In this study, the event-triggered problem of networked control systems (NCSs) is investigated, and a novel information transmission scheme is established. Under this scheme, the segment-weighted information (SWI) in a sliding historical window (SHW) is calculated and then sampled. Compared with the traditional direct sampling method, in this approach, the control input includes historical information in the SHW, thereby leading to less information loss due to sampling. This study also emphasizes on designing an SWI-based event-triggered mechanism (ETM) for scheduling network transmission. Different from most of the existing ETMs, the proposed SWI-based ETM leverages historical information to determine which data are necessary for the whole control system. Our approach can greatly reduce the number of unexpected triggering events of a control system with stochastic disturbances owing to the introduction of the SWI in the ETM. Moreover, Zeno phenomena are prevented thanks to periodic sampling. Sufficient conditions are derived based on the Lyapunov functional approach, and a numerical simulation example is provided to demonstrate the effectiveness of the proposed method.
Bibliographical noteFunding Information:
This work was supported in part by the National Natural Science Foundation of China under Grant 62273183, Grant 62022044, and Grant 62103193, and in part by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (Ministry of Science and ICT) under Grant NRF- 2020R1A2C1005449.
© 2013 IEEE.
- Event-triggered mechanism (ETM)
- networked control system (NCS)
- segment-weighted information (SWI)
- sliding historical window (SHW)
ASJC Scopus subject areas
- Information Systems
- Human-Computer Interaction
- Electrical and Electronic Engineering
- Control and Systems Engineering
- Computer Science Applications