Identification of linear dynamic systems operating in a networked environment. (English) Zbl 1192.93123

Wang, Jiandong; Zheng, Wei Xing; Chen, Tongwen

Automatica 45, No. 12, 2763-2772 (2009).

Summary: This paper studies a networked system identification problem, which aims at identifying mathematical models required in networked control/estimation/filtering systems. Specifically, we consider the off-line identification of open-loop stable linear time-invariant processes working in a networked environment. In the networked environment, how the actuators (D/A conversion) operate plays a key role in the complexity of the related identification problems. In particular, it is reasonable to consider the configuration of event-driven actuators subject to random network-induced delays and packet dropouts; as a result, the networked identification problem is formulated as the one to identify continuous-time linear time-invariant models, based on the general non-uniformly non-synchronized sampled data. A modified version of the simplified refined instrumental variable method is proposed to solve this problem, and is validated in a networked identification experiment based on the MATLAB/SIMULINK simulator TrueTime.

MSC:

93E12	Identification in stochastic control theory
93E10	Estimation and detection in stochastic control theory
93E11	Filtering in stochastic control theory
93A15	Large-scale systems

Keywords:

system identification; networked control systems; non-synchronized non-uniformly sampled data

Software:

CONTSID; TrueTime; Matlab

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