A Methodology for Model Selection in Engineering Design
A Methodology for Model Selection in Engineering Design
复制标题
工程设计模型选择方法
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
D. McAdams
中科院分区：
文献类型：
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作者：
R. Radhakrishnan;D. McAdams
工程设计包括一系列的阶段，在此期间，设计师需要做出一些决定。由于在初始设计阶段，设计师可用的信息是有限的，为了做出这些决定并能够在设计过程中进一步进行，设计师需要通过使用称为模型的辅助工具来描述产品的性质，可视化形式并预测产品的行为。这些模型指导这些决策，因此，设计人员需要通过构建具有足够精度和分辨率的模型来确保这些决策的下游有效性。由于更高的质量和准确性的信息是最经常伴随着一个模型的成本较高，确定一个令人满意的水平的善良的模型是一个基本的和普遍的问题，在工程。因此，设计模型构建的一个关键方面是决定模型是否适合特定的设计规范或评估，考虑精度和成本因素。本文提出了一种利用效用理论构造设计模型的方法。由于模型选择是一项设计决策，因此通过评估任何模型选择的置信度来考虑参数和模型的不确定性。本文还讨论了一种逆向进行的确定模型要求优度的方法。我们目前这项研究通过应用到赛车摆动酒吧。
Engineering design consists of a series of stages during which a number of decisions need to be made by the designer. Since the information available to the designer is limited during initial design stages, to make these decisions and be able to proceed further in the design process, the designer needs to depict the nature, visualize the form, and predict the behavior of the product through the use of aids called models. These models guide these decisions, therefore, the designer needs to ensure the downstream validity of these decisions by constructing models with sufficient accuracy and resolution. Because higher quality and accuracy of information is most often accompanied by a higher cost for a model, determining a satisfactory level of goodness for a model is a fundamental and pervasive question in engineering. Hence, a key aspect of design model construction is deciding whether a model is appropriate for a particular design specification or evaluation, considering accuracy and cost factors. This paper presents an approach for design model construction using utility theory. Since model selection is a design decision, uncertainties in parameters and models are considered by evaluating the confidence in the selection of any model. A method for proceeding in the reverse manner to determine the required goodness of a model is also discussed. We present this research through application to a race car sway bar.