Informative conditions for a data set in an MIMO networked control system

In system identification, the informative property of a data set is a necessary condition for yielding a unique global minimum of the identification criterion asymptotically or guaranteeing the parameter estimator to be consistent. In this paper, by considering possible network-induced delays and packet dropouts in either or both of the sensor-to-controller link and the controller-to-actuator link, we present a group of flexible conditions on the network transmission and the controller to guarantee that the data set of a multiple-input multiple-output (MIMO) networked control system with no external excitation in the closed-loop is informative. These conditions offer adjustable trade-off between the requirements on the network transmission and the controller by tuning a free parameter. Simulation studies are given to validate the theoretical results.