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Updated: May 23, 2025

Optimization, Test and Diagnostics of Miniaturized Hall Thrusters
Published on: February 16, 2019
Event triggered prescribed time trajectory tracking control for unmanned surface vessels with lumped disturbances and
Bowen Sui1,2, Jianqiang Zhang3, Zhong Liu3
1School of Electronic and Electrical Engineering, Shangqiu Normal University, Shangqiu, 476000, China. d21382601@nue.edu.cn.
Abstract:
This article proposes a prescribed-time trajectory tracking control algorithm for unmanned surface vessels with lumped disturbances, limited communication, and error constraints, utilizing an event-triggered mechanism. Firstly, we present a prescribed-time lumped disturbances observer to accurately estimate the lumped disturbances, including external ocean disturbances, model uncertainties, and unmodeled dynamics. Then, a prescribed-time prescribed performance function is implemented to achieve guaranteed steady-state performance within a predefined time. In addition, an event-triggered strategy is embedded into the presented prescribed-time control scheme to lessen the frequency of controller signal updates and conserve communication resources. A thorough stability analysis demonstrates that the proposed control scheme is prescribed-time stable, and Zeno behavior can be prevented. Finally, the efficacy and superiority of the designed control strategy are confirmed with numerical simulations.
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