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Assessment method for fuzzy reliability of automobile passenger restraint system

A technology of occupant restraint and reliability, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as performance fluctuation, failure, and design parameter uncertainty of automobile occupant restraint systems

Active Publication Date: 2013-10-09
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the automotive occupant restraint system is affected by factors such as manufacturing technology and measurement technology, and some design parameters are often uncertain
These uncertain factors will cause certain fluctuations in the performance of the vehicle occupant restraint system, and there is a certain risk of failure.

Method used

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  • Assessment method for fuzzy reliability of automobile passenger restraint system
  • Assessment method for fuzzy reliability of automobile passenger restraint system
  • Assessment method for fuzzy reliability of automobile passenger restraint system

Examples

Experimental program
Comparison scheme
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Embodiment

[0094] figure 2 It is a schematic diagram of the simulation model of the vehicle occupant restraint system in the present invention. combined with figure 2 , the present invention will be further described in detail through an embodiment.

[0095] Apply existing multi-rigid body dynamics simulation analysis software, such as MADYMO, to establish such as figure 2 The simulation model of the occupant restraint system of a mini-vehicle in frontal collision with the driver's side is shown.

[0096] The parameters in the vehicle occupant restraint system that have a greater impact on the collision result are selected as uncertain variables. Through the analysis, it is found that the driver's head protection performance can be improved by adjusting the parameters of the seat belt, such as the stiffness of the seat belt and the position of the upper hanging point. Therefore, in this embodiment, the initial strain rate s of the seat belt, the elongation rate e of the seat belt,...

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Abstract

The invention discloses an assessment method for fuzzy reliability of an automobile passenger restraint system. The method is based on a response surface method, firstly, a probabilistic model is used for describing probabilistic parameters in the automobile passenger restraint system, meanwhile a secondary response surface approximation model of the automobile passenger restraint system is built, and through repeated iteration updates of the response surface model, a fuzzy reliability index of the model can be calculated efficiently and quickly. Compared with the design of an automobile passenger restraint system with deterministic parameters, the probabilistic model is used in the assessment method for describing the indeterminacy of the parameters, and fuzzy reliability analysis is carried out on the automobile passenger restraint system based on key design parameters and failure criterion fuzziness. By means of the method, the protection performance of the automobile passenger restraint system can be well assessed, and guidance and advises are provided for the design of the automobile passenger restraint system to some extent.

Description

technical field [0001] The invention belongs to the field of automobile safety, in particular to a fuzzy reliability evaluation method of an automobile occupant restraint system. Background technique [0002] At present, the performance evaluation of the vehicle occupant restraint system is usually verified by multi-rigid body software for simulation analysis and experimental means. The application of this evaluation technology is often based on deterministic parameter conditions. However, the automotive occupant restraint system is affected by factors such as manufacturing technology and measurement technology, and some design parameters are often uncertain. These uncertain factors will cause certain fluctuations in the performance of the vehicle occupant restraint system, and there is a certain risk of failure. Therefore, further research is needed to achieve the purpose of reducing the degree of occupant damage and improving the protection performance of the restraint sy...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 姜潮吴钰龙韩旭
Owner HUNAN UNIV
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