Research on the Establishing Model Method of Engine Eternal Characteristic Curve Based on F Distribution

Jia Li; Gui Yu Lin; Qiu Fang Xia

doi:10.4028/www.scientific.net/AMR.971-973.684

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 971-973Research on the Establishing Model Method of...

Research on the Establishing Model Method of Engine Eternal Characteristic Curve Based on F Distribution

Abstract:

The external characteristic curve of engine is the basis of choosing engine, matching and optimizing dynamic performance correctly. At present, most models of the external characteristic curve of engine are carried out by using polynomial regression equation for fitting the external characteristic curve of engine. In this paper, an establishing model method of the external characteristic curve of engine based on F distribution testing is proposed. F test with variance analysis is implemented for obtaining the difference of square sum of return difference between the former equation and the latter equation. If the test doesn’t go through, it can rise one level automatically, until the difference about square sum of return difference of the before-after fitting equation is no significant can it stop. This method provides a theoretical criterion for establishing model of the external characteristic curve of engine. When it is applied to the engineering case, the model will have a higher fitting precision.

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Info:

Periodical:

Advanced Materials Research (Volumes 971-973)

Pages:

684-687

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.971-973.684

Citation:

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Online since:

June 2014

Authors:

Jia Li*, Gui Yu Lin, Qiu Fang Xia

Keywords:

Characteristic Curve, Engine, F Distribution, Least-Square Method (LSM), Regression Equation

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* - Corresponding Author

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