A Reliability Optimization Design Method for Vehicle Occupant Restraint System Containing Hybrid Model

A technology of occupant restraint and optimal design, which is applied in the field of vehicle safety to improve calculation efficiency and reduce deviation

Active Publication Date: 2021-11-05
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the above-mentioned problems existing in the reliability optimization design method of the existing automobile occupant restraint system, and to propose a method for the reliability optimization design of the automobile occupant restraint system with a hybrid model

Method used

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  • A Reliability Optimization Design Method for Vehicle Occupant Restraint System Containing Hybrid Model
  • A Reliability Optimization Design Method for Vehicle Occupant Restraint System Containing Hybrid Model
  • A Reliability Optimization Design Method for Vehicle Occupant Restraint System Containing Hybrid Model

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Embodiment Construction

[0060] General method of the present invention is described below in conjunction with accompanying drawing:

[0061] Such as figure 1 As shown, a method for reliability optimization design of vehicle occupant restraint system with mixed model includes the following steps:

[0062] Step 1: Establish a numerical simulation model of the vehicle occupant restraint system, and set deterministic design variables, probability variables, interval variables, objective functions, and constraint functions for the protection performance of the vehicle occupant restraint system, thereby establishing a vehicle occupant constraint based on a hybrid model The system reliability optimization design problem, the specific expression is as follows:

[0063]

[0064] In the above formula, f WIC (X,μ P ,μ Q ) is the objective function, g k (X,P,Q) is the limit state function, β k is the reliability index to be sought, β k t Preset the threshold for the reliability index, X is an n-dimens...

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Abstract

The invention discloses a reliability optimization design method of an automobile occupant restraint system including a mixed model, which describes uncertain variables through a probability model and an interval model, and establishes a reliability optimal design of an automobile occupant restraint system based on a mixed model Problem; In order to improve computational efficiency, an approximate reliability optimization design problem is constructed based on radial basis functions, and the original three-level nested The approximate reliability optimization design problem is transformed into a single-layer approximate reliability optimization design problem, and the optimal solution that meets the design requirements is solved by the genetic algorithm, thereby realizing the efficient solution of the reliability optimization design problem and effectively ensuring the safety of the car occupants The invention not only can effectively improve the protective performance of the vehicle occupant restraint system, but also can essentially improve the calculation efficiency and solution quality of optimization, and has extensive engineering application value in the field of vehicle safety.

Description

technical field [0001] The invention relates to the field of vehicle safety, in particular to a reliability optimization design method for an automobile occupant restraint system including a hybrid model. Background technique [0002] When a car collides, the car occupant restraint system composed of seat belts, safety seats, airbags and other devices can not only effectively buffer the impact load on the occupants, but also avoid secondary collisions between the occupants and the interior of the vehicle body. Thereby play the role of car occupant protection. Studies have shown that the protective performance of the occupant restraint system will directly determine the degree of occupant injury and death rate. Therefore, the vehicle occupant restraint system is the top priority of vehicle safety technology research. [0003] For the design of vehicle occupant restraint system, the existing optimal design methods have the following problems: [0004] 1. The existing optimi...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06F30/20G06F30/15G06F111/04G06F111/10G06F119/02
CPCG06F30/15G06F30/20G06F2111/04G06F2111/10G06F2119/02
Inventor刘鑫周振华胡林
OwnerCHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY