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Evaluation of the Controllability of a High-Altitude Platform in Atmospheric Disturbances Based on Pilot-in-the-Loop Simulations

Hasan, Yasim Julian und Roeser, Mathias Stefan und Voigt, Andreas E. (2021) Evaluation of the Controllability of a High-Altitude Platform in Atmospheric Disturbances Based on Pilot-in-the-Loop Simulations. In: Deutscher Luft- und Raumfahrtkongress. 70. Deutscher Luft- und Raumfahrtkongress, 2021-08-31 - 2021-09-02, Bremen und online.

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Kurzfassung

In the context of the project HAP, the German Aerospace Center (DLR) is currently developing a solar-powered high-altitude platform that is supposed to be stationed in the stratosphere for 30 days. The development process includes the design of the aircraft, its manufacturing and a flight test campaign. Furthermore, a high-altitude demonstration flight is planned. The aircraft operates at extremely low airspeeds, being in the magnitude of around 10 m/s equivalent airspeed, and is therefore profoundly susceptible to atmospheric disturbances. This is particularly critical at low altitudes, where the airspeed is lowest. Hence, both time and location for take-off, landing or low-altitude flight test campaigns need to be selected thoroughly in order to reduce the risk of a loss of aircraft. In this regard, the knowledge about the operational limits of the aircraft with respect to atmospheric conditions is crucial. The less these limits are known, the more conservative the decision about whether to perform a flight on a certain day or not tends to be. On the contrary, if these limits have been adequately investigated, the amount of days and locations that are assessed as suitable for performing a flight might increase. This paper deals with a pilot-in-the-loop simulation campaign that is conducted in order to assess the controllability of the high-altitude platform in atmospheric disturbances. Within this campaign, the pilots are requested to perform practical tasks like maintaining track or altitude, flying a teardrop turn or perform a landing while the aircraft is subject to different atmospheric disturbances including constant wind, wind shear, continuous turbulence, and discrete gusts of different magnitudes. This paper describes the desktop simulator used for the campaign, outlines the entity of investigated test points and presents the assessment method used to evaluate the criticality of the respective disturbances. Finally, a set of restrictions on the acceptable wind conditions for the high-altitude platform are found. The underlying limits comprise a constant wind speed of 3.0 m/s in any direction, except during landing, maximum wind shear of 0.5 m/s^2 and gusts with peak speeds of 1.5 m/s to 2.0 m/s, depending on the direction.

elib-URL des Eintrags:https://elib.dlr.de/147221/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Evaluation of the Controllability of a High-Altitude Platform in Atmospheric Disturbances Based on Pilot-in-the-Loop Simulations
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iD
Hasan, Yasim JulianYasim.Hasan (at) dlr.dehttps://orcid.org/0000-0002-5081-223X
Roeser, Mathias Stefanmathias.roeser (at) dlr.dehttps://orcid.org/0000-0002-9529-7518
Voigt, Andreas E.andreas.voigt (at) dlr.de
Datum:September 2021
Erschienen in:Deutscher Luft- und Raumfahrtkongress
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:high-altitude platform, solar-powered, flight dynamics, gust encounters, atmospheric disturbances, pilot-in-the-loop simulations
Veranstaltungstitel:70. Deutscher Luft- und Raumfahrtkongress
Veranstaltungsort:Bremen und online
Veranstaltungsart:nationale Konferenz
Veranstaltungsbeginn:31 August 2021
Veranstaltungsende:2 September 2021
Veranstalter :Deutsche Gesellschaft für Luft- und Raumfahrt – Lilienthal-Oberth e. V. (DGLR)
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Komponenten und Systeme
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L CS - Komponenten und Systeme
DLR - Teilgebiet (Projekt, Vorhaben):L - Unbemannte Flugsysteme
Standort: Braunschweig
Institute & Einrichtungen:Institut für Flugsystemtechnik
Institut für Flugsystemtechnik > Flugdynamik und Simulation
Hinterlegt von: Hasan, Yasim Julian
Hinterlegt am:01 Feb 2022 09:19
Letzte Änderung:24 Apr 2024 20:45

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