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In this paper, the H ∞ fault estimation (FE) problem is investigated for a class of wireless networked control systems (W-NCSs), where an information scheduler is embedded in. Based on time-division multiple access mechanism, the scheduler is modeled by periodic state-space equations, which can order the information medium access time without collision. The integration approach of the W-NCSs and scheduler is very suitable for the application of W-NCSs on industrial automatic control, since the communication is described as deterministic behavior by scheduler, and consequently the high real-time performance can be essentially guaranteed. Based on the integrated model, the FE algorithm is proposed in terms of solution to a set of Riccati difference equations. Compared with the general state-space model of this algorithm, it is worth mentioning that the solution is developed into solving the model with arbitrary inputs. Then, the performance of fault estimator is verified on a physical experimental platform WiNC integrated with three-tank system, which is formulated into discrete periodic system by multirate sampling. Finally, the effectiveness of the FE algorithm developed in this paper is demonstrated.
Wang et al. (Fri,) studied this question.