Naslov
Decentralized Event-based Scheduling for Shared-Resource Networked Control Systems
(A Decentralized Event-based Scheduling Design for Shared-Resource Networked Control Systems)

Autori
Mamduhi, Mohammad Hossein ; Tolić, Domagoj ; Hirche, Sandra

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proc. of 2015 European Control Conference / - , 2015, 941-947

Skup
European Control Conference

Mjesto i datum
Linz, Austrija, 15.07.2015. - 17.07.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
communication networks ; stochastic systems ; network analysis and control

Sažetak
In this paper, we introduce a decentralized event-triggered scheduling scheme for multi-loop Networked Control Systems (NCSs) in which the individual control loops are coupled through a shared communication channel. The proposed scheduling design combines deterministic and probabilistic attributes to efficiently allocate the limited communication resource among the control loops in an event-based fashion. Based on the local error thresholds, each control loop locally determines whether to compete for the channel access. As a result, control loops with higher transmission priorities (i.e., higher local errors) are more likely to utilize the channel, which in turn leads to more efficient usage of the limited resource. Each eligible subsystem then attempts to transmit at times specified by local waiting times, which are randomly distributed and local-error dependent. In this manner, the probability of data collisions in the communication channel is reduced. If the channel capacity is reached at some time instants, data packets are dropped. We demonstrate stochastic stability of such NCSs in terms of Lyapunov Stability in Probability (LSP). The numerical results show that our approach improves resource utilization and reduces the networked-induced error variance in comparison with time-triggered, random access, and centralized scheduling policies.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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