Output-based Dynamic Event-triggered Control for Networked Control Systems with Delays and Packet Losses without Acknowledgements

Event-triggered control (ETC) has been proposed in the networked control systems (NCSs) literature to reduce the need of data transmissions, and the main focus has been on the design of ETC mechanisms with a guaranteed positive minimum of inter-event time (MIET) and hence avoiding Zeno phenomena. In...

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Bibliographic Details
Published in:IEEE transactions on automatic control 2023-12, Vol.68 (12), p.1-16
Main Authors: Zhu, Xun-Lin, Zhang, Xiuxiu, Wei, Jumei, Lin, Hai
Format: Article
Language:English
Subjects:
Control systems
Data transmission
Delays
Dependent variables
dynamic output-based control
Event triggered control
Indexes
Lower bounds
Lyapunov methods
Network control
Networked control systems
Packet loss
packet losses
Packet transmission
Robot sensing systems
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Summary:Event-triggered control (ETC) has been proposed in the networked control systems (NCSs) literature to reduce the need of data transmissions, and the main focus has been on the design of ETC mechanisms with a guaranteed positive minimum of inter-event time (MIET) and hence avoiding Zeno phenomena. In this paper, we propose a design of an aperiodic ETC mechanism for general nonlinear NCSs. In our setup, the communication network could introduce variable transmission delays, while data packets could get lost without acknowledgements. For this, we first introduce auxiliary variables dependent upon the transmission situations to capture the relationship between the number of successive packet dropouts, MIETs, transmission delays and the number of successful packets being transmitted. Meanwhile, by designing appropriate jump rules of these variables, the changing process of the network-induced errors can be tracked. Then, we present a novel output-based dynamic ETC strategy that can simultaneously guarantee a finite L_{p}-gain and a strictly positive lower bound despite the presence of packet losses and transmission delays. In particular, the mandatory limit of short delays can be avoided, and the transmission delays exceeding the positive MIETs are allowed. Finally, a numerical example is given to verify the correctness and effectiveness of the proposed control approach.
ISSN:0018-9286
1558-2523
DOI:10.1109/TAC.2023.3250030