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Enhancing flight control in case of total angle of attack sensor loss

Joos, Hans-Dieter and Ossmann, Daniel (2016) Enhancing flight control in case of total angle of attack sensor loss. 3rd International Conference on Control and Fault-Tolerant Systems, 7.-9. Sep. 2016, Barcelona, Spanien.

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Abstract

To maintain nominal flight control system functionalities during fault scenarios, enhancements of the stateof- practice angle of attack fault accommodation strategies are presented. The enhancements rely on combining modern fault detection and diagnosis (FDD) techniques with a robust envelope protection algorithm. The FDD system is able to detect and isolate partial or total losses of angle of attack sensors. The angle of attack is not a directly controlled variable in the flight control system, but is used to protect the aircraft from exceeding the flight envelope. To avoid the state-of-practise degradation towards an unprotected control law in case of a total angle of attack sensor loss, longitudinal protection law functionalities independent of the lost measurements are proposed. They provide satisfactory prevention of reaching difficult flight conditions and can be operated together with the nominal command and stability augmentation system. This paper discusses the protection law design in conjunction with the sensor monitoring scheme and the nominal inner loop control law. The latest results of an extensive industrial validation and verification campaign are reported.

Item URL in elib:https://elib.dlr.de/104945/
Document Type:Conference or Workshop Item (Speech)
Title:Enhancing flight control in case of total angle of attack sensor loss
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Joos, Hans-DieterDieter.Joos (at) dlr.deUNSPECIFIED
Ossmann, Danieldossmann (at) umn.eduUNSPECIFIED
Date:9 September 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Fault tolerant control, Flight envelope protections, Fault tolerant control
Event Title:3rd International Conference on Control and Fault-Tolerant Systems
Event Location:Barcelona, Spanien
Event Type:international Conference
Event Dates:7.-9. Sep. 2016
Organizer:Systol Association
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: Joos, Hans-Dieter
Deposited On:14 Sep 2016 10:22
Last Modified:17 Jul 2019 16:02

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