4th International ICST Conference on Wireless Internet

Research Article

Event-triggered strategies for industrial control over wireless networks

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  • @INPROCEEDINGS{10.4108/ICST.WICON2008.4996,
        author={Maben Rabi and Karl H. Johansson},
        title={Event-triggered strategies for industrial control over wireless networks },
        proceedings={4th International ICST Conference on Wireless Internet},
        publisher={ICST},
        proceedings_a={WICON},
        year={2010},
        month={5},
        keywords={},
        doi={10.4108/ICST.WICON2008.4996}
    }
    
  • Maben Rabi
    Karl H. Johansson
    Year: 2010
    Event-triggered strategies for industrial control over wireless networks
    WICON
    ICST
    DOI: 10.4108/ICST.WICON2008.4996
Maben Rabi1,*, Karl H. Johansson1,*
  • 1: ACCESS Linnaeus Centre, School of Electrical Engineering, Royal Institute of Technology, 100 44 Stockholm, Sweden.
*Contact email: maben.rabi@ee.kth.se, karl.henrik.johansson@ee.kth.se

Abstract

New event-based sampling strategies can support the efficient use of radio resources in wireless control systems. Motivated by the recent introduction of wireless network nodes in process control industry, we consider the particular demands these closed-loop systems set on the wireless communication and the influence the communication has on the control performance. In the paper, it is pointed out that by letting sensor nodes transmit only when needed, it is possible to minimize the communication bandwidth utilization in these systems. We show how classical control strategies commonly based on periodic sampling, such as proportional-integralderivative control and minimum variance control, can be cast in an event-based setting in which decentralized communication decisions are taken suitable for commonly used contention-based medium access control protocols. Eventtriggered sampling for estimation is also reviewed. Simulated examples illustrate the results.