Recently, supervision of networked control systems receives more and more attention in the field of automatic control. Considering that the bus system integrated in the networked control system may strongly influence the overall system behavior, modeling of the networked control systems is first studied in this paper, in which the unknown and statistically varying transmission delays are modeled as model uncertainties. Based on this model, two observer-based approaches to the estimation of state variables and unknown inputs are developed. The application of these approaches is finally illustrated by an example.
Print ISSN: 0178-2312
Volume: 52, 08/2004
Pages: 377 - 387