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Active Inceptor Failure as a Trigger for Pilot-Induced Oscillations

Jones, Michael and Barnett, Miles (2020) Active Inceptor Failure as a Trigger for Pilot-Induced Oscillations. Journal of the American Helicopter Society, 65 (2), pp. 1-14. American Helicopter Society. doi: 10.4050/JAHS.65.022004. ISSN 0002-8711.

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Official URL: https://www.ingentaconnect.com/contentone/ahs/jahs/2020/00000065/00000002/art00005


The use of active inceptor systems allows for control of the aircraft even following mechanical failures within the control inceptor. For the specific case of isometric failure, whereby the inceptor "freezes" in position, a virtual force-displacement model is used to continue to provide control input. Testing on DLR's experimental helicopter (active control technology/flying helicopter simulator) has shown the potential to encounter pilot-induced oscillation (PIO) tendencies when flying using this mode. This paper presents results from a simulation campaign undertaken to determine whether PIOs could be exposed through this use of control and/or the resultant severity. The results show that isometric failure caused severe PIOs. Unacceptable failure characteristics were reported by all four pilots. PIO incipience was predicted through the use of offline tools. It is recommended that specific PIO investigations be undertaken during the evaluation of active inceptor failure modes.

Item URL in elib:https://elib.dlr.de/135707/
Document Type:Article
Title:Active Inceptor Failure as a Trigger for Pilot-Induced Oscillations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jones, Michaelmichael.jones (at) dlr.dehttps://orcid.org/0000-0003-1782-739X
Barnett, MilesMiles.Barnett (at) dlr.deUNSPECIFIED
Date:April 2020
Journal or Publication Title:Journal of the American Helicopter Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.4050/JAHS.65.022004
Page Range:pp. 1-14
Publisher:American Helicopter Society
Keywords:Rotorcraft; Pilot-Induced Oscillation; Active Control Inceptor; Failures
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Smart Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: Jones, Michael
Deposited On:20 Oct 2020 15:17
Last Modified:20 Oct 2020 15:17

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