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A Target Decomposition Method for Chassis Components Based on Robust Optimization

A technology of objective decomposition and robust optimization, applied in multi-objective optimization, design optimization/simulation, geometric CAD, etc., to reduce the optimization dimension and optimization difficulty, reduce simulation solution time, and realize the effect of automation

Active Publication Date: 2022-06-03
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

[0006] The present invention proposes a target decomposition method for chassis components based on robust optimization. The purpose is to solve the problem of decomposing the driving performance system-level targets into the design indicators of chassis components in the forward development of the chassis, and determine the initial design indicators of the components through numerical optimization. State and design scope, comprehensively balance various performance indicators of the vehicle, achieve system-level goals of vehicle driving performance and personalized chassis performance

Method used

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  • A Target Decomposition Method for Chassis Components Based on Robust Optimization
  • A Target Decomposition Method for Chassis Components Based on Robust Optimization
  • A Target Decomposition Method for Chassis Components Based on Robust Optimization

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Embodiment Construction

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[0044] The DOE design matrix was built using the Latin hypercube method, given 801 sample points. Call the parameters created in step 1.3

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[0053] The key hard point position deviation distribution function is set to be a normal distribution function, and its standard deviation is 0.1 mm. Based on step 3

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[0057] Call the rear suspension K characteristic analysis model to verify the optimization results, and the verification results are shown in Table 5. Results from Table 5

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[0066] The DOE design matrix was built using the Latin hypercube method, given 500 sample points. Call the parameters created in step 1.3

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[0078] Call the rear suspension C characteristic analysis model to verify the optimization results, and the verification results are shown in Table 10. From Table 10 can be

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Abstract

The invention discloses a target decomposition method for chassis components based on robust optimization, which includes: step 1: establishing a parametric analysis model for K&C characteristics of the suspension; step 2: analyzing the DOE of the K characteristics of the suspension; Suspension K characteristic index approximation model; Step 4: Suspension hard point coordinates robust optimization based on suspension K characteristic index; Step 5: Suspension C characteristic DOE analysis; Step 6: Establish elastic component stiffness and suspension C characteristic index Approximate model; Step 7: Multi-objective optimization of suspension elastic component stiffness based on suspension C characteristic index; Step 8: Output suspension hard point and elastic component stiffness. The present invention determines the initial state and design range of parts design indexes through numerical optimization, comprehensively balances various performance indexes of the whole vehicle, and can solve the problem of decomposing driving performance system-level targets into design indexes of chassis parts in the forward development of the chassis.

Description

A target decomposition method for chassis parts based on robust optimization technical field The present invention relates to the field of automobile driving performance analysis, in particular to the preliminary design of vehicle chassis forward development parts and components. A method for decomposing system-level objectives of driving performance into chassis component design indicators in the design phase. Background technique [0002] The key components of the chassis mainly refer to the rod structure that constitutes the front and rear suspensions, as well as elastic components such as bushings and springs. The design indicators of chassis parts mainly include: chassis hard points, that is, the installation point or motion reference point of the parts and the relationship between the elastic parts. stiffness. Among them, the chassis hard point provides the geometric boundary for the design of the chassis rod system and other components, and the stiffness of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/17G06F30/20G06F111/06G06F111/10
CPCG06F30/15G06F30/17G06F30/20G06F2111/06G06F2111/10Y02T90/00
Inventor 陈树霖李学亮陈鹏张松波许春铁
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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