Abstract
In this paper, we consider a cyber-physical architecture where multiple control applications are divided into multiple tasks, spatially distributed over various processing units that communicate over a bus implementing a hybrid communication protocol, i.e., a protocol with both time-triggered and event-triggered communication schedules (e.g., FlexRay). In spite of efficient utilization of communication bandwidth (BW), event-triggered protocols suffer from unpredictable temporal behavior, which is exactly the opposite in the case of their time-triggered counterparts. In the context of communication delays experienced by the control-related messages exchanged over the shared communication bus, we observe that a distributed control application is more prone to performance deterioration in transient phases compared to in the steady-state. We exploit this observation to re-engineer control applications to operate in two modes, in order to optimally exploit the bi-modal (time- and event-triggered) characteristics of the underlying communication medium. Depending on the state (transient or steady) of the system, both, the control inputs and the communication schedule are now switched. Using a FlexRay-based case study, we show that such a design provides a good trade-off between control performance and bus utilization.
Original language | English |
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Title of host publication | 2011 Design, Automation & Test in Europe |
Place of Publication | Piscataway |
Publisher | Institute of Electrical and Electronics Engineers |
Pages | 914-919 |
Number of pages | 6 |
ISBN (Electronic) | 978-3-9810801-8-6 |
ISBN (Print) | 978-1-61284-208-0 |
DOIs | |
Publication status | Published - 2011 |
Externally published | Yes |
Event | 14th Design, Automation and Test in Europe Conference and Exhibition (DATE 2011) - Alpexpo Espace Alpes Congres, Grenoble, France Duration: 14 Mar 2011 → 18 Mar 2011 Conference number: 14 https://www.date-conference.com/date11/ |
Conference
Conference | 14th Design, Automation and Test in Europe Conference and Exhibition (DATE 2011) |
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Abbreviated title | DATE 2011 |
Country | France |
City | Grenoble |
Period | 14/03/11 → 18/03/11 |
Internet address |