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arXiv 2107.06185eess.SYcs.SY
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基于不确定性建模数据挖掘的汽车系统安全性设计新方法

A new method for vehicle system safety design based on data mining with uncertainty modeling

Xianping Du, Binhui Jiang, Feng Zhu

摘要:

在这项研究中,一种新的基于数据挖掘的设计方法已经开发出设计复杂的机械系统,如防撞客车的不确定性建模。该方法允许探索大的碰撞仿真数据集,以自上而下的方式在多个级别(主要能量吸收系统,部件和几何特征)设计车辆,并基于整个车身安全要求导出设计规则,以做出对部件和子部件级设计的决策。通过对整车和部件仿真数据集的挖掘,建立决策树,揭示参数间的相互关系,导出设计规则,得到性能良好的设计方案。这种方法已被扩展到会计设计变量的不确定性。提出了一种新的不确定数据决策树算法(DTUD),用于产生所需的设计和评估由于设计变量的不确定性而引起的设计性能变化。通过试验设计和碰撞有限元分析相结合的方法实现了该方法的框架,并通过设计一辆轿车进行正面碰撞验证。结果表明,该方法能够有效地实现设计目标。通过应用新的方法,也大大提高了最终设计的可靠性。这种方法有可能被应用为一个通用的设计方法,为广泛的复杂结构和机械系统。

英文摘要:

In this research, a new data mining-based design approach has been developed for designing complex mechanical systems such as a crashworthy passenger car with uncertainty modeling. The method allows exploring the big crash simulation dataset to design the vehicle at multi-levels in a top-down manner (main energy absorbing system, components, and geometric features) and derive design rules based on the whole vehicle body safety requirements to make decisions towards the component and sub-component level design. Full vehicle and component simulation datasets are mined to build decision trees, where the interrelationship among parameters can be revealed and the design rules are derived to produce designs with good performance. This method has been extended by accounting for the uncertainty in the design variables. A new decision tree algorithm for uncertain data (DTUD) is developed to produce the desired designs and evaluate the design performance variations due to the uncertainty in design variables. The framework of this method is implemented by combining the design of experiments (DOE) and crash finite element analysis (FEA) and then demonstrated by designing a passenger car subject to front impact. The results show that the new methodology could achieve the design objectives efficiently and effectively. By applying the new method, the reliability of the final designs is also increased greatly. This approach has the potential to be applied as a general design methodology for a wide range of complex structures and mechanical systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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