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Abstract:
This paper proposes a distributed fixed-time fault-tolerant control methodology for networked six-degree-of-freedom fixed-wing UAVs whose models are subjected to actuator faults and saturation. Two fixed-time anti-saturation control strategies were developed for velocity and attitude channels. Notably, the adverse effects of actuator faults (e.g., lock-in-place, and loss of effectiveness) and actuator saturation could be effectively compensated for by means of a new adaptive-gain-based design. This feature differs significantly from most existing fault-tolerant control schemes. A fixed-time-based sliding mode surface was delicately embedded in the control design in order to provide the attitude channel with the fixed-time tracking property. Model uncertainties and external disturbances could be effectively handled by using a bound estimation method and smooth functions. On the basis of Lyapunov stability theory, the closed-loop system is shown to be stable in the sense of the fixed-time concept. Actuator saturations were rigorously enforced, and the tracking errors of velocity and attitude converged to a residual set around the origin within a fixed time in spite of model uncertainties, external disturbances, and actuator faults. Numerical examples were carried out to validate the effectiveness of the theoretical findings. IEEE
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IEEE Transactions on Aerospace and Electronic Systems
ISSN: 0018-9251
Year: 2023
Issue: 6
Volume: 59
Page: 1-13
4 . 4 0 0
JCR@2022
ESI Discipline: ENGINEERING;
ESI HC Threshold:19
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count: 42
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 8
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