MULTIRATE CONTROL FOR AN ICCS ENVIRONMENT. PART II: THE TIME SKEW PROBLEM

TitleMULTIRATE CONTROL FOR AN ICCS ENVIRONMENT. PART II: THE TIME SKEW PROBLEM
Publication TypeConference Paper
Year of Publication2000
AuthorsSalt J, Casanova V
Conference NameProceedings of the 2nd IFAC Workshop on Linear Time Delay Systems (LTDS2000), pp. 252-257. Ancona (Italy).
ISBN Number0-080-43623-4
KeywordsBus systems, Communication networks, Delay compensation, Fieldbus, Multirate, random media, Sampled-data control
Abstract

In an ICCS (Integrated Communication and Control System) as described in
the part I of this paper, the controller-plant communication is made through a shared
medium. As there is not an exclusive link, it is difficult to guarantee the synchronisation
of sensor, controller and actuator. The time skew between the sample, control and
application instants in combination with the random access delay causes a loss of
information that can unstable the system. This second part proposes a solution, using the
multirate controller, to adjust the system behaviour to the desired reference model in the
presence of the time skew.
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