Modelling and identification of non-linear aerodynamic functions using B-splines

Autor:	M G Kellett, P D Bruce
Rok vydání:	2000
Předmět:	Nonlinear system Identification (information) Control theory Mechanical Engineering B-spline Aerospace Engineering Applied mathematics Table (database) Aerodynamics Dynamic modelling Mathematics
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 214:27-40
ISSN:	2041-3025 0954-4100
DOI:	10.1243/0954410001531890
Popis:	A method of using B-splines to represent non-linear aerodynamic functions in flight dynamic modelling is presented. This method offers potential advantages over traditional look-up table and polynomial representations for the problem of parameter identification from flight test data. The method offers a natural fit to an underlying smooth function with guaranteed continuity properties. In addition, the B-spline coefficients offer improved conditioning to the identification process, encouraging improved convergence properties of identification algorithms. A reduction in the number of flight tests required is possible, since large portions of non-linear functions can be identified from large-amplitude manoeuvres. In addition, when used with the maximum likelihood estimation method, the Cramer-Rao estimates of parameter confidence are preserved and can be expressed in a B-spline format.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f705888c2a30dc1f4d98f2890988cf41 https://doi.org/10.1243/0954410001531890 Zobrazit plný text záznamu