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Design and flight testing of flight control laws integrating incremental nonlinear dynamic inversion and servo current control

Pollack, Tijmen and Looye, Gertjan and Linden, van der, Frans (2019) Design and flight testing of flight control laws integrating incremental nonlinear dynamic inversion and servo current control. AIAA SciTech Forum, 7.-11. Jan. 2019, San Diego, Kalifornien. DOI: 10.2514/6.2019-0130

Full text not available from this repository.

Abstract

Traditionally, aircraft actuator control systems are commanded by means of control surface position or rate references from the flight control laws. This is natural for hydraulic actuators, but less so for electro-mechanical actuators (EMAs). EMAs apply forces or moments that are proportional to their current inputs. For this reason, it has been investigated if this principle can be used within an aircraft flight control system. This has several distinct advantages, including prevention of force fighting between parallel actuators, natural alleviation of structural and actuator loads in the face of atmospheric disturbances, and the possibility to restore reversible control behavior for irreversible systems. A complete design and a flight test campaign were performed using a Cessna Citation II with experimental fly-by-wire system. As a first step, current control loops were designed and tested for the electric aircraft servos. In a second step, an existing set of flight control laws based on incremental nonlinear dynamic inversion was adapted to command current instead of control surface angle commands. After implementation on the aircraft, the integrated system was intensively tested in flight. Direct comparisons with open-loop control were made. The tests were highly successful and very encouraging to further investigate this integrated approach for future applications.

Item URL in elib:https://elib.dlr.de/128284/
Document Type:Conference or Workshop Item (Speech)
Title:Design and flight testing of flight control laws integrating incremental nonlinear dynamic inversion and servo current control
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pollack, TijmenUNSPECIFIEDUNSPECIFIED
Looye, GertjanGertjan.Looye (at) dlr.deUNSPECIFIED
Linden, van der, FransFranciscus.Linden (at) DLR.deUNSPECIFIED
Date:6 January 2019
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2019-0130
Status:Published
Keywords:Flight control, nonlinear control, force control, torque control, incremental nonlinear dynamic inversion, flight testing,
Event Title:AIAA SciTech Forum
Event Location:San Diego, Kalifornien
Event Type:international Conference
Event Dates:7.-11. Jan. 2019
Organizer:American Institute of Aeronautics and Astronautics (AIAA)
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
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Aircraft System Dynamics
Deposited By: Looye, Dr. Gertjan
Deposited On:09 Jul 2019 09:35
Last Modified:17 Jul 2019 11:37

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