CN-116738570-B - Rear suspension parameter adjustment method, system, equipment and medium based on simulation

CN116738570BCN 116738570 BCN116738570 BCN 116738570BCN-116738570-B

Abstract

The application provides a method, a system, equipment and a medium for adjusting rear suspension parameters based on simulation, which comprise the steps of obtaining target parts related to each rear suspension parameter, constructing an assembly structure tree based on connection points of the target parts, wherein the assembly structure tree is used for representing the composition and assembly sequence of different target parts, determining assembly fitting points of each part and corresponding target parts according to the assembly structure tree, constructing a tolerance analysis model according to the assembly fitting points, and performing assembly iteration on each assembly fitting point based on the tolerance analysis model, so that assembly tolerance of each assembly fitting point meets preset tolerance constraint, obtaining a target assembly scheme and a position adjustment range of the target part based on the corresponding connection points, and performing physical assembly based on the target assembly scheme and the position adjustment range. The application can effectively improve the adjustment precision and efficiency of the rear suspension parameters.

Inventors

XIAO MEI
CHENG XUEFENG
LEI YUANYUAN

Assignees

深蓝汽车科技有限公司

Dates

Publication Date: 20260508
Application Date: 20230609

Claims (12)

1. The method for adjusting the rear suspension parameters based on simulation is characterized by comprising the following steps of: acquiring target parts associated with each rear suspension parameter to construct an assembly structure tree based on connection points of the target parts, wherein the assembly structure tree is used for representing the composition and assembly sequence of different target parts; Determining an assembly fitting point of each part and a corresponding target part according to the assembly structure tree; Constructing a tolerance analysis model according to the fitting points, performing fitting iteration on the fitting points based on the tolerance analysis model, enabling the fitting tolerance of each fitting point to meet preset tolerance constraint, obtaining a target fitting scheme and a position adjustment range of the target part based on the corresponding connection point, and performing physical fitting based on the target fitting scheme and the position adjustment range; performing assembly iteration on each assembly fitting point based on the tolerance analysis model, including: And according to the initial assembly of the assembly fitting point, calculating whether the position of each part in the current assembly state meets the tolerance and the assembly data distribution form, if not, adjusting the assembly angle of the corresponding part according to a preset step length until the corresponding tolerance and the assembly data distribution form are met, and obtaining the target assembly scheme, wherein the target assembly scheme comprises the position adjustment range of the target part in the process of meeting the tolerance and the assembly data distribution form.
2. The simulation-based suspension parameter adjustment method according to claim 1, further comprising, before acquiring the target component associated with each suspension parameter: The method comprises the steps of obtaining directional displacement of connection points of parts in a preset mechanical motion model, wherein the mechanical motion model is obtained by performing simulation building according to a chassis suspension structure; And determining the parts associated with each rear suspension parameter as the target parts according to the change quantity of the corresponding rear suspension parameter under the action of the directional displacement.
3. The simulation-based rear suspension parameter adjustment method according to claim 2, wherein the target components in the mechanical motion model comprise a vehicle body, a rear subframe, an upper control arm, a lower control arm, a toe-in adjusting lever, an camber adjusting lever, a rear horn, a damper spring, a damper and a tire; the tire and the rear claw are connected to form an integrated structure; the rear claw is respectively in ball joint with the upper control arm, the lower control arm, the toe-in adjusting rod and the camber adjusting rod through a plurality of connecting points on the inner side of the rear claw; Establishing connection between the lower control arm and the rear auxiliary frame through a preset connection point between the lower control arm and the rear auxiliary frame; establishing connection between the rear auxiliary frame and the vehicle body through a preset connection point between the rear auxiliary frame and the vehicle body; the damping spring and the damper are arranged between the rear auxiliary frame and the vehicle body.
4. The method for adjusting rear suspension parameters based on simulation of claim 2, wherein the rear suspension parameters include a front toe angle of a rear wheel and a camber angle of the rear wheel, and determining components associated with each rear suspension parameter according to the variation of the corresponding rear suspension parameter under the action of the directional displacement, comprises: Loading a plurality of directional displacement amounts in preset directions on connection points of all parts in the mechanical motion model; Recording the change amounts of the toe-in angle of the rear wheel and the camber angle of the rear wheel when the connection points of the parts reach the corresponding directional displacement amounts; and taking the parts corresponding to the connecting points when the variation exceeds a preset threshold value as the parts related to the toe-in angle of the rear wheel or the camber angle of the rear wheel.
5. A simulation-based rear suspension parameter adjustment method according to claim 3, wherein constructing an assembly structure tree based on the connection points of the target parts comprises: Acquiring an assembly flow of each part in the mechanical motion model; The target part is used as a father node, and the child node associated with the father node is determined according to the assembly flow; and obtaining the assembly structure tree according to the association relation between the father node and the child node.
6. The simulation-based rear suspension parameter adjustment method of claim 5, wherein determining an assembly fitting point of each component to a corresponding target component according to the assembly structure tree comprises: taking connection points of target parts in the assembly structure tree as constraint points, and determining contact points of each part and corresponding target parts based on the constraint points; And determining the constraint direction of the contact point according to the variation of the rear suspension parameter so as to construct an assembly fitting point of the corresponding target part according to the contact point and the corresponding constraint direction.
7. The simulation-based suspension parameter adjustment method of claim 6, further comprising, prior to assembly iterations of each of the assembly fitting points based on the tolerance analysis model: determining parts needing to be introduced into positioning in the assembly structure tree according to historical assembly data; and acquiring a preset virtual positioning tool of the part needing to be introduced to be positioned, and performing assembly iteration based on the preset virtual positioning tool.
8. The simulation-based suspension parameter adjustment method of claim 7, wherein performing assembly iterations for each of the assembly fitting points based on the tolerance analysis model comprises: Determining the tolerance of each part in the assembly structure tree, the tolerance of the preset virtual positioning tool and the distribution form of assembly data after the assembly of the corresponding part in the production process in a historical time period according to the tolerance analysis model; and finishing initial assembly according to the assembly fitting point, calculating whether the positions of all parts in the current assembly state meet the tolerance and the assembly data distribution form, and if not, adjusting the assembly angle of the corresponding parts according to a preset step length until the corresponding tolerance and the assembly data distribution form are met, so as to obtain the target assembly scheme, wherein the target assembly scheme comprises a position adjustment range of the target parts in the tolerance and the assembly data distribution form.
9. The simulation-based suspension parameter adjustment method according to claim 8, wherein performing physical assembly based on the target assembly scheme and the position adjustment range comprises: configuring the direction adjustment quantity of the connecting point of the corresponding target part according to the position adjustment range; Configuring a pre-tightening positioning tool and a pre-tightening sequence of each part based on the direction adjustment quantity; fastening according to the pre-tightening tool and the pre-tightening sequence, measuring rear suspension parameters according to preset measuring points of corresponding parts, and determining the adjustment sequence of each part according to the measuring results so as to meet assembly tolerance.
10. A simulation-based rear suspension parameter adjustment system, comprising: the assembly tree construction module is used for acquiring target parts associated with each rear suspension parameter so as to construct an assembly structure tree based on connection points of the target parts, wherein the assembly structure tree is used for representing the composition and assembly sequence of different target parts; the fitting point acquisition module is used for determining fitting points of all parts and corresponding target parts according to the fitting structure tree; The tolerance distribution module is used for constructing a tolerance analysis model according to the fit points, carrying out fit iteration on the fit points based on the tolerance analysis model so that the fit tolerance of each fit point meets the preset tolerance constraint, obtaining a target fit scheme and a position adjustment range of the target part based on the corresponding connection point, carrying out physical fit based on the target fit scheme and the position adjustment range, carrying out fit iteration on the fit points based on the tolerance analysis model, and obtaining the target fit scheme, wherein the tolerance analysis model is used for determining the tolerance of each part in the fit structure tree, the tolerance of a preset virtual positioning tool and the fit data distribution form after the corresponding part is assembled in the production process in a historical time period, the initial fit is completed according to the fit points, and calculating whether the position of each part in the current fit state meets the tolerance and the fit data distribution form or not according to the preset step length adjustment fit angle until the corresponding part meets the tolerance and the fit data distribution form, and the target fit scheme is obtained.
11. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the simulation based suspension parameter adjustment method of any one of claims 1 to 9 when the computer program is executed.
12. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of the simulation based suspension parameter adjustment method of any of claims 1 to 9.

Description

Rear suspension parameter adjustment method, system, equipment and medium based on simulation Technical Field The present application relates to the field of simulation-based suspension parameter adjustment methods, systems, devices, and media. Background With the increase of the requirements of consumers on the running stability of the automobile, the design and production and manufacturing ends of the automobile chassis parameters are increasingly paying attention to the actual achievement capacity and the median matching capacity of the chassis parameters. CN108382470B discloses a suspension for a vehicle and a vehicle with the same, the suspension for a vehicle comprises an auxiliary frame, an upper swing arm and two H arms, wherein the two H arms are respectively connected with two ends of the auxiliary frame, a knuckle is arranged on each H arm, one end of the upper swing arm is connected with the knuckle, the other end of the upper swing arm is connected with the auxiliary frame, and the auxiliary frame, the upper swing arm and the H arms are all aluminum alloy parts. The structure greatly improves the structural arrangement space of the chassis, and improves the economy and the stability of the product. CN109333048a discloses a camber angle automatic regulating apparatus, its characterized in that includes first location clamping mechanism, second location clamping mechanism, guiding mechanism, tightening mechanism and workstation, first location clamping mechanism includes first location mechanism and first clamping mechanism, second location clamping mechanism includes second location mechanism and second clamping mechanism, be provided with the frame on the workstation, first clamping mechanism sets up on the workstation, first clamping mechanism's side is provided with rather than mutually supporting first location mechanism, second location mechanism sets up in the frame, second clamping mechanism with second location mechanism is connected, guiding mechanism with second clamping mechanism is connected, second location clamping mechanism's both sides are provided with rather than mutually supporting tightening mechanism, and this frock has improved manual adjustment operation to a certain extent, has promoted the manufacturing efficiency of product. CN113435029A discloses an automatic modeling method, an automatic modeling device and a storage medium for automobile chassis dynamics analysis, which comprise the following steps of S1, obtaining parameter information and writing the parameter information into an Excel input table, S2, building a corresponding basic model according to chassis suspension types, exporting the basic model into a cdb file identified by dynamics analysis software, S3, reading a dynamics analysis software installation address through a Python automatic modeling calculation script, S4, reading suspension model parameters through the Python automatic modeling calculation script, determining a cdb file corresponding to the basic model, S5, reading modeling parameters through the Python automatic modeling calculation script and writing the modeling parameters into a cdb file of the basic model, S6, reading load parameters through the Python automatic modeling calculation script and writing the load parameters into a command file in the dynamics analysis software, and driving the dynamics analysis software to perform whole automobile load setting simulation. According to the patent, modeling parameters and load parameters in an Excel input table are read through a Python automatic modeling calculation script, and the read modeling parameters and load parameters are written into a cdb file of a basic model and a command file of dynamics analysis software respectively, so that quick, efficient and low-error-rate automobile chassis dynamics analysis simulation automatic modeling is realized. However, the patent only models preset modeling parameters and load parameters, so that the candidate parameters are difficult to effectively analyze and adjust in real time, and the feasibility of the parameters is difficult to evaluate. The product design, the tool implementation and the parameter analysis method only complete part of the design of the chassis four-wheel positioning parameters, and the manufacturing realizability of the parameters which are more concerned for the product manufacture and the design reservation rationality analysis are still blank. As the iteration speed of market product updates increases, analysis of parameter availability is increasingly important for the forward contribution of time and equipment investment. Disclosure of Invention In view of the problems in the prior art, the application provides a method, a system, equipment and a medium for adjusting rear suspension parameters based on simulation, which mainly solve the problems that the existing parameter adjustment mode is low in efficiency and difficult to meet market demands. In order to achieve t