Fuzzy Adaptive Prescribed Performance Fault-Tolerant Control for HFVs with Fixed-Time Convergence Guarantee

A new fixed-time fuzzy adaptive fault-tolerant control methodology is proposed for the longitudinal dynamics of hypersonic flight vehicles (HFVs) in the presence of actuator faults, uncertain dynamics, and external disturbances. In contrast with the conventional fixed-time control schemes that typic...

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Bibliographic Details
Published in:International journal of aerospace engineering 2022-09, Vol.2022, p.1-17
Main Authors: Dong, Zehong, Li, Yinghui, Lv, Maolong, Zhao, Zilong, Pei, Binbin
Format: Article
Language:English
Subjects:
Actuators
Adaptive control
Aerospace engineering
Altitude
Control methods
Controllers
Decomposition
Fault tolerance
Flight vehicles
Fuzzy control
Fuzzy logic
Fuzzy systems
Hypersonic flight
Initial conditions
Stability
Tracking errors
Velocity
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Summary:A new fixed-time fuzzy adaptive fault-tolerant control methodology is proposed for the longitudinal dynamics of hypersonic flight vehicles (HFVs) in the presence of actuator faults, uncertain dynamics, and external disturbances. In contrast with the conventional fixed-time control schemes that typically contain the fractional powers of errors in their designs, this work develops a low-complexity control structure in the sense of removing the dependence on the need of abovementioned fractional power terms by means of prescribed performance control (PPC) method. Different from the most existing PPC approaches where the initial conditions of tracking errors are required to be known, the newly proposed prescribed performance function (PPF) can relax such restrictions through choosing properly small initial values of PPF. Fuzzy logic systems (FLSs) are employed to handle unknown dynamics, and minimal learning parameter (MLP) technique is incorporated into the design for the purpose of alleviating computation burden. Closed-loop stability is rigorously proved via Lyapunov stability theory, and simulation results are eventually given to validate the effectiveness of the proposed control strategy.
ISSN:1687-5966
1687-5974
DOI:10.1155/2022/2438657