Collocation-based output-error method for aircraft system identification

Dimas Abreu Archanjo Dutra

Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/37480

Type:	Artigo de Evento
Title:	Collocation-based output-error method for aircraft system identification
Authors:	Dimas Abreu Archanjo Dutra
Abstract:	The output-error method is a mainstay of aircraft system identification from flight-test data. It is the method of choice for a wide range of applications, from the estimation of stability and control derivatives for aerodynamic database generation to sensor bias estimation in flight-path reconstruction. However, notable limitations of the output-error method are that it requires ad hoc modifications for applications to unstable systems and it is an iterative method whichis particularly sensitive to the initial guess. In this paper, we show how to reformulate the estimation as a collocation problem, an approach common in other disciplines but seldomly used in flight vehicle system identification. Both formulations are equivalent in terms of having the same solution, but the collocation-based can be applied without modifications or loss of efficiency to unstable systems. Examples with simulated and real-world flight-test data also show that convergence to the optimum is obtained even with poor initial guesses.
Subject:	Engenharia mecânica
language:	eng
metadata.dc.publisher.country:	Brasil
Publisher:	Universidade Federal de Minas Gerais
Publisher Initials:	UFMG
metadata.dc.publisher.department:	ENG - DEPARTAMENTO DE ENGENHARIA MECÂNICA
Rights:	Acesso Aberto
URI:	http://hdl.handle.net/1843/37480
Issue Date:	Sep-2019
metadata.dc.url.externa:	https://arxiv.org/pdf/1909.02838.pdf
metadata.dc.relation.ispartof:	AIAA Aviation 2019 Forum
Appears in Collections:	Artigo de Evento

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