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Flight Vibration Testing of the T-FLEX UAV using Online Modal Analysis

Soal, Keith Ian and Volkmar, Robin and Thiem, Carsten and Sinske, Julian and Meddaikar, Muhammad Yasser and Govers, Yves and Böswald, Marc and Teubl, Daniel and Bartasevicius, Julius and Nagy, Mihaly and Vanek, B. (2023) Flight Vibration Testing of the T-FLEX UAV using Online Modal Analysis. AIAA SciTech, 23.-27. Jan. 2023, National Harbor, Md, USA.

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Flight testing of the UAV demonstrator T-FLEX in the EU project FLIPASED has provided a platform to demonstrate the capabilities of an online modal identification system based on miniaturized hardware. The system uses data from Micro Electro Mechanical System MEMS sensors via a real time interface to the Flight Control Computer FCC. The signal processing, modal analysis and mode tracking using machine learning are performed using state of the art algorithms in Python and run on the Onboard Computer OBCII which is a Raspberry Pi 4. The data is encoded and transmitted via radio frequency RF telemetry to a ground station, where it is decoded and plotted in an interactive GUI. The natural frequencies and damping ratios can be visualized as a function of time, Mach number or altitude. This allows engineers on the ground to assess the flutter stability of the aircraft in real time during flight testing. A flight test campaign at the DLR airport Cochstedt served as the first deployment of the flutter monitoring system. The system was demonstrated to function robustly without bugs or system failures and was capable of running in real time. The modal parameters were identified with high certainty and could be accurately tracked throughout the flight envelope. The integration of the online modal analysis system with the onboard flight control system for active flutter control will be the next logical progression of the developed system.

Item URL in elib:https://elib.dlr.de/194734/
Document Type:Conference or Workshop Item (Speech)
Title:Flight Vibration Testing of the T-FLEX UAV using Online Modal Analysis
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Soal, Keith IanUNSPECIFIEDhttps://orcid.org/0000-0002-5132-6823UNSPECIFIED
Volkmar, RobinUNSPECIFIEDhttps://orcid.org/0000-0002-5920-0686UNSPECIFIED
Meddaikar, Muhammad YasserUNSPECIFIEDhttps://orcid.org/0000-0001-9580-7023UNSPECIFIED
Govers, YvesUNSPECIFIEDhttps://orcid.org/0000-0003-2236-596X141888568
Böswald, MarcUNSPECIFIEDhttps://orcid.org/0000-0001-8260-8623UNSPECIFIED
Nagy, MihalyInstitute for Computer Science and Control (SZTAKI)UNSPECIFIEDUNSPECIFIED
Vanek, B.Institute for Computer Science and Control (SZTAKI),UNSPECIFIEDUNSPECIFIED
Date:January 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Flight Vibration Testing, Online Monitoring, UAVs, Operational Modal Analysis, MEMs
Event Title:AIAA SciTech
Event Location:National Harbor, Md, USA
Event Type:international Conference
Event Dates:23.-27. Jan. 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Unmanned Aerial Systems
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Soal, Dr Keith Ian
Deposited On:07 Sep 2023 10:13
Last Modified:07 Sep 2023 10:13

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