A tire envelope generation method and system

Abstract

The present invention provides a tire envelope generation method, including forming a simulation motion model according to the suspension motion mode; obtaining a tire digital model and a vehicle body digital model, and establishing a connection relationship between the tire digital model, the vehicle body digital model and the suspension; obtaining robust parameters and clearance parameters, and driving the simulation motion model to obtain simulation results; generating a tire envelope according to the simulation results; judging whether the target wheel envelope and the vehicle body interfere; if so, issuing a request to re-obtain the robust parameters and clearance parameters, and after re-obtaining the robust parameters and clearance parameters, driving the simulation motion model; if not, issuing a prompt message, and the prompt message is used to prompt that the design is correct. The present invention solves the problem of insufficient tire envelope accuracy and interference friction between the actual mounted tire and the wheel edge parts in the traditional technology.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile design, and in particular to a tire envelope generation method and system. Background Art

[0002] With the development of society, cars have become one of the indispensable means of transportation in people's lives, and the wheels in the car play a vital role in the driving of the car.

[0003] Among them, the car wheel is connected to the suspension at one end and moves in contact with the ground at the other end. It is one of the components with the largest movement range and the most complex working conditions in the entire vehicle. It is crucial to the operating status of the entire vehicle. In addition, the soft connection of rubber sleeves and rubber parts between the moving parts of the suspension makes the tire movement complicated.

[0004] In traditional vehicle development and design, a mechanical kinematic suspension model is used to simulate extreme wheel bounce to obtain the wheel motion trajectory to create the tire envelope. However, since the deformation of the rubber parts between the articulated pairs, the tolerance of the wheel alignment parameters, the wheel center tolerance and the design and manufacturing deviation of the wheel rim flexible parts are not considered, the tire envelope accuracy is insufficient and interference friction occurs between the actual installed tire and the wheel rim parts. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a tire envelope generation method and system to solve the technical problems of insufficient precision of traditional tire envelopes and interference friction between actual mounted tires and wheel rims.

[0006] A first aspect of an embodiment of the present invention provides a tire envelope generation method, comprising:

[0007] Forming a simulation motion model according to the suspension motion mode, the simulation motion model including a working condition file, the working condition file including a definition relationship of the corresponding influence of the robust parameter and the clearance parameter on the suspension;

[0008] Acquire a tire digital model and a body digital model, and establish a connection relationship between the tire digital model, the body digital model and the suspension;

[0009] Acquire the robust parameters and the clearance parameters, and drive the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of the target wheel center and a motion trajectory point set of the target tire along the suspension;

[0010] According to the target tire motion trajectory point set along the suspension, the digital model of the driving wheel assembly generates a tire envelope;

[0011] Determining whether the target wheel envelope interferes with the vehicle body;

[0012] If so, a request is issued to re-acquire the robust parameters and the gap parameters, and the steps of acquiring the robust parameters and the gap parameters and driving the simulation motion model to obtain simulation results are executed;

[0013] If not, a prompt message is issued, wherein the prompt message is used to prompt that the design is correct.

[0014] In addition, the tire envelope generation method according to the above embodiment of the present invention may also have the following additional technical features:

[0015] Preferably, the robust parameters at least include independent suspension rubber bushing stress deformation parameters, lateral toe-in tolerance parameters, wheel center position tolerance parameters, toe-in tolerance parameters, camber angle tolerance parameters, and steering rack travel tolerance parameters.

[0016] Preferably, the clearance parameters at least include sharp protrusion clearance parameters, wearing part clearance parameters and powertrain part clearance parameters.

[0017] Preferably, the step of obtaining the robust parameter and the gap parameter specifically includes:

[0018] The simulated motion model stores standard preset parameter values ​​of the robust parameters and the gap parameters. When it is necessary to execute the step of obtaining the robust parameters and the gap parameters, the preset parameter values ​​are extracted.

[0019] Preferably, before the step of reacquiring the robust parameter and the gap parameter, the step further includes:

[0020] Prompt corrections are given to the robust parameters and the gap parameters, and the correction prompts are used to guide designers to modify reasonable values ​​of the robust parameters and the gap parameters.

[0021] Preferably, the step of determining whether the target wheel envelope interferes with the vehicle body specifically includes:

[0022] It is determined whether there is a trajectory point in the trajectory point set of the target tire moving along the suspension that falls within the vehicle body digital model area.

[0023] Preferably, the step of reacquiring the robust parameter and the gap parameter specifically includes:

[0024] According to the correction prompt, the designer can customize the robust parameters and the gap parameters and input them into the simulation motion model.

[0025] Preferably, the step of generating a tire envelope by driving a wheel assembly digital model according to the target tire motion trajectory point set along the suspension specifically comprises:

[0026] A plurality of tire envelope surfaces are generated according to the target tire motion trajectory point set along the suspension, and the tire envelope is obtained by summing and accumulating the plurality of tire envelope surfaces.

[0027] A first aspect of an embodiment of the present invention provides a tire envelope generation system, the system comprising:

[0028] A forming unit, used for forming a simulation motion model according to the suspension motion mode, wherein the simulation motion model includes a working condition file, and the working condition file includes a definition relationship of the corresponding influence of the robust parameter and the clearance parameter on the suspension;

[0029] An acquisition unit, used for acquiring a tire digital model and a body digital model, and establishing a connection relationship between the tire digital model, the body digital model and the suspension;

[0030] A simulation unit, used to obtain the robust parameters and the clearance parameters, and drive the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of a target wheel center and a motion trajectory point set of a target tire along with the suspension;

[0031] An envelope generating unit, used for driving a wheel assembly digital model to generate a tire envelope according to a point set of a target tire motion trajectory along with the suspension;

[0032] A judging unit, used for judging whether the target wheel envelope interferes with the vehicle body;

[0033] a request unit, configured to issue a request for re-obtaining the robust parameters and the gap parameters when it is determined that the target wheel envelope interferes with the vehicle body, and execute the steps of obtaining the robust parameters and the gap parameters, and driving the simulation motion model to obtain simulation results;

[0034] The prompt unit is used to issue a prompt message when it is determined that there is no interference between the target wheel envelope and the vehicle body, wherein the prompt message is used to prompt that the design is correct.

[0035] Preferably, the envelope generating unit is specifically used for:

[0036] A plurality of tire envelope surfaces are generated according to the target tire motion trajectory point set along the suspension, and the tire envelope is obtained by summing and accumulating the plurality of tire envelope surfaces.

[0037] Compared with the existing technology: a simulation motion model is formed by a working condition file that includes a definition relationship between robust parameters and clearance parameters that have corresponding effects on the suspension, and then a connected rear-drive simulation motion model is established by acquiring the tire digital model and the body digital model. Since the relevant tolerances are taken into account, the tire envelope generated by the model is more accurate and certain risks can be avoided. By judging whether there is interference between the target wheel envelope and the body, designers can intuitively understand the interference of tire movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a flow chart of a tire envelope generation method according to a first embodiment of the present invention;

[0039] Figure 2 is a flow chart of a tire envelope generation method according to a second embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of tire structure;

[0041] Figure 4 is a schematic diagram of toe-in tolerance;

[0042] Figure 5 is a schematic diagram of camber angle tolerance;

[0043] Figure 6 is a structural block diagram of a tire envelope generation system provided by a third embodiment of the present invention;

[0044] The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0045] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0048] Embodiment 1

[0049] See also Figure 1 , Figure 1 A flowchart of a tire envelope generation method provided by a first embodiment of the present invention is shown. The method specifically includes steps S01 to S07.

[0050] Step S01, forming a simulation motion model according to the suspension motion mode, wherein the simulation motion model includes a working condition file, and the working condition file includes a definition relationship of the corresponding influence of the robust parameters and the clearance parameters on the suspension.

[0051] It should be noted that the traditional design and analysis software is ADMAS / Car, but it has not yet been popularized due to its high professional level. In this embodiment, a creation method based on a CAD model is proposed. CAD software is widely used in the mechanical field and is relatively easy to use.

[0052] In addition, in general, it is necessary to simulate the extreme motion of the suspension model. Usually, the suspension is connected to the center of the wheel, so discontinuous wheel center motion trajectory points can be obtained. At this time, the wheel center motion trajectory points should be in a three-dimensional state. Through the three points on the outermost side, the tire movement direction can be preliminarily confirmed, and a spatial position associated with the entire vehicle can be established. In this embodiment, the movement mode and movement model of the suspension are known to technical personnel in this field, but the working condition file needs to be newly created, which includes the definition relationship between the robust parameters and the gap parameters that have a corresponding impact on the suspension. Through the effect of the robust parameters and the gap parameters on the tire envelope, the quality of engineering development can be ensured and potential risks can be avoided.

[0053] Step S02, obtaining a tire digital model and a vehicle body digital model, and establishing a connection relationship between the tire digital model, the vehicle body digital model and the suspension.

[0054] Among them, the tire digital model and the body digital model are models of the tire and the body, including the position relationship and size. Then, a connection relationship is established between the tire, the body and the suspension to form a three-dimensional model of the part or the whole vehicle. It can be understood that through the three-dimensional model, the designer can obtain any size and corresponding relationship in the model.

[0055] Step S03, obtaining the robust parameters and the clearance parameters, and driving the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of the target wheel center and a motion trajectory point set of the target tire along the suspension.

[0056] Among them, the simulation motion model stores the preset parameter values ​​of the standard robust parameters and the gap parameters. When it is necessary to execute the step of obtaining the robust parameters and the gap parameters, the preset parameter values ​​are extracted. It should be noted that the preset parameter values ​​are empirical values, that is, the values ​​obtained by technical personnel in this field through trial and error. The purpose of using the preset parameter values ​​is to avoid technical personnel with no relevant experience or less relevant experience from deviating from reality during simulation due to lack of understanding of the product situation.

[0057] Specifically, after obtaining the robust parameters and the clearance parameters, the suspension in the simulation motion model is driven to move under extreme conditions. Since the wheels are connected to the suspension, the wheels move driven by the suspension, and a number of discontinuous target wheel center motion trajectory points and tire motion trajectory points can be obtained, forming two point sets respectively. It can be understood that the two point sets do not intersect.

[0058] Step S04, driving the wheel assembly digital model to generate a tire envelope according to the target tire motion trajectory point set along the suspension.

[0059] Since there are a large number of target tire motion trajectory points, multiple tire envelope surfaces can be generated through the motion trajectory points, and then the tire envelope is obtained by summing up the multiple tire envelope surfaces. The tire envelope is the area range that the tire can move to.

[0060] Step S05, determining whether the target wheel envelope interferes with the vehicle body.

[0061] Specifically, when it is determined that there is a certain trajectory point in the trajectory point concentration of the target tire along the suspension movement that falls within the range of the vehicle body digital model area, it is considered that there is interference between the target wheel envelope and the vehicle body, that is, there is a risk of collision between the wheel and the vehicle body during movement, and S06 is executed; when it is determined that there is no interference between the target wheel envelope and the vehicle body, S07 is executed.

[0062] Step S06, issuing a request to re-acquire the robust parameters and the gap parameters, and executing the steps of acquiring the robust parameters and the gap parameters, and driving the simulation motion model to obtain simulation results.

[0063] Due to design problems, the tire interferes with the vehicle. At this time, a request to re-acquire the robust parameters and the gap parameters will be issued, that is, the designer is required to change the appropriate parameters again to meet the design requirements. It can be understood that after obtaining the modified parameters, the simulation motion model will be driven again for further simulation. If it is still unqualified, the step will be looped until the acquired parameters can make the target wheel envelope not interfere with the vehicle body.

[0064] Step S07: issuing a prompt message, wherein the prompt message is used to prompt that the design is correct.

[0065] It is understandable that when a prompt message is issued, it means that the simulation is successful, that is, the tire will not interfere with the vehicle body during movement, and a tire envelope diagram is generated. At the same time, designers can also further modify parameters and optimize according to the generated tire envelope diagram, for example, making the tire envelope smaller and the entire vehicle more beautiful.

[0066] In summary, the tire envelope generation method in the above-mentioned embodiment of the present invention forms a simulation motion model through a working condition file including a definition relationship of the corresponding influence of robust parameters and clearance parameters on the suspension, and then obtains the tire digital model and the vehicle body digital model to establish a connected rear-drive simulation motion model. Since the relevant tolerances are taken into account, the tire envelope generated by the model is more accurate and certain risks can be avoided. Then, by judging whether there is interference between the target wheel envelope and the vehicle body, the designer can intuitively understand the interference of the tire movement.

[0067] Embodiment 2

[0068] See also Figure 2 , Figure 2 A flowchart of a tire envelope generation method provided by a second embodiment of the present invention is shown. The method specifically includes steps S10 to S16.

[0069] Step S10, forming a simulation motion model according to the motion mode of the suspension, wherein the simulation motion model includes a working condition file, and the working condition file includes a definition relationship of the corresponding influence of the robust parameters and the clearance parameters on the suspension.

[0070] Step S11, obtaining a tire digital model and a vehicle body digital model, and establishing a connection relationship between the tire digital model, the vehicle body digital model and the suspension.

[0071] Among them, the tire digital model and the body digital model should match the physical tire and body that need to be simulated.

[0072] Step S12, acquiring the robust parameters and the clearance parameters, and driving the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of the target wheel center and a motion trajectory point set of the target tire along the suspension.

[0073] In this embodiment, the robust parameters include independent suspension rubber bushing force deformation parameters, lateral toe tolerance parameters, wheel center position tolerance parameters, toe tolerance parameters, camber angle tolerance parameters, steering gear rack travel tolerance parameters, and the clearance parameters include sharp protrusion clearance parameters, wearing parts clearance parameters and powertrain parts clearance parameters. It can be understood that each parameter will have an impact on the simulation results, that is, the motion trajectory point set of the target wheel center and the target tire change with the suspension motion trajectory point set.

[0074] Among them, when developing a new model, the robust parameters of the suspension kinematic characteristics must be calculated based on the flexible bushing stiffness of the determined model, that is, the stress deformation parameters of the independent suspension rubber bushing, and it is necessary to ensure that the tire model can be suitable for all deformed vehicles. The specific calculation scheme is shown in Tables 1 and 2 below:

[0075]

[0076]

[0077]

[0078] Specifically, different independent suspension rubber bushing stress and deformation parameters need to be obtained according to different vehicle models.

[0079] Lateral toe-in tolerance parameter, the parameter calculation formula is:

[0080] Lateral force toe tolerance = L1sin(Δθ 前束侧向特性 )-W1[1-cos(Δθ 前束侧向特性 )]

[0081] Where, the lateral force toe-in tolerance is the spatial distance (mm) that the tire envelope increases / decreases due to toe-in change, θ 前束侧向特性 is the toe change angle during lateral acceleration (°), and the preset parameter value is Δθ 前束侧向特性 = 0°, L1 is the radial distance from the wheel center to P1 (the lateral projection point of the intersection of the tread and the sidewall) (mm), W1 is the vertical distance from P1 to the tire centerline (mm), such as Figure 3 shown.

[0082] Wheel center position tolerance parameters, wheel center position tolerance calculation formula is as follows:

[0083]

[0084]

[0085]

[0086] Among them, T 轮心Xis the dimensional tolerance of the wheel center in the X-axis direction, and the same applies to the Y and Z axes. 零件1x is the dimensional tolerance of part 1 in the X-axis direction, and so on for the Y and Z axes. It should be noted that this method is based on the RSS summation method. When calculating, only the influence of the main parts of the suspension system (such as subframe, swing arm and steering knuckle) on the wheel center position tolerance needs to be considered, and the positive and negative values ​​of the dimensional tolerance values ​​should be noted. The preset parameter values ​​are X±2.5mm; Y±2.5mm; Z±1.5mm.

[0087] Tolerance parameters of the body and fixed parts. When using the tire envelope to analyze the gap, it is necessary to consider the impact of the dimensional tolerances of the body and parts fixed to the body on the gap analysis, mainly referring to the parts around the tire. This method is based on the RSS summation method.

[0088] Toe-in tolerance parameter, toe-in tolerance formula is expressed as:

[0089] Toe tolerance = [L1sin(θ 最大 +Δθ 前束 )+W1cos(θ 最大 +Δθ 前束 )]-(L1sinθ 最大 +W1cosθ 最大 )

[0090] Toe tolerance is the spatial distance (mm) by which the tire envelope increases / decreases due to toe tolerance, θ 最大 is the steering limit travel of the outer steering wheel (°), and the preset parameter steering wheel θ 最大 is 32°, non-steering wheel θ 最大 is 0, where Δθ 前束 represents the toe angle tolerance (°), L1 represents the radial distance from the wheel center to P1 (mm), and W1 represents the vertical distance from P1 to the tire centerline (mm). Figure 4 As shown, in addition, the toe tolerance mainly affects the gap in the Y-axis direction of the tire envelope, and the preset parameter Δθ 前束 The angle of the rear suspension is 0.2° and the integral axle rear suspension is set to 0°.

[0091] Camber angle tolerance parameter, the formula is:

[0092] Camber angle tolerance = L2sin(Δθ 外倾角 )-W2[1-cos(Δθ 外倾角 )]

[0093] The camber tolerance is the distance in mm that the tire envelope increases / decreases due to the camber tolerance. Figure 5 As shown, Δθ 外倾角Indicates the camber angle tolerance (°), L2 indicates the radial distance from the wheel center to the widest point P2 of the tire (mm), usually L2 = rim radius + tire section width * 50%, W2 indicates half of the maximum tire width (mm), and the preset parameter Δθ 外倾角 The angle of the rear suspension is 0.75° and the integral axle rear suspension is set to 0°.

[0094] Steering gear rack travel tolerance parameter. When the steering gear rack travel tolerance is ±1mm, the nominal steering gear rack travel is used to establish the envelope. If the tolerance exceeds ±1mm, the formula for the steering gear rack travel used to establish the envelope is:

[0095] Steering rack travel = nominal travel + actual tolerance - 1

[0096] Specifically, when the nominal travel of the steering gear rack is 70mm±1mm, the nominal travel of 70mm is used to create the envelope; when the nominal travel of the steering gear rack is 72mm±3mm, the steering gear rack travel used when establishing the envelope = 72+3-1 = 74mm.

[0097] The sharp protrusion clearance parameter takes into account the vehicle manufacturing consistency error. The clearance between the wheel and any sharp protrusion or sharp edge / sharp angle is increased by 3mm based on the tire envelope clearance.

[0098] The clearance parameters of wearing parts. Most wearing parts are flexible parts, such as brake hoses, fuel pipes, and wiring harnesses. The spatial position changes of these parts are greater than the tolerance of body parts. In order to cope with this situation, an additional 10mm clearance is required on the basis of the tire envelope and chain envelope clearance requirements. If the actual position tolerance of the wearing parts can be determined, the additional clearance is increased or decreased as needed. Generally, the actual position tolerance of the wearing parts plus 3mm.

[0099] Powertrain parts clearance parameters: In order to cope with engine vibration, an additional 10mm clearance is added to the tire envelope and chain envelope clearance of parts fixed to the powertrain. If the dynamic position of the powertrain parts can be determined, the additional clearance can be increased or decreased according to the situation, but it is necessary to reserve an additional 3mm clearance for the powertrain parts in the worst case.

[0100] Step S13, driving the wheel assembly digital model to generate a tire envelope according to the target tire motion trajectory point set along the suspension.

[0101] Step S14, determining whether the target wheel envelope interferes with the vehicle body.

[0102] When it is determined that the target wheel envelope interferes with the vehicle body, S15 is executed; when it is determined that the target wheel envelope does not interfere with the vehicle body, S16 is executed.

[0103] Step S15, issuing a request to re-acquire the robust parameters and the gap parameters, and providing correction prompts for the robust parameters and the gap parameters, wherein the correction prompts are used to guide the designer to modify reasonable values ​​of the robust parameters and the gap parameters.

[0104] Specifically, when interference occurs between the target wheel envelope and the vehicle body, correction prompts will be given in sequence according to the weights of the parameters, and a suitable range will be recommended. Based on the correction prompts, the designer can customize the robust parameters and the gap parameters and input them into the simulation motion model. After the parameters are input, step S12 is executed.

[0105] Step S16: issuing a prompt message, wherein the prompt message is used to prompt that the design is correct.

[0106] Embodiment 3

[0107] See also Figure 6 , Figure 6 200 is a structural block diagram of a tire envelope generation system provided by a third embodiment of the present invention, the system comprising:

[0108] A forming unit 20, configured to form a simulation motion model according to the motion mode of the suspension, wherein the simulation motion model includes a working condition file, and the working condition file includes a definition relationship of a robust parameter and a clearance parameter on a corresponding effect of the suspension;

[0109] An acquisition unit 21 is used to acquire a tire digital model and a body digital model, and establish a connection relationship between the tire digital model, the body digital model and the suspension;

[0110] A simulation unit 22, used to obtain the robust parameters and the clearance parameters, and drive the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of the target wheel center and a motion trajectory point set of the target tire along the suspension;

[0111] An envelope generating unit 23 is used to generate a tire envelope by driving a wheel assembly digital model according to a point set of the target tire motion trajectory along the suspension;

[0112] A judging unit 24, used to judge whether the target wheel envelope interferes with the vehicle body;

[0113] A request unit 25, configured to issue a request to re-acquire the robust parameters and the gap parameters when it is determined that the target wheel envelope interferes with the vehicle body, and execute the steps of acquiring the robust parameters and the gap parameters, and driving the simulation motion model to obtain simulation results;

[0114] The prompt unit 26 is used to issue a prompt message when it is determined that there is no interference between the target wheel envelope and the vehicle body, wherein the prompt message is used to indicate that the design is correct.

[0115] Furthermore, the envelope generating unit is specifically used for:

[0116] A plurality of tire envelope surfaces are generated according to the target tire motion trajectory point set along the suspension, and the tire envelope is obtained by summing and accumulating the plurality of tire envelope surfaces.

[0117] In summary, the tire envelope generation method in the above-mentioned embodiment of the present invention forms a simulation motion model through a working condition file including a definition relationship of the corresponding influence of robust parameters and clearance parameters on the suspension, and then obtains the tire digital model and the vehicle body digital model to establish a connected rear-drive simulation motion model. Since the relevant tolerances are taken into account, the tire envelope generated by the model is more accurate and certain risks can be avoided. Then, by judging whether there is interference between the target wheel envelope and the vehicle body, the designer can intuitively understand the interference of the tire movement.

[0118] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0119] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A tire envelope generation method, characterized in that: The method comprises: Forming a simulation motion model according to the suspension motion mode, the simulation motion model including a working condition file, the working condition file including a definition relationship of the corresponding influence of the robust parameter and the clearance parameter on the suspension; Acquire a tire digital model and a body digital model, and establish a connection relationship between the tire digital model, the body digital model and the suspension; Acquire the robust parameters and the clearance parameters, and drive the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of the target wheel center and a motion trajectory point set of the target tire along the suspension; According to the target tire motion trajectory point set along the suspension, the digital model of the driving wheel assembly generates a tire envelope; Determining whether the target wheel envelope interferes with the vehicle body; If so, a request is issued to re-acquire the robust parameters and the gap parameters, and the steps of acquiring the robust parameters and the gap parameters and driving the simulation motion model to obtain simulation results are executed; If not, a prompt message is issued, wherein the prompt message is used to prompt that the design is correct.

2. The tire envelope generation method according to claim 1, characterized in that: The robust parameters at least include independent suspension rubber bushing stress deformation parameters, lateral toe tolerance parameters, wheel center position tolerance parameters, toe tolerance parameters, camber angle tolerance parameters, and steering rack travel tolerance parameters.

3. The tire envelope generation method according to claim 1, characterized in that: The clearance parameters at least include sharp protrusion clearance parameters, wearing part clearance parameters and powertrain part clearance parameters.

4. The tire envelope generation method according to claim 1, characterized in that: The step of obtaining the robust parameter and the gap parameter specifically includes: The simulated motion model stores standard preset parameter values ​​of the robust parameters and the gap parameters. When it is necessary to execute the step of obtaining the robust parameters and the gap parameters, the preset parameter values ​​are extracted.

5. The tire envelope generation method according to claim 1, characterized in that: Before the step of reacquiring the robust parameter and the gap parameter, the following steps are also included: Prompt corrections are given to the robust parameters and the gap parameters, and the correction prompts are used to guide designers to modify reasonable values ​​of the robust parameters and the gap parameters.

6. The tire envelope generation method according to claim 1, characterized in that: The step of determining whether the target wheel envelope interferes with the vehicle body specifically includes: It is determined whether there is a trajectory point in the trajectory point set of the target tire moving along the suspension that falls within the vehicle body digital model area.

7. The tire envelope generation method according to claim 5, characterized in that: The step of reacquiring the robust parameter and the gap parameter specifically includes: According to the correction prompt, the designer can customize the robust parameters and the gap parameters and input them into the simulation motion model.

8. The tire envelope generation method according to claim 1, characterized in that: The step of generating a tire envelope by driving a wheel assembly digital model according to the target tire motion trajectory point set along the suspension specifically comprises: A plurality of tire envelope surfaces are generated according to the target tire motion trajectory point set along the suspension, and the tire envelope is obtained by summing and accumulating the plurality of tire envelope surfaces.

9. A tire envelope generation system, characterized in that: Used to implement the tire envelope generation method according to any one of claims 1 to 8, the system comprises: A forming unit, used for forming a simulation motion model according to the suspension motion mode, wherein the simulation motion model includes a working condition file, and the working condition file includes a definition relationship of the corresponding influence of the robust parameter and the clearance parameter on the suspension; An acquisition unit, used for acquiring a tire digital model and a body digital model, and establishing a connection relationship between the tire digital model, the body digital model and the suspension; A simulation unit, used to obtain the robust parameters and the clearance parameters, and drive the simulation motion model to obtain simulation results, wherein the simulation results include a motion trajectory point set of a target wheel center and a motion trajectory point set of a target tire along with the suspension; An envelope generating unit, used for driving a wheel assembly digital model to generate a tire envelope according to a point set of a target tire motion trajectory along with the suspension; A judging unit, used for judging whether the target wheel envelope interferes with the vehicle body; a request unit, configured to issue a request for re-obtaining the robust parameters and the gap parameters when it is determined that the target wheel envelope interferes with the vehicle body, and execute the steps of obtaining the robust parameters and the gap parameters, and driving the simulation motion model to obtain simulation results; The prompt unit is used to issue a prompt message when it is determined that there is no interference between the target wheel envelope and the vehicle body, wherein the prompt message is used to prompt that the design is correct.

10. The tire envelope generation system according to claim 9, characterized in that: The envelope generating unit is specifically used for: A plurality of tire envelope surfaces are generated according to the target tire motion trajectory point set along the suspension, and the tire envelope is obtained by summing and accumulating the plurality of tire envelope surfaces.

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