Accession Number:

ADA244711

Title:

Identification of Aerodynamic Coefficients Using Computational Neural Networks

Descriptive Note:

Corporate Author:

PRINCETON UNIV NJ DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

1992-01-09

Pagination or Media Count:

13.0

Abstract:

Precise, smooth aerodynamic models are required for implementing adaptive, nonlinear control strategies. Accurate representations of aerodynamic coefficients can be generated for the complete flight envelope by combining computational neural network models with an Estimation-Before-Modeling paradigm for on-line training information. A novel method of incorporating first-partial-derivative information is employed to estimate the weights in individual feedforward neural networks for each aerodynamic coefficient. The method is demonstrated by generating a model of the normal force coefficient of a twin-jet transport aircraft from simulated flight data, and promising results are obtained.

Subject Categories:

  • Aerodynamics
  • Transport Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE