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Analysis of Automatic Control Function Effects on Vertical Tail Plane Critical Load Conditions

Kier, Thiemo M. and Müller, Reiko and Looye, Gertjan (2020) Analysis of Automatic Control Function Effects on Vertical Tail Plane Critical Load Conditions. In: AIAA Scitech Forum, 2019. AIAA SciTech 2020, 6.-10. Jan. 2020, Orlando, USA. doi: 10.2514/6.2020-1621.

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Official URL: http://dx.doi.org/10.2514/6.2020-1621


This paper presents a modelling scheme suitable for loads analysis of maneuvers and gusts of flexible aircraft with active control systems. In contrast to most ongoing research the component to be investigated is not the wing but the vertical tail plane (VTP). Critical load conditions for vertical tail plane include yawing maneuver conditions as well as discrete lateral gusts. A new rudder reversal load condition features a three full reversals of the rudder pedal input instead of just one step input and a mere return to neutral. This condition, where resulting loads are considered ultimate, was mainly motivated by wake vortex encounters during which the pilots made excessive use of the rudder. The design loads resulting from all conditions are heavily influenced by the flight control system, the underlying control law design method, and associated control law parameters. This gives rise to interesting trade-offs between handling qualities and loads sizing the VTP structure. Therefore, in this paper the influence of different types of lateral control laws on the loads of the different gust and maneuver conditions for certification as specified by the authorities is analyzed. The control laws considered vary from basic yaw damping with rudder travel limitation to full roll and yaw command augmentation systems. From a design methodology point of view, classical and (incremental) Nonlinear Dynamic Inversion-based methods are analyzed.

Item URL in elib:https://elib.dlr.de/138752/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of Automatic Control Function Effects on Vertical Tail Plane Critical Load Conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kier, Thiemo M.Thiemo.Kier (at) dlr.deUNSPECIFIED
Müller, ReikoReiko.Mueller (at) dlr.deUNSPECIFIED
Looye, GertjanGertjan.Looye (at) DLR.deUNSPECIFIED
Date:January 2020
Journal or Publication Title:AIAA Scitech Forum, 2019
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2020-1621
Keywords:VTP Loads, Control Laws, Nonlinear Dynamic inversion, Wake vortex encounters, gust loads, manoeuvre loads
Event Title:AIAA SciTech 2020
Event Location:Orlando, USA
Event Type:international Conference
Event Dates:6.-10. Jan. 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Aircraft System Dynamics
Deposited By: Kier, Thiemo
Deposited On:02 Dec 2020 13:34
Last Modified:02 Dec 2020 13:34

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