Using System Identification to Compare Global and Local Aerodynamic Modeling from Flight Data

Author

Toby Earl SorensenFollow

Date of Award

5-2013

Degree Type

Thesis

Degree Name

Master of Science

Major

Engineering Science

Major Professor

Uwe P Solies

Committee Members

Borja Martos, Trevor M. Moeller

Abstract

A method for identifying and comparing a longitudinal global aerodynamic model to a longitudinal local aerodynamic model for UTSI’s Piper Saratoga aircraft is explained and demonstrated. Large amplitude piloted inputs were used to estimate global nonlinear aerodynamic models from flight data. Flight derived global aerodynamic model structures, model parameter estimates, and associated uncertainties were provided for the longitudinal dimensional force and moment. The results from the global aerodynamic modeling were compared to local linear aerodynamic modeling results gathered with traditional small amplitude doublet inputs. The results from large amplitude piloted inputs compared favorably with small amplitude piloted inputs by ten percent in almost all cases and in significantly less test time.

Recommended Citation

Sorensen, Toby Earl, "Using System Identification to Compare Global and Local Aerodynamic Modeling from Flight Data. " Master's Thesis, University of Tennessee, 2013.
https://trace.tennessee.edu/utk_gradthes/1682