An automated procedure for the modeling of aerodynamics data obtained from wind-tunnel measurements has been developed. Heuristics and multivariable Chebyshev orthogonal polynomials are combined to construct function approximations of the tabular aerodynamic database. This method results in a significant reduction in the size of the database and the man-hours required for developing an explicit mathematical model. The software design philosophy and validation results using actual aerodynamic data for the F16 fighter aircraft are presented here. This project demonstrated the feasibility of using Chebyshev polynomials for reducing the size of a multivariable aerodynamic database. The resulting function approximation can capture the dominant trends in the data and the procedure is suitable for the reduction of wind-tunnel measurements. Up to now the described Aircraft Database Modeling Package (ADMOP) has been applied to the aerodynamic and thrust database for other types of aircraft and the results in terms of data compression, model construction and time saving are encouraging.
Compression of aircraft aerodynamic database using multivariable Chebyshev polynomials
Reduktion einer Aerodynamik-Tabellendatenbasis für Flugzeuge mittels Tschebyscheff-Polynomen mit mehreren Variablen
Advances in Engineering Software ; 28 , 2 ; 133-141
1997
9 Seiten, 9 Bilder, 1 Tabelle, 5 Quellen
Aufsatz (Zeitschrift)
Englisch
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