the double - front - axle balanced suspension is composed of a one - axle hanger 22, a balance bar 23, a second - axle hanger 26, a first - axle leaf spring 21, a balance bar bracket 24, and a second - axle leaf spring 25. Among them, there are three balance bar brackets 24. The specific connection method of each part is that the first - axle leaf spring 21 is connected to the balance bar bracket 24, and the first - axle leaf spring 21 is also connected to the one - axle hanger 22, the one - axle hanger 22 is connected to the balance bar 23, the balance bar 23 is connected to the second - axle hanger 26 through the second - axle leaf spring 25, the second - axle hanger 26 is also connected to the balance bar bracket 24, and the balance bar 23 is connected to the balance bar bracket 24. In this way, the double - front - axle balanced suspension of the first connection type is obtained.

[0036] As Figure 3 shown, Figure 3FIG. 0 is one of the schematic structural diagrams of the double front axle balance suspension provided by the present invention. In the second connection type, the double front axle balance suspension includes a first axle leaf spring 31, a first axle hanger 22, a first axle swing arm 33, a first axle swing arm support 34, a tie rod 35, a second axle leaf spring 25, a second axle swing arm 37, a second axle hanger 26, and a second axle swing arm support 39. The specific connection method is that the first axle leaf spring 31 is connected to the first axle hanger 22, the first axle hanger 22 is connected to the first axle swing arm 33, the first axle swing arm 33 is connected to the second axle swing arm 37 through the tie rod 35, the second axle leaf spring 25 is connected to the second axle hanger 26, the second axle hanger 26 is connected to the second axle swing arm 37, the first axle swing arm 33 is connected to the first axle swing arm support 34, and the second axle swing arm 37 is connected to the second axle swing arm support 39. In this way, the double front axle balance suspension of the second connection type is obtained.

[0037] Step 102: Construct a leaf spring model of the double front axle balance suspension.

[0038] Next, construct a leaf spring model of the double front axle balance suspension in the same way as constructing an ordinary suspension, specifically including a steering model, a first and second axle leaf spring model, and two front axle models, and at the same time set up the communicator in the model. The construction method can be implemented by using the software of Automatic Dynamic Analysis of Mechanical Systems (Adams). Unless otherwise defined, the first and second axles in the embodiments of the present invention both represent the first axle and the second axle, representing the double front axles of the balance suspension.

[0039] Step 103: Determine the hard point coordinates in the double front axle balance suspension in the structural form.

[0040] In order to integrate the structural form of the double front axle balance suspension into the leaf spring model, it is necessary to determine the hard point coordinates in the double front axle balance suspension in the corresponding structural form. Hard points are key control points, lines, surfaces or structural features determined to ensure the coordination and assembly relationship between components and meet the styling requirements. The hard point coordinates in the embodiments of the present invention are the connection points between the structural parts of the double front axle balance suspension. Here, the corresponding hard points can be identified one by one in the Adams software, and then the corresponding hard point coordinates can be determined.

[0041] Step 104: Establish hard point coordinates in the leaf spring model to obtain a corresponding balance link model, and assemble the balance link model to obtain an assembly model of the double front axle balance suspension.

[0042] Here, establish hard point coordinates in the leaf spring model, and create corresponding components at the hard point coordinates. These components are used to represent the parts included in the double front axle balance suspension in the corresponding structural form in the leaf spring model. Taking the first connection type as an example, the newly created components are such as Figure 2 the balance rod 23 in, and in addition, it is necessary to construct mounting parts, such asFigure 2 The balance bar bracket 24 therein is used to connect the balance bar 23 to the vehicle frame and establish a rotating pair at the connection between the mounting part and the first axle hanger 22 and the second axle hanger 26.

[0043] Through the newly created components and the constructed mounting parts, the structural form of the double front axle balance suspension can be reflected in the leaf spring model, and the corresponding balance link model can be obtained. Next, the parts in the balance link model are assembled, and finally the assembly model corresponding to the double front axle balance suspension is obtained. The specific effect schematic diagram can be as Figure 4 shown.

[0044] In the embodiment of the present invention, when modeling, the two structural forms of the double front axle balance suspension are first determined, and the hard point coordinates are respectively determined under the two structural forms and deployed into the leaf spring model, and then the assembly model of the double front axle balance suspension is modeled, realizing the modeling of the double front axle balance suspension of the vehicle in terms of structural characteristics, so that it is easier to determine the motion state of the suspension for improvement during the subsequent KC analysis.

[0045] In the above embodiment, it is necessary to determine the hard point coordinates in the double front axle balance suspension under the structural form. The hard points characterize the connection relationships of the components in the double front axle balance suspension. The process of determining the hard point coordinates under each structural form is introduced one by one below.

[0046] In the first connection type, the connection point coordinates of the first axle hanger and the balance bar, the mounting point coordinates of the balance bar on the vehicle frame, and the connection point coordinates of the balance bar and the second axle hanger are determined as the hard point coordinates in the double front axle balance suspension.

[0047] Here, as Figure 2 shown, the first axle leaf spring 21 is connected to the balance bar bracket 24, and the connection point is A. The first axle leaf spring 21 is connected to the first axle hanger 22, and the connection point is B. The first axle hanger 22 is connected to the balance bar 23, and the connection points are C. The balance bar 23 is connected to the second axle hanger 26 by connecting the second axle leaf spring 25, and the connection points are E and G respectively. The balance bar 23 is connected to the balance bar bracket 24, and the connection point is D. The second axle hanger 26 is connected to the balance bar bracket 24, and the connection point is F. In the embodiment of the present invention, the connection point C between the first axle hanger 22 and the balance bar 23, the mounting point of the balance bar 23 on the vehicle frame (i.e., the connection point D), and the connection point G between the balance bar 23 and the second axle hanger 26 are used as the hard points in the first connection type, and the coordinates of the connection points C, D, and G are respectively determined as the hard point coordinates in the Adams software.

[0048] Under the second connection type, the coordinate of the connection point between a shaft ear and a shaft swing arm, the coordinate of the first installation point of the shaft swing arm on the vehicle frame, the coordinate of the connection point between the shaft swing arm and the pull rod, the coordinate of the connection point between the pull rod and the second shaft swing arm, and the coordinate of the connection point between the second shaft swing arm and the second shaft ear are determined as the hard point coordinates in the double front axle balance suspension.

[0049] As Figure 3 shown, the first axle leaf spring 31 is connected to the balance bar, and the connection point is H. The first axle leaf spring 31 is connected to the first axle ear 22, and the connection point is I. The first axle ear 22 is connected to the first axle swing arm 33, and the connection point is J. The first axle swing arm 33 is connected to the second axle swing arm 37 through the pull rod 35, and the connection points are L and M respectively. The second axle leaf spring 25 is connected to the balance bar, and the connection point is Q. The second axle leaf spring 25 is also connected to the second axle ear 26, and the connection point is P. The second axle ear 26 is connected to the second axle swing arm 37, and the connection point is O. The first axle swing arm 33 is connected to the first axle swing arm support 34, and the connection point is K. The second axle swing arm 37 is connected to the second axle swing arm support 39, and the connection point is N. In the embodiment of the present invention, the connection point J between the first axle ear 22 and the first axle swing arm 33, the first installation point of the first axle swing arm 33 on the vehicle frame (i.e., the connection point K), the connection point L between the first axle swing arm 33 and the pull rod 35, the connection point M between the pull rod 35 and the second axle swing arm 37, and the connection point O between the second axle swing arm 37 and the second axle ear 26 are used as the hard points under the first connection type, and the coordinates of the connection points J, K, L, M, and O are respectively determined as the hard point coordinates in the Adams software.

[0050] Examples of some hard point coordinates determined under the two structural forms are as follows in Table 1: Table 1:

[0051] In the embodiment of the present invention, when modeling the double front axle balance suspension, the corresponding hard points are determined respectively for different structural forms, realizing the hard point identification under the conditions of different structural characteristics of the suspension, and laying a foundation for the subsequent construction of the balance link model.

[0052] Further, in the above embodiment, after determining the hard points of the double front axle balance suspension under different structural forms, next, it is necessary to determine the coordinate positions of these hard points in the constructed leaf spring model for constructing the balance link model.

[0053] Specifically, when the hard point coordinates are the hard point coordinates determined under the first connection type, hard point coordinates are established in the leaf spring model to obtain the corresponding balance link model, including: In the leaf spring model, a new component is created as the balance link at the coordinate of the installation point of the balance bar on the vehicle frame, and a new mounting part is created to connect the balance link to the vehicle frame; At the installation point coordinates, a rotating pair is established to connect the balance link with the installation part, obtaining the corresponding balance link model.

[0054] Here, for the leaf spring model in Adams software, first, a new part is created at the installation point coordinates of the balance bar on the vehicle frame as the balance link. The installation point of the balance bar on the vehicle frame is also the Figure 2 connection point D in []. By adding a new part in Adams software and defining it as the balance link, then a new installation part is created to connect the balance link with the vehicle frame. This installation part is the newly added mount part in Adams software, specifically representing Figure 2 the balance bar bracket 24 shown in []. Finally, at the coordinate position of the connection point D, a rotating pair is established to connect the newly created balance link with the installation part, obtaining the corresponding balance link model. And other parts are added to the corresponding leaf spring model according to the Figure 2 corresponding structural form for subsequent assembly to obtain the corresponding assembly model.

[0055] In the embodiment of the present invention, under the first connection type, parts such as the balance bar are arranged on the leaf spring model according to the corresponding hard points, so that the structural form of the suspension can be reflected in the leaf spring model, which is beneficial to observing the motion state of the suspension and improving the modeling effect under the structural form.

[0056] And when the hard point coordinates are the hard point coordinates determined under the second connection type, the hard point coordinates are established in the leaf spring model to obtain the corresponding balance link model, including: In the leaf spring model, a first axle swing arm part, a second axle swing arm part, and a tie rod part are respectively established at the first installation point coordinates of the first axle swing arm on the vehicle frame, the second installation point coordinates of the second axle swing arm on the vehicle frame, and the midpoint coordinates between the first installation point coordinates and the second installation point coordinates; At the first installation point coordinates and the second installation point coordinates, a first installation part and a second installation part are respectively constructed, and the first axle swing arm is connected to the vehicle frame through the first installation part, and the second axle swing arm is connected to the vehicle frame through the second installation part; At the first installation point coordinates, a kinematic pair is established to connect the first installation part with the first axle swing arm part, and at the second installation point coordinates, a kinematic pair is established to connect the second installation part with the second axle swing arm part, obtaining the corresponding balance link model.

[0057] Here, for the leaf spring model in Adams software, first, a first axle swing arm part is established at the first installation point coordinates of the first axle swing arm on the vehicle frame, that is, in Figure 3In [the above], at the coordinates of the first mounting point (connection point K) of the first-axis swing arm 33 on the vehicle frame, a first-axis swing arm component is established by creating a new component in Adams software and defining it as the first-axis swing arm component. At the coordinates of the second mounting point (connection point N) of the second-axis swing arm 37 on the vehicle frame, a second-axis swing arm component is established, and correspondingly, a tie rod component is established at the midpoint coordinates between connection point K and connection point N. The establishment methods are all to create new components in Adams software and define them as the second-axis swing arm component and the tie rod component respectively.

[0058] Next, at the coordinates of the first mounting point (connection point K) and the second mounting point (connection point N) respectively, new mount parts are added as the first mounting component and the second mounting component, which respectively represent Figure 3 the first-axis swing arm support 34 and the second-axis swing arm support 39 shown in the figure. Then, the first-axis swing arm is connected to the vehicle frame through the first mounting component, and the second-axis swing arm is connected to the vehicle frame through the second mounting component.

[0059] Finally, similar to the first connection method, at the coordinates of connection point K, a kinematic pair is established to connect the first mounting component and the first-axis swing arm component, and at the coordinates of connection point N, a kinematic pair is established to connect the second mounting component and the second-axis swing arm component, obtaining the corresponding balance link model. And other parts are added to the corresponding leaf spring model according to Figure 3 the corresponding structural form for subsequent assembly to obtain the corresponding assembly model.

[0060] In the embodiment of the present invention, under the second connection method, parts such as the balance bar are arranged on the leaf spring model according to the corresponding hard points, so that the structural form of the suspension can be reflected in the leaf spring model, which is beneficial to observing the motion state of the suspension and improving the modeling effect under the structural form. And this balance link model is different from the balance link model under the above-mentioned first connection method, so that the finally constructed assembly model can both refer to each other and be combined with each other, so that the motion state of the suspension can be accurately grasped under different structural characteristics.

[0061] By modeling the double front axle balance suspension under different structural forms through the above embodiments, the motion state of the vehicle can be effectively grasped. However, to actually master the influence of the double front axle balance suspension on the overall performance, KC analysis needs to be carried out on the double front axle balance suspension. Therefore, the embodiment of the present invention also provides a KC analysis method for the double front axle balance suspension, and KC analysis is performed on the assembly model of the double front axle balance suspension constructed in any of the above embodiments.

[0062] Figure 5 is one of the flow schematic diagrams of the modeling method of the double front axle balance suspension provided by the present invention. As Figure 5 shown, the KC analysis method of the double front axle balance suspension includes the following steps 201 to step 202, which are specifically described below.

[0063] Step 201: Add a reverse bounce condition for the first and second axles in the KC analysis project.

[0064] Before performing the KC analysis, it is necessary to determine the KC analysis project. Each KC analysis project here is related to the overall performance of the vehicle. In the embodiment of the present invention, a reverse bounce condition for the first and second axles is added on the basis of the conventional KC analysis project. Here, the first and second axles refer to the first axle and the second axle, corresponding to the two axles of the double-front-axle balanced suspension, that is, the first axle and the second axle. Since a new KC analysis project is added, corresponding KC performance indicators also need to be added. The list of the finally added KC analysis projects is shown in Table 2 below:

[0065] As can be seen from the above table, in the embodiment of the present invention, a balance swing arm bounce angle gradient change index and an axle load ratio index are added to the conventional flat bounce analysis performance indicators. Among them, the axle load index represents the axle load ratio of the first and second axles, specifically, the ratio of the axle load of the first axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by the modeling method of the double-front-axle balanced suspension in any of the above embodiments.

[0066] Step 202: Based on the reverse bounce condition of the first and second axles, perform KC analysis on the assembly model of the double-front-axle balanced suspension to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles.

[0067] Next, according to Table 2 above, based on the reverse bounce condition of the first and second axles, perform KC analysis on the assembly model of the double-front-axle balanced suspension. Perform analysis for each performance indicator involved in Table 2 and record the analysis results as the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles. When the assembly model is constructed, in the embodiment of the present invention, a new request is created on the assembly model through Adams software to measure the axle load ratio.

[0068] It should be noted that the reverse bounce condition of the first and second axles is further divided into two condition forms, namely, the first axle is on top and the second axle is at the bottom, and the first axle is at the bottom and the second axle is on top. Therefore, when performing the KC analysis, it is necessary to perform the KC analysis in Table 2 above under the two condition forms respectively to obtain two sets of KC performance indicators. When performing the KC analysis, perform reverse bounce simulation on the assembly model according to the reverse bounce condition of the first and second axles. In the Parallel Travel analysis, input 0 for the upward jump value of the first axle and -100 for the downward jump value, input -100 for the upward jump value of the second axle, and 0 for the downward jump value, that is, perform reverse bounce simulation. During the simulation process, the first axle gradually jumps upward, the second axle gradually jumps downward, and the drop between the two axles (the height of the first axle wheel center - the height of the second axle wheel center) gradually changes from -100 mm to +100 mm, and record the simulation results of the KC performance indicators during the simulation process.

[0069] In the embodiments of the present invention, when performing KC analysis, a new item of the reverse runout condition of the first and second axles is added, which can balance the characteristics of the suspension linkage, analyze the index changes during the reverse runout of the two axles, and is suitable for bumpy road conditions. In addition, by adding new indicators of the swing angle gradient change of the balance swing arm and the axle load ratio to improve the KC performance indicators, the movement of the double front axle balance suspension on the vehicle performance and structure can be comprehensively analyzed, the vehicle problems can be analyzed from the suspension level, and the direction of problem solving can be clarified, so as to eliminate vehicle problems by adjusting the double front axle balance suspension.

[0070] In some embodiments, after obtaining the KC performance indicators of the assembly model under the reverse runout condition of the first and second axles when performing the above step 202, the abnormal items of the assembly model are also determined according to the KC performance indicators. Here, under normal vehicle conditions, each KC performance indicator will correspondingly have a normal indicator, which represents the normal value when there are no problems with the vehicle.

[0071] An abnormal item is a KC analysis item in which the difference value between the KC performance indicator and the normal indicator is greater than a preset threshold. Here, for each KC performance indicator, the difference value from the normal indicator can be calculated, specifically by calculating the difference between the KC performance indicator and the normal indicator and then taking the absolute value. And a preset threshold is also set for each KC performance indicator, which is used as a standard for judging whether the KC performance indicator is abnormal. When the difference value between the KC performance indicator and the normal indicator is greater than the preset threshold, it indicates that the indicator has deviated from the standard and there is an abnormality.

[0072] Next, the problem points of the double front axle balance suspension corresponding to the actual vehicle are determined according to the abnormal items. Here, each KC performance indicator corresponds to the overall vehicle problem of the vehicle, because the abnormality of the KC performance indicator will inevitably lead to problems or failures when the vehicle is moving. Therefore, according to the above-identified abnormal items, the problem points of the double front axle balance suspension corresponding to the actual vehicle can be determined. Of course, each abnormal item may determine the corresponding problem points.

[0073] For example, when performing the reverse runout condition of the first and second axles, if the difference value between the gradient indicator of the runout toe gradient and the normal indicator is greater than the preset toe gradient threshold, it indicates that the runout toe gradient is an abnormal item, and the steering wheel is likely to shake on the actual vehicle. When the difference value between the gradient indicator of the longitudinal displacement gradient of the wheel runout and the normal indicator is greater than the preset longitudinal displacement gradient threshold, it indicates that the longitudinal displacement gradient of the wheel runout is an abnormal item, and the longitudinal stability during vehicle driving is poor.

[0074] After determining the problem points corresponding to the actual vehicle based on the abnormal items, the optimization of the double front axle balance suspension can be guided according to the problem points. Here, the hard point coordinates or structural forms of the double front axle balance suspension are adjusted according to the problem points to eliminate the problem points. For example, when the problem point is that the steering wheel of the actual vehicle is prone to shaking, the hard point coordinates or structural forms of the double front axle balance suspension can be adjusted accordingly to overcome the problem of steering wheel shaking. If the problem point is that the longitudinal stability of the vehicle during driving is poor, then correspondingly, the hard point coordinates or structural forms of the double front axle balance suspension can also be adjusted to overcome the problem of poor longitudinal stability.

[0075] In the embodiment of the present invention, according to the abnormal items in the KC performance indicators, the problem points of the actual vehicle are determined, and then the hard point coordinates or structural forms of the double front axle balance suspension are continuously designed and improved according to the problem points, forming an optimization closed loop. Through the closed loop, the influence of the movement of the double front axle balance suspension on the vehicle performance and structure can be comprehensively analyzed, the vehicle problems can be analyzed from the suspension level, and the direction of solving the problem points can be clarified, so as to overcome the possible vehicle problems by adjusting the double front axle balance suspension.

[0076] In some embodiments, in order to more clearly define the correlation and influence between the structural design of the double front axle balance suspension and the KC performance indicators, the embodiment of the present invention also provides a variable experiment.

[0077] Specifically, when performing KC analysis on the assembly model, the front end length of the balance swing arm, the included angle of the balance swing arm, the initial angle of the balance swing arm, and the installation height of the balance swing arm in the KC analysis items are used as the optimization design variables. Here, the balance swing arm is also Figure 2 the balance rod 23 in Figure 3 the first axle swing arm 33 in Figure 3 or the second axle swing arm 37 in

[0078] Correspondingly, the axle load ratio index and the toe gradient index in the KC performance indicators are used as the optimization response variables. Of course, in actual embodiments, the corresponding indicators can also be selected from the KC performance indicators in Table 2 above according to actual needs as the optimization response variables, which are not limited in the embodiment of the present invention.

[0078] Next, an optimization experiment is created based on the optimization design variables and the optimization response variables, and the fitting correlation between the optimization design variables and the optimization response variables is determined in the optimization experiment. The optimization experiment process here can be a consistent virtual experiment executed in the AdamsInsight module of Adams software, which is used to simulate the real experiment process. The optimization experiment can be fitted and realized by using an interactive model or a quadratic model, and the fitting correlation can be reflected in the form of a curve coordinate diagram. Exemplarily, as Figure 6 shown, Figure 6It is a schematic diagram of the change in the axle load ratio during reverse bounce provided by the present invention. The abscissa X-axis is the difference value from the height of the first axle wheel center to the height of the second axle wheel center, which can be determined according to the installation height of the balance swing arm. The ordinate Y-axis is the axle load ratio index. Through the curve graph, the fitting correlation relationship between the difference value from the height of the first axle wheel center to the height of the second axle wheel center and the axle load ratio index can be visualized.

[0079] Next, according to the fitting correlation relationship, a system simulation experiment is carried out to obtain a sensitivity file. The simulation experiment can also be executed in Adams software. Through the system simulation experiment, the true correlation relationship between each optimization design quantity and each optimization response quantity can be verified and recorded in the sensitivity file.

[0080] According to the sensitivity file, the true correlation relationship between the optimization design quantity and the optimization response quantity is determined. There are various fitting correlation relationships recorded in the sensitivity file, such as the true correlation relationships between the front length of the balance swing arm, the angle of the balance swing arm, the initial angle of the balance swing arm, and the installation height of the balance swing arm and the axle load ratio index respectively.

[0081] Finally, the double front axle balance suspension can be adjusted based on the true correlation relationship. Here, the sensitivity file can be read and analyzed in Adams software to determine the sensitivity of the optimization design quantity and the optimization response quantity, which characterizes the influence degree. Refer to Figure 7 Regarding the design parameters of the balance swing arm as factors, Figure 7 shows the sensitivity of these factors to the axle load ratio. By reading the sensitivity file, it is found that the angle of the balance swing arm has the greatest influence on the axle load ratio index, and as the angle of the balance swing arm increases, the root mean square value of the axle load ratio also increases. This also characterizes the true correlation relationship between the angle of the balance swing arm and the axle load ratio index. Therefore, the double front axle balance suspension is adjusted according to this true correlation relationship. For example, when designing the double front axle balance suspension, the included angle of the balance swing arm should not be designed too large.

[0082] In the embodiment of the present invention, during the KC analysis process, the sensitivity analysis of the balance swing arm structure to the key performance of the vehicle is realized. By analyzing and simulating to verify the influence of the balance swing arm structure on the vehicle performance, various true correlation relationships are recorded in the sensitivity file to quantify the influence degree of different parameters on the vehicle performance, which is used to optimize the balance swing arm and provide more accurate guidance for the double front axle balance suspension, further exerting the optimal performance of the vehicle.

[0083] The embodiment of the present invention also provides a modeling device for a double front axle balance suspension. The following describes the modeling device for a double front axle balance suspension provided by the present invention. The modeling device for a double front axle balance suspension described below can be correspondingly referred to the modeling method for a double front axle balance suspension described above.

[0084] As Figure 8As shown in the figure, the modeling device of the double front axle balance suspension provided by the present invention specifically includes: a first determination module 801, a construction module 802, a second determination module 803, and a modeling module 804. Among them, the first determination module 801 is used to determine the structural form of the double front axle balance suspension. The structural form includes a first connection type and a second connection type. The first connection type is a connection form according to the first axle hanger, balance bar, and second axle hanger. The second connection type is a connection form according to the first axle hanger, first axle swing arm, pull rod, second axle swing arm, and second axle hanger. The construction module 802 is used to construct the leaf spring model of the double front axle balance suspension. The second determination module 803 is used to determine the hard point coordinates in the double front axle balance suspension under the structural form. The modeling module 804 is used to establish the hard point coordinates in the leaf spring model, obtain the corresponding balance link model, and assemble the balance link model to obtain the assembly model of the double front axle balance suspension.

[0085] It should be noted that the beneficial effects of the modeling device of the double front axle balance suspension here correspond to those of the modeling method of the double front axle balance suspension in the above text. Therefore, the beneficial effects of the modeling device of the double front axle balance suspension will not be elaborated here.

[0086] The embodiment of the present invention also provides a KC analysis device for a double front axle balance suspension. The KC analysis device for the double front axle balance suspension provided by the present invention will be described below. The KC analysis device for the double front axle balance suspension described below can be correspondingly referred to the KC analysis method for the double front axle balance suspension described above.

[0087] As Figure 9 shown in the figure, the KC analysis device for the double front axle balance suspension provided by the present invention specifically includes: a new addition module 901 and an analysis module 902. Among them, the new addition module 901 is used to add a reverse bounce condition of the first and second axles in the KC analysis project. The analysis module 902 is used to perform KC analysis on the assembly model of the double front axle balance suspension based on the reverse bounce condition of the first and second axles to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles. Among them, the KC performance indicators include the gradient change index of the balance swing arm bounce angle and the axle load ratio index. The axle load ratio index is the ratio of the axle load of the first axle to the axle load of the second axle in the assembly model. The assembly model is obtained by using the modeling method of the double front axle balance suspension in any of the above embodiments.

[0088] It should be noted that the beneficial effects of the KC analysis device of the double front axle balance suspension here correspond to those of the KC analysis method of the double front axle balance suspension in the above text. Therefore, the beneficial effects of the KC analysis device of the double front axle balance suspension will not be elaborated here.

[0089] Figure 10An example of a schematic diagram of the physical structure of an electronic device is shown as follows Figure 10 As shown, the electronic device may include: a processor 910, a communications interface 920, a memory 930, and a communication bus 940. Among them, the processor 910, the communications interface 920, and the memory 930 communicate with each other through the communication bus 940. The processor 910 can call the logical instructions in the memory 930 to execute the modeling method of the double front axle balance suspension and the KC analysis method of the double front axle balance suspension. The modeling method of the double front axle balance suspension includes: determining the structural form of the double front axle balance suspension, where the structural form includes a first connection type and a second connection type. The first connection type is the form of connecting according to the first axle hanger, the balance bar, and the second axle hanger. The second connection type is the form of connecting according to the first axle hanger, the first axle swing arm, the tie rod, the second axle swing arm, and the second axle hanger; constructing the leaf spring model of the double front axle balance suspension; under the structural form, determining the hard point coordinates in the double front axle balance suspension; establishing the hard point coordinates in the leaf spring model to obtain the corresponding balance link model, and assembling the balance link model to obtain the assembly model of the double front axle balance suspension. The KC analysis method of the double front axle balance suspension includes: based on the reverse bounce condition of the first and second axles, performing KC analysis on the assembly model of the double front axle balance suspension to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles; where the KC performance indicators include the balance swing arm bounce angle gradient change indicator and the axle load ratio indicator. The axle load ratio indicator is the ratio of the axle load of the first axle to the axle load of the second axle in the assembly model. The assembly model is obtained by using the modeling method of the double front axle balance suspension in any of the above embodiments.

[0090] In addition, when the logical instructions in the above-mentioned memory 930 are implemented in the form of software functional units and sold or used as independent products, they 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 a part of this 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 enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0091] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the modeling method of the double front axle balance suspension and the KC analysis method of the double front axle balance suspension provided by the above-mentioned various methods. The modeling method of the double front axle balance suspension includes: determining the structural form of the double front axle balance suspension, where the structural form includes a first connection type and a second connection type. The first connection type is the form of connecting according to the first axle hanger, the balance bar, and the second axle hanger, and the second connection type is the form of connecting according to the first axle hanger, the first axle swing arm, the tie rod, the second axle swing arm, and the second axle hanger; constructing the leaf spring model of the double front axle balance suspension; under the structural form, determining the hard point coordinates in the double front axle balance suspension; establishing the hard point coordinates in the leaf spring model to obtain the corresponding balance link model, and assembling the balance link model to obtain the assembly model of the double front axle balance suspension. The KC analysis method of the double front axle balance suspension includes: based on the reverse bounce condition of the first and second axles, performing KC analysis on the assembly model of the double front axle balance suspension to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles; where the KC performance indicators include the balance swing arm bounce angle gradient change indicator and the axle load ratio indicator. The axle load ratio indicator is the ratio of the axle load of the first axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by using the modeling method of the double front axle balance suspension in any of the above embodiments.

[0092] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the modeling method of the dual-front-axle balanced suspension and the KC analysis method of the dual-front-axle balanced suspension provided by the above various methods. The modeling method of the dual-front-axle balanced suspension includes: determining the structural form of the dual-front-axle balanced suspension, where the structural form includes a first connection type and a second connection type. The first connection type is a form of connecting according to a first-axle hanger, a balance bar, and a second-axle hanger, and the second connection type is a form of connecting according to a first-axle hanger, a first-axle swing arm, a tie rod, a second-axle swing arm, and a second-axle hanger; constructing a leaf spring model of the dual-front-axle balanced suspension; under the structural form, determining the hard point coordinates in the dual-front-axle balanced suspension; establishing the hard point coordinates in the leaf spring model to obtain a corresponding balance link model, and assembling the balance link model to obtain an assembly model of the dual-front-axle balanced suspension. The KC analysis method of the dual-front-axle balanced suspension includes: based on the reverse bounce condition of the first and second axles, performing KC analysis on the assembly model of the dual-front-axle balanced suspension to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles; where the KC performance indicators include a balance swing arm bounce angle gradient change indicator and an axle load ratio indicator, and the axle load ratio indicator is the ratio of the axle load of the first axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by using the modeling method of the dual-front-axle balanced suspension in any of the above embodiments.

[0093] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0094] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modeling method for a double front axle balance suspension, characterized in that, Including: Determine the structural form of the double front axle balance suspension. The structural form includes a first connection type and a second connection type. The first connection type is a form of connecting the first axle hanger, the balance bar, and the second axle hanger. The second connection type is a form of connecting the first axle hanger, the first axle swing arm, the tie rod, the second axle swing arm, and the second axle hanger; Construct the leaf spring model of the double front axle balance suspension; Under the said structural form, determine the hard point coordinates in the double front axle balance suspension; Establish the hard point coordinates in the leaf spring model to obtain the corresponding balance link model, and assemble the balance link model to obtain the assembly model of the double front axle balance suspension.

2. The modeling method of the double front axle balance suspension according to claim 1, characterized in that, The determining the hard point coordinates in the double front axle balance suspension under the said structural form includes: Under the first connection type, determine the connection point coordinates of the first axle hanger and the balance bar, the mounting point coordinates of the balance bar on the vehicle frame, and the connection point coordinates of the balance bar and the second axle hanger as the hard point coordinates in the double front axle balance suspension; Under the second connection type, determine the connection point coordinates of the first axle hanger and the first axle swing arm, the first mounting point coordinates of the first axle swing arm on the vehicle frame, the connection point coordinates of the first axle swing arm and the tie rod, the connection point coordinates of the tie rod and the second axle swing arm, and the connection point coordinates of the second axle swing arm and the second axle hanger as the hard point coordinates in the double front axle balance suspension.

3. The modeling method of the double front axle balance suspension according to claim 1, characterized in that When the hard point coordinates are the hard point coordinates determined under the first connection type, the establishing the hard point coordinates in the leaf spring model to obtain the corresponding balance link model includes: In the leaf spring model, create a new component as the balance link at the mounting point coordinates of the balance bar on the vehicle frame, and create a new mounting part to connect the balance link to the vehicle frame; Establish a revolute pair at the mounting point coordinates to connect the balance link and the mounting part to obtain the corresponding balance link model.

4. The modeling method of the double front axle balance suspension according to claim 1, characterized in that When the hard point coordinates are the hard point coordinates determined under the second connection type, the establishing the hard point coordinates in the leaf spring model to obtain the corresponding balance link model includes: In the leaf spring model, establish a first axle swing arm component, a second axle swing arm component, and a tie rod component at the first mounting point coordinates of the first axle swing arm on the vehicle frame, the second mounting point coordinates of the second axle swing arm on the vehicle frame, and the midpoint coordinates between the first mounting point coordinates and the second mounting point coordinates respectively; Construct a first mounting part and a second mounting part at the first mounting point coordinates and the second mounting point coordinates respectively, and connect the first axle swing arm to the vehicle frame through the first mounting part, and connect the second axle swing arm to the vehicle frame through the second mounting part; Establish a kinematic pair at the first mounting point coordinates to connect the first mounting part and the first axle swing arm component, and establish a kinematic pair at the second mounting point coordinates to connect the second mounting part and the second axle swing arm component to obtain the corresponding balance link model.

5. A KC analysis method for a double front axle balance suspension, characterized in that, Including: Add a reverse bounce condition of the first and second axles in the KC analysis item; Based on the reverse bounce condition of the first and second axles, conduct a KC analysis on the assembly model of the double front axle balance suspension to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles. Among them, the KC performance indicators include the balance swing arm bounce angle gradient change indicator and the axle load ratio indicator. The axle load ratio indicator is the ratio of the axle load of one axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by using the modeling method of the double front axle balance suspension according to any one of claims 1-4 above.

6. The KC analysis method of the double front axle balance suspension according to claim 5, characterized in that The method further includes: Determining the abnormal items of the assembly model according to the KC performance indicators, where the abnormal items are the KC performance indicators whose difference value between the KC performance indicators and the normal indicators is greater than a preset threshold; Determining the problem points of the double front axle balance suspension corresponding to the actual vehicle according to the abnormal items; Adjusting the hard point coordinates or the structural form of the double front axle balance suspension according to the problem points to eliminate the problem points.

7. The KC analysis method of the double front axle balance suspension according to claim 6, characterized in that, The method further includes: Taking the front end length of the balance swing arm, the balance swing arm angle, the initial angle of the balance swing arm, and the installation height of the balance swing arm in the KC analysis items as the optimization design variables, and taking the axle load ratio indicator and the bounce front wheel speed gradient indicator in the KC performance indicators as the optimization response variables; Creating an optimization experiment according to the optimization design variables and the optimization response variables, and determining the fitting correlation relationship between the optimization design variables and the optimization response variables in the optimization experiment; Performing a system simulation experiment according to the fitting correlation relationship to obtain a sensitivity file; Determining the true correlation relationship between the optimization design variables and the optimization response variables according to the sensitivity file; Adjusting the double front axle balance suspension based on the true correlation relationship.

8. A modeling device for a double front axle balance suspension, characterized in that, Including: A first determination module for determining the structural form of the double front axle balance suspension. The structural form includes a first connection type and a second connection type. The first connection type is a connection form according to the first axle ear, the balance rod, and the second axle ear, and the second connection type is a connection form according to the first axle ear, the first axle swing arm, the tie rod, the second axle swing arm, and the second axle ear; A construction module for constructing the leaf spring model of the double front axle balance suspension; A second determination module for determining the hard point coordinates in the double front axle balance suspension under the structural form; A modeling module for establishing the hard point coordinates in the leaf spring model to obtain a corresponding balance link model, and assembling the balance link model to obtain the assembly model of the double front axle balance suspension.

9. A KC analysis device for a double front axle balance suspension, characterized in that, Including: A new addition module for adding a reverse bounce condition of the first and second axles to the KC analysis items; An analysis module for performing KC analysis on the assembly model of the double front axle balance suspension based on the reverse bounce condition of the first and second axles to obtain the KC performance indicators of the assembly model under the reverse bounce condition of the first and second axles; Among them, the KC performance indicators include the balance swing arm bounce angle gradient change indicator and the axle load ratio indicator. The axle load ratio indicator is the ratio of the axle load of one axle to the axle load of the second axle in the assembly model, and the assembly model is obtained by using the modeling method of the double front axle balance suspension according to any one of claims 1-4 above.

10. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the modeling method of the double front axle balance suspension according to any one of claims 1 to 4 and the KC analysis method of the double front axle balance suspension according to any one of claims 5 to 7.

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