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Design and Flight Testing of Incremental Backstepping based Control Laws with Angular Accelerometer Feedback

Keijzer, Twan and Looye, Gertjan and Chu, Qi Ping and Kampen, van, Erik-Jan (2019) Design and Flight Testing of Incremental Backstepping based Control Laws with Angular Accelerometer Feedback. AIAA SciTech Forum, 7.-11. Jan. 2019, San Diego, Kalifornien. doi: 10.2514/6.2019-0129.

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This paper discusses the design, implementation and flight testing of an incremental Backstepping (IBS) based manual flight control law with angular accelerometer (AA) feedback. The main advantages of incremental control laws are that they only require a partial model of the system and are of low complexity. Incremental control laws for aircraft rotational motion, however, need angular acceleration measurements to compute the control increments. Previously, estimates based on angular rate measurements were used for this. The newly implemented AA feedback is expected to improve the performance of the controller by decreasing the sensor delay. The manual control laws command roll rate/angle, vertical load factor, and side slip angle and have been implemented on a Cessna Citation II aircraft, equipped with an experimental fly-by-wire system. The IBS based control law has an integrated integral control term and uses Pseudo Control Hedging to handle actuator saturations. The IBS based control law is shown to have highly satisfactory performance in flight. Test manoeuvres included standard roll and load factor commands and asymmetric thrust handling. Robustness to model mismatch has been compared in a nonlinear simulation for the controllers with and without AA feedback. In general, the AA feedback improved the tolerance to mismatch substantially.

Item URL in elib:https://elib.dlr.de/128283/
Document Type:Conference or Workshop Item (Speech)
Title:Design and Flight Testing of Incremental Backstepping based Control Laws with Angular Accelerometer Feedback
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Keijzer, TwanTwan.Keijzer (at) dlr.deUNSPECIFIED
Looye, GertjanGertjan.Looye (at) dlr.deUNSPECIFIED
Chu, Qi PingQ.P.Chu (at) tudelft.nlUNSPECIFIED
Kampen, van, Erik-JanE.vanKampen (at) tudelft.nlUNSPECIFIED
Date:6 January 2019
Refereed publication:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2019-0129
Keywords:Flight control, nonlinear control, incremental control, angular acceleration sensors, back stepping control, 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 (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Aircraft System Dynamics
Deposited By: Looye, Dr. Gertjan
Deposited On:09 Jul 2019 09:36
Last Modified:17 Jul 2019 11:36

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