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Robust Performance Analysis Applied to Loads Computation of Flexible Aircraft

Knoblach, Andreas (2013) Robust Performance Analysis Applied to Loads Computation of Flexible Aircraft. 16th International Forum on Aeroelasticity and Structural Dynamics, 24.-26 Jun. 2013, Bristol, England.

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Abstract

This paper demonstrates how the robust performance analysis framework can be used to determine worst case loads of flexible aircraft due to 1-cos gusts. This framework is a part of control theory and is used to characterize a system by input-output norms: e.g. the induced L2-L∞ norm represents the worst case energy-to-peak gain. Two very efficient ways to compute this norm are presented. Based on the physical interpretation of this norm, an aircraft model is weighted such that the induced L2-L∞ norm of the weighted system represents a tight but guaranteed upper bound for 1-cos gusts and similar excitations. The analysis results are compared to simulations. Since the energy-to-peak gain can be computed in a very efficient way for LTI models, the norm is used to quickly obtain an upper bound for loads and to identify critical flight conditions. In a second example, the analysis is additionally performed on an uncertain model.

Item URL in elib:https://elib.dlr.de/83218/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Robust Performance Analysis Applied to Loads Computation of Flexible Aircraft
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knoblach, AndreasAndreas.Knoblach (at) DLR.deUNSPECIFIED
Date:June 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Robust performance analysis, Loads analysis, Discrete gust loads, Worst case loads, Uncertain models
Event Title:16th International Forum on Aeroelasticity and Structural Dynamics
Event Location:Bristol, England
Event Type:international Conference
Event Dates:24.-26 Jun. 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems & Cabin (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Aircraft System Dynamics
Deposited By: Knoblach, Andreas
Deposited On:08 Jul 2013 10:14
Last Modified:12 Dec 2013 22:07

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