Functional approximations to experimental data

Bera, Rajendra K (1975) Functional approximations to experimental data. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

In engineering sciences, it is often necessary to approximate a function to a given set of experimental data13; either for computational ease or to evaluate the emperical13; constants in a semi-emperical formulation. In either case, 13; one is basically interested in getting the closest fit to13; the provided data by selecting a function with one or more13; unknown constants. A commonly used method is to choose a13; sequence of functions usually polynomials with unknown13; constants which is approximated in a linear least squares13; sense. This results in a set of linear simultaneous equations in the unknown constants. The drawbacks of the method are that not all types of experimental data have a good fit with few terms, and with larger number of terms the resulting coefficient matrix often becomes quickly 13; ill-conditioned.

Item Type:	Monograph (Technical Report)
Uncontrolled Keywords:	Experimental data
Subjects:	AERONAUTICS > Aerodynamics
Depositing User:	Mr. Ravikumar R
Date Deposited:	29 Aug 2006
Last Modified:	24 May 2010 04:19
URI:	http://nal-ir.nal.res.in/id/eprint/2566

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