Identification of Unsteady Aerodynamics and Aeroelastic Integro-Differential Systems

Gupta, Naren K. and Iliff, Kenneth W. (1985) Identification of Unsteady Aerodynamics and Aeroelastic Integro-Differential Systems. Technical Report NASA TM-86749, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

This report deals with the problem of estimating integro-differential models based on test or simulation data. The identification techniques proposed for estimating parameters in models described by differential equations need to be considerably extended to deal with the integral terms. Conditions under which the integral terms may be approximated by algebraic values are discussed. The integro-differential models discussed in this report are related to indicial models proposed by aerodynamicists to describe unsteady flow.

EPrint Type:	NASA Technical Memorandum
Keywords:	Indicial functions, Integro-differential equations, Parameter estimation, Stability and control, Unsteady aerodynamics
Subjects:	(59 - 67) Mathematical and Computer Sciences: (66) Systems Analysis Aircraft/Project: Nonaircraft-specific
ID Code:	589
Deposited On:	31 January 2006
Additional Information:	32 pages.