Abstract
In this paper, output-based event-triggered tracking control for a networked pneumatic muscle actuators system with packet disorders is investigated. An output-based event-triggered strategy is adopted to avoid the transmission of abundantly redundant data and alleviate the network congestion. Meanwhile, packet disorders frequently occur in the data transmission process in the network environment, which will damage the tracking performance of the networked pneumatic muscle actuator system. A packet reordering method is proposed to deal with the packet disorders and to select the latest control voltage signal, considering the control voltage signal update period is variable under the output-based event-triggered strategy. Besides, an active disturbance rejection controller is designed to observe and compensate the lumped disturbance composed of the nonlinear flow characteristics of the pressure proportional valves and the disturbance caused by the mechanical mechanism. Then a sufficient condition is given to ensure input-to-state stability of the closed-loop system. Finally, extensive experiments are carried out to verify the applicability of the proposed packet reordering method and the tracking performance of the system.
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Acknowledgements
The authors would like to thank the anonymous reviewers for their detailed comments that helped to improve the quality of the paper.
Funding
The work was supported by the National Natural Science Foundation of China (61773334, 62073238), the Natural Science Foundation of Hebei Provincial (F2020203079, F2022208007), and the Key projects of Natural Science Foundation of Hebei Province (F2021203054).
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Li, L., Cao, Y. & Zhao, L. Output-based event-triggered tracking control for networked pneumatic muscle actuators system with packet disorders. Nonlinear Dyn 111, 6363–6378 (2023). https://doi.org/10.1007/s11071-022-08143-6
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DOI: https://doi.org/10.1007/s11071-022-08143-6