A hybrid sensitivity analysis for use in early design
Proceedings of the ASME Design Engineering Technical Conference, Vol: 5, Issue: PARTS A AND B, Page: 175-187
2009
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Metrics Details
- Usage1
- Abstract Views1
- Captures5
- Readers5
Conference Paper Description
Sensitivity analyses are frequently used during the design process of engineering systems to qualify and quantify the effect of parametric variation on the performance of a system. Two primary types of sensitivity analyses are generally used: local and global. Local analyses, generally involving derivative-based measures, have a significantly lower computational burden than global analyses but only provide measures of sensitivity around a nominal point. Global analyses, generally performed with a Monte Carlo sampling approach and variation-based measures, provide a complete description of a concept's sensitivity but incur a large computational burden and require significantly more information regarding the distributions of the design parameters in a concept. Local analyses are generally suited to the early stages of design when parametric information is limited and a large number of concepts must be considered (necessitating a light computational burden). Global analyses are more suited towards the later stages of design when more information regarding parametric distributions is available and fewer concepts are being considered. Current derivative-based local approaches provide a significantly different set of measures than a global variation-based analysis. This makes a direct comparison of local to global measures impossible. To reconcile local and global sensitivity analyses, a hybrid local variation based sensitivity (HyVar) approach is presented. This approach has a similar computational burden to a local approach but produces measures in the same format as a global variation-based approach (contribution percentages). This HyVar sensitivity analysis is developed in the context of a functionality-based design and behavioral modeling framework. An example application of the method is presented along with a summary of results produced from a more comprehensive example. Copyright © 2009 by ASME.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=82155162145&origin=inward; http://dx.doi.org/10.1115/detc2009-87120; https://asmedigitalcollection.asme.org/IDETC-CIE/proceedings/IDETC-CIE2009/49026/175/345263; http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1649926; https://bearworks.missouristate.edu/articles-cnas/3141; https://bearworks.missouristate.edu/cgi/viewcontent.cgi?article=4140&context=articles-cnas; https://dx.doi.org/10.1115/detc2009-87120
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