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Lidar-Based Gust Load Alleviation - Results Obtained on the Clean Sky 2 Load Alleviation Benchmark

Fezans, Nicolas and Wallace, Christian and Kiehn, Daniel and Cavaliere, Davide and Vrancken, Patrick (2022) Lidar-Based Gust Load Alleviation - Results Obtained on the Clean Sky 2 Load Alleviation Benchmark. In: 19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022. IFASD 2022, 2022-06-13 - 2022-06-17, Madrid, Spanien. ISBN 978-840942353-8.

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Abstract

This paper presents a design methodology for lidar-based load alleviation functions and the results obtained for an industrial modern jet aircraft configuration. At the heart of the methodology is a multi-channel structured H-inifinity preview-control synthesis in discrete time. The load alleviation function works in a pure feedforward manner, which ensures that the handling qualities are not modified. The design methodology contains a couple of iterative loops permitting the refinement of the design and the fine-tuning the tradeoff between all control objectives. At the end, the objective function contained forty objectives, resulting from combining ten performance channels with four different local models (different flight conditions and mass cases). The complete lidar-based load alleviation system was evaluated using a multi-rate hybrid simulation environment with the load alleviation controller running at 80 Hz and including the lidar sensor simulation and an online gust/wind estimation algorithm. The obtained results are very promising: the objective of 10% wing bending moment reduction was achieved along the entire wing except at the wing tip while keeping the loads on all other stations within the design loads (often improving them as well). The controller was optimized to achieve this goal with the smallest control deflections and deflection rates possible.

Item URL in elib:https://elib.dlr.de/187462/
Document Type:Conference or Workshop Item (Speech)
Title:Lidar-Based Gust Load Alleviation - Results Obtained on the Clean Sky 2 Load Alleviation Benchmark
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Fezans, NicolasUNSPECIFIEDhttps://orcid.org/0000-0003-4351-3474UNSPECIFIED
Wallace, ChristianUNSPECIFIEDhttps://orcid.org/0000-0003-3400-5451UNSPECIFIED
Kiehn, DanielUNSPECIFIEDhttps://orcid.org/0000-0001-7383-0740148660205
Cavaliere, DavideUNSPECIFIEDhttps://orcid.org/0009-0001-5501-2370148660207
Vrancken, PatrickDLR, IPAhttps://orcid.org/0000-0003-2364-5576UNSPECIFIED
Date:15 June 2022
Journal or Publication Title:19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISBN:978-840942353-8
Status:Published
Keywords:Lidar; Gust load alleviation; Robus Control; Preview Control
Event Title:IFASD 2022
Event Location:Madrid, Spanien
Event Type:international Conference
Event Start Date:13 June 2022
Event End Date:17 June 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Braunschweig , Oberpfaffenhofen
Institutes and Institutions:Institute of Flight Systems > Flight Dynamics and Simulation
Institute of Atmospheric Physics > Lidar
Institute of Flight Systems
Deposited By: Fezans, Nicolas
Deposited On:07 Sep 2022 16:46
Last Modified:24 Apr 2024 20:48

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