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Title: Adaptive fixed-time trajectory tracking control of a stratospheric airship
Authors: Zheng, Zewei
Feroskhan, Mir
Sun, Liang
Keywords: Adaptive Control
Fixed-time Control
DRNTU::Engineering::Aeronautical engineering
Issue Date: 2018
Source: Zheng, Z., Feroskhan, M., & Sun, L. (2018). Adaptive fixed-time trajectory tracking control of a stratospheric airship. ISA Transactions, 76, 134-144. doi:10.1016/j.isatra.2018.03.016
Series/Report no.: ISA Transactions
Abstract: This paper addresses the fixed-time trajectory tracking control problem of a stratospheric airship. By extending the method of adding a power integrator to a novel adaptive fixed-time control method, the convergence of a stratospheric airship to its reference trajectory is guaranteed to be achieved within a fixed time. The control algorithm is firstly formulated without the consideration of external disturbances to establish the stability of the closed-loop system in fixed-time and demonstrate that the convergence time of the airship is essentially independent of its initial conditions. Subsequently, a smooth adaptive law is incorporated into the proposed fixed-time control framework to provide the system with robustness to external disturbances. Theoretical analyses demonstrate that under the adaptive fixed-time controller, the tracking errors will converge towards a residual set in fixed-time. The results of a comparative simulation study with other recent methods illustrate the remarkable performance and superiority of the proposed control method.
ISSN: 0019-0578
DOI: 10.1016/j.isatra.2018.03.016
Rights: © 2018 ISA. All rights reserved. This paper was published by Elsevier Ltd in ISA Transactions and is made available with permission of ISA.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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