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Design and Verification of a Linear Parameter Varying Control Law for a Transport Aircraft

Weiser, Christian and Ossmann, Daniel and Kuchar, Richard and Looye, Gertjan (2019) Design and Verification of a Linear Parameter Varying Control Law for a Transport Aircraft. 5th CEAS Specialist Conference on Guidance, Navigation & Control, 03. - 05. Apr. 2019, Mailand, Italien.

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Abstract

This paper presents the design, implementation and simulator verification of inner loop control laws based on linear parameter varying controller design techniques for a CS-25 certified fly-by-wire test aircraft. The synthesis method provides, in contrast to standard gain scheduling techniques, stability and robustness guarantees over the whole defined parameter envelope. Furthermore, it includes the design of the scheduling already in the synthesis process and avoids its a posteriori design. For the controller design, grid based linear parameter varying models of the longitudinal and lateral motion of the aircraft are generated. The longitudinal motion is augmented with two different reference tracking modes: load-factor and pitch rate command. The two control laws are compared in flight by the pilot to validate the handling qualities. The lateral motion control law features a rate command / attitude hold behavior, similar to schemes commonly used in fly-by-wire transport aircraft. Results from a simulation based verification campaign using DLR’s 6 degree of freedom Robotic Motion Simulator are presented as final results in this paper. The simulator verification was conducted as preparation for flight tests of the designed control laws on a Cessna Citation II (550) aircraft.

Item URL in elib:https://elib.dlr.de/127005/
Document Type:Conference or Workshop Item (Speech)
Title:Design and Verification of a Linear Parameter Varying Control Law for a Transport Aircraft
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Weiser, ChristianChristian.Weiser (at) dlr.dehttps://orcid.org/0000-0002-2968-6961
Ossmann, DanielDaniel.Ossmann (at) dlr.deUNSPECIFIED
Kuchar, RichardRichard.Kuchar (at) dlr.deUNSPECIFIED
Looye, GertjanGertjan.Looye (at) dlr.deUNSPECIFIED
Date:April 2019
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Flight Control Design, LPV, Flight Testing, Simulation Based Verification
Event Title:5th CEAS Specialist Conference on Guidance, Navigation & Control
Event Location:Mailand, Italien
Event Type:international Conference
Event Dates:03. - 05. Apr. 2019
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: Weiser, Christian
Deposited On:13 May 2019 14:54
Last Modified:31 Jul 2019 20:24

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