Co-Design of Arbitrated Network Control Systems with Overrun Strategies
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This paper addresses co-design of platform and
control of multiple control applications in a network control
system. Limited and shared resources among control and noncontrol
applications introduce delays in transmitted messages.
These delays in turn can degrade system performance and cause
instabilities. In this paper, we propose an overrun framework
together with a co-design to achieve both optimal control performance
and efficient resource utilization. The starting point for
this framework is an Arbitrated Network Control System (ANCS)
approach, where flexibility and transparency in the network are
utilized to arbitrate control messages. Using a two-parameter
model for delays experienced by control messages that classifies
them as nominal, medium, and large, we propose a controller
that switches between nominal, skip and abort strategies. An
automata-theoretic technique is introduced to derive analytical
bounds on the abort and skip rates. A co-design algorithm is
proposed to optimize the selection of the overrun parameters. A
case study is presented that demonstrates the ANCS approach,
the overrun framework and the overall co-design.
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Tác giả
Soudbakhsh, Damoon
Phan, Linh
Annaswamy, Anuradha
Sokolsky, Oleg
