Disturbance observer-based backstepping terminal sliding mode aeroelastic control of airfoils

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dc.contributor.authorLiu, Shiqian
dc.contributor.authorYang, Congjie
dc.contributor.authorZhang, Qian
dc.contributor.authorWhidborne, James F
dc.date.accessioned2024-11-14T10:06:01Z
dc.date.available2024-11-14T10:06:01Z
dc.date.freetoread2024-11-14
dc.date.issued2024-10-25
dc.date.pubOnline2024-10-25
dc.description.abstractThis paper studies aeroelastic control for a two-dimensional airfoil–flap system with unknown gust disturbances and model uncertainties. Open loop limit cycle oscillation (LCO) happens at the post-flutter speed. The structural stiffness and quasi-steady and unsteady aerodynamic loads of the aeroelastic system are represented by nonlinear models. To robustly suppress aeroelastic vibration within a finite time, a backstepping terminal sliding-mode control (BTSMC) is proposed. In addition, a learning rate (LR) is incorporated into the BTSMC to adjust how fast the aeroelastic response converges to zero. In order to overcome the fact that the BTSMC design is dependent on prior knowledge, a nonlinear disturbance observer (DO) is designed to estimate the variable observable disturbances. The closed-loop aeroelastic control system has proven to be globally asymptotically stable and converges within a finite time using Lyapunov theory. Simulation results of an aeroelastic two-dimensional airfoil with both trailing-edge (TE) and leading-edge (LE) control surfaces show that the proposed DO-BTSMC is effective for flutter suppression, even when subjected to gusts and parameter uncertainties.
dc.description.journalNameAerospace
dc.description.sponsorshipThis research was funded by the National Natural Science Foundation of China (No. 52272400 and No. 10577012).
dc.identifier.citationLiu S, Yang C, Zhang Q, Whidborne JF (2024) Disturbance observer-based backstepping terminal sliding mode aeroelastic control of airfoils. Aerospace, Volume 11, Issue 11, October 2024, Article number 882
dc.identifier.eissn2226-4310
dc.identifier.elementsID555612
dc.identifier.issn2226-4310
dc.identifier.issueNo11
dc.identifier.paperNo882
dc.identifier.urihttps://doi.org/10.3390/aerospace11110882
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23169
dc.identifier.volumeNo11
dc.languageEnglish
dc.language.isoen
dc.publisherMDPI
dc.publisher.urihttps://www.mdpi.com/2226-4310/11/11/882
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject4007 Control Engineering, Mechatronics and Robotics
dc.subject40 Engineering
dc.subject4001 Aerospace Engineering
dc.subject4001 Aerospace engineering
dc.subjectaeroelastic two-dimensional airfoil
dc.subjectflutter suppression
dc.subjectbackstepping control
dc.subjectfast nonsingular terminal sliding-mode control
dc.subjectnonlinear disturbance observer
dc.titleDisturbance observer-based backstepping terminal sliding mode aeroelastic control of airfoils
dc.typeArticle
dcterms.dateAccepted2024-10-14

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