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Modifying a Scientific Flight Control System for Balloon Launched UAV Missions

Schwarzbach, Marc and Wlach, Sven and Laiacker, Maximilian (2015) Modifying a Scientific Flight Control System for Balloon Launched UAV Missions. In: IEEE Aerospace Conference. IEEE. 2015 IEEE Aerospace Conference, 7.-14. Mär. 2015, Big Sky, USA. ISBN 978-1-4799-5379-0

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Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7119055&refinements%3D4230163268%26filter%3DAND%28p_IS_Number%3A7118873%29

Abstract

In this paper we present our work on enabling Balloon launched high altitude UAV Missions for an autopilot system previously used only at lower levels in visual line of sight conditions. One field of our research in the context of flying robotics is focused on high altitude pseudo satellites (HAPS). To gain operational experience in high altitude flying and for system and payload testing, a balloon launched small UAV (sub 10kg) system was designed including building an optimized airframe. Balloon launching was chosen because it offers fast and clearly regulated access to the desired altitudes. Our autopilot system has proven its capabilities in many years of flight experiments with different platforms (helicopter and fixed wing). The main characteristics are modularity and easy use for scientists. On the hardware level the task was to integrate the existing segmented systems of the research autopilot in a compact form factor, with the possible use in larger platforms in mind. The design was driven by the special thermal requirements resulting from flying in stratospheric conditions. In the autopilot software, several mission specific functions had to be added, which only required moderate effort due to the modular system design. Major changes included adding a flight termination manager. A launch routine was developed allowing a safe transition from free-fall to stable horizontal flight in thin air after being dropped from the balloon. Extensive testing was performed to validate the design. Simulating the mission, including balloon ascend, was used to check the mission software. Thermal and pressure conditions at altitude were replicated in a thermal vacuum chamber with additional sensors applied to identify problems. The simulation and control laws were verified by means of low altitude test flights.

Item URL in elib:https://elib.dlr.de/100779/
Document Type:Conference or Workshop Item (Speech)
Title:Modifying a Scientific Flight Control System for Balloon Launched UAV Missions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwarzbach, Marcmarc.schwarzbach (at) dlr.deUNSPECIFIED
Wlach, Svensven.wlach (at) dlr.deUNSPECIFIED
Laiacker, Maximilianmaximilian.laiacker (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:IEEE Aerospace Conference
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:IEEE
ISBN:978-1-4799-5379-0
Status:Published
Keywords:DLR HABLEG – High Altitude Balloon Launched Experimental Glider, Stratosphäre, Stratosphärenflug, High Altitude Pseudo Satellite, Abwurf, UAV, unbemannt, Dauerflug, Solarflugzeug, ELHASPA
Event Title:2015 IEEE Aerospace Conference
Event Location:Big Sky, USA
Event Type:international Conference
Event Dates:7.-14. Mär. 2015
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben Weiterentwicklung Robotik - Mechatronik und Dynamik
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics (since 2013) > Mechatronic Components and Systems
Deposited By: Wlach, Sven
Deposited On:15 Dec 2015 11:12
Last Modified:31 Jul 2019 19:58

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