Robust H∞ Filtering for Discrete-Time Systems with Nonlinear Uncertainties

In this paper, we consider the problem of robust H
_infin
filtering for discrete-time systems with normbounded nonlinear uncertainties. The class of uncertain systems is described by a state-space model with linear nominal parts and norm-bounded nonlinear uncertainties on both state and output measurements. We proposed a method of converting such type of nonlinear uncertain system to a linear uncertain system, and presented a methodology for designing a robust H
_infin
filter