Observer-based scheme for robust fault estimation of a class of nonlinear discrete systems

摘要

In this paper, we investigate the problem of robust fault estimation for a class of nonlinear discrete-time Lipschitz systems. A new fault estimation strategy is proposed based on the unknown input observer frameworks and the prescribed robust disturbance attenuation level is achieved to guarantee the convergence of the estimation error systems. Sufficient conditions for the existence of robust fault estimation observer is derived in terms of linear matrix inequalities (LMIs), which can be solved using the convex optimization techniques. Finally, a numerical example is given to demonstrate the effectiveness of the proposed approach.