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In this paper, we consider a cyber-physical architecture where control applications are divided into multiple tasks, spatially distributed over various processing units that communicate via a shared bus. While control signals are exchanged over the communication bus, they have to wait for bus access and therefore experience a delay. We propose certain (co-)design guidelines for (i) the communication schedule, and (ii) the controller, such that stability of the control applications is guaranteed for more flexible communication delay constraints than what has been studied before. We illustrate the applicability of our design approach using the FlexRay dynamic segment as the communication medium for the processing units.
Date of Conference: 25-28 Jan. 2011