Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control
Typical fault scenarios such as actuator stuck, wingtip damage, and sudden center of gravity change usually bring great challenge to fault-tolerant flight control laws. In this paper, adaptive sliding mode disturbance observer (SMDO) is studied under the background of designing a fault-tolerant flig...
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doaj-368cbe2b5df94b8399a58fbf2f84988e2021-07-01T23:00:42ZengIEEEIEEE Access2169-35362021-01-019926149262810.1109/ACCESS.2021.30921649464305Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight ControlBaoxu Jia0Liguo Sun1https://orcid.org/0000-0002-5552-8289Yanyang Wang2https://orcid.org/0000-0002-2832-7932Xiaoyu Liu3Weigao Dang4School of Aeronautic Science and Engineering, Beihang University, Beijing, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, ChinaSchool of Aeronautic Science and Engineering, Beihang University, Beijing, ChinaTypical fault scenarios such as actuator stuck, wingtip damage, and sudden center of gravity change usually bring great challenge to fault-tolerant flight control laws. In this paper, adaptive sliding mode disturbance observer (SMDO) is studied under the background of designing a fault-tolerant flight controller. This paper proposes a switched adaptive SMDO for observation of system uncertainties considering fault accommodation. It consists of two adaptive SMDOs: baseline gain-adaptation SMDO and fault-oriented gain-adaptation SMDO. The former is designed for observing slow-changing uncertainties, and can guarantee that the observer gains are small when disturbances are small; the latter aims at achieving fast observing and accommodating of sudden and large faults. Thereafter, a switching logic is developed for the switch between these two adaptive SMDO modes to ensure that the fast gain-adaptation SMDO only works in the case that the uncertainties are large and fast-changing. Finally, the switched adaptive SMDO is integrated with an incremental terminal sliding mode controller, and are validated using simulation experiments based on the nonlinear F-16 model.https://ieeexplore.ieee.org/document/9464305/Adaptive observersliding mode disturbance observerfault accommodationincremental terminal sliding mode controlgain-adaptation law |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Baoxu Jia Liguo Sun Yanyang Wang Xiaoyu Liu Weigao Dang |
spellingShingle |
Baoxu Jia Liguo Sun Yanyang Wang Xiaoyu Liu Weigao Dang Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control IEEE Access Adaptive observer sliding mode disturbance observer fault accommodation incremental terminal sliding mode control gain-adaptation law |
author_facet |
Baoxu Jia Liguo Sun Yanyang Wang Xiaoyu Liu Weigao Dang |
author_sort |
Baoxu Jia |
title |
Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control |
title_short |
Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control |
title_full |
Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control |
title_fullStr |
Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control |
title_full_unstemmed |
Switched Adaptive Sliding Mode Disturbance Observer for Nonlinear Fault-Tolerant Flight Control |
title_sort |
switched adaptive sliding mode disturbance observer for nonlinear fault-tolerant flight control |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2021-01-01 |
description |
Typical fault scenarios such as actuator stuck, wingtip damage, and sudden center of gravity change usually bring great challenge to fault-tolerant flight control laws. In this paper, adaptive sliding mode disturbance observer (SMDO) is studied under the background of designing a fault-tolerant flight controller. This paper proposes a switched adaptive SMDO for observation of system uncertainties considering fault accommodation. It consists of two adaptive SMDOs: baseline gain-adaptation SMDO and fault-oriented gain-adaptation SMDO. The former is designed for observing slow-changing uncertainties, and can guarantee that the observer gains are small when disturbances are small; the latter aims at achieving fast observing and accommodating of sudden and large faults. Thereafter, a switching logic is developed for the switch between these two adaptive SMDO modes to ensure that the fast gain-adaptation SMDO only works in the case that the uncertainties are large and fast-changing. Finally, the switched adaptive SMDO is integrated with an incremental terminal sliding mode controller, and are validated using simulation experiments based on the nonlinear F-16 model. |
topic |
Adaptive observer sliding mode disturbance observer fault accommodation incremental terminal sliding mode control gain-adaptation law |
url |
https://ieeexplore.ieee.org/document/9464305/ |
work_keys_str_mv |
AT baoxujia switchedadaptiveslidingmodedisturbanceobserverfornonlinearfaulttolerantflightcontrol AT liguosun switchedadaptiveslidingmodedisturbanceobserverfornonlinearfaulttolerantflightcontrol AT yanyangwang switchedadaptiveslidingmodedisturbanceobserverfornonlinearfaulttolerantflightcontrol AT xiaoyuliu switchedadaptiveslidingmodedisturbanceobserverfornonlinearfaulttolerantflightcontrol AT weigaodang switchedadaptiveslidingmodedisturbanceobserverfornonlinearfaulttolerantflightcontrol |
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1721345637582110720 |