On sensor faults estimation using sliding mode observers

This paper discusses the problem of designing the sliding-mode-based sensor faults estimation in a general structure suitable on the actuator as well as sensor faults detection and estimation. The problem addressed is indicated as an unified algebraic approach giving sufficient conditions of solution. Lyapunov inequality implying from two linear matrix inequalities are outlined to posses a stabile solution for the modified optimal estimator parameters in the standard estimator structure. An example is presented to explain the procedures for the execution of a sensor fault estimation and to illustrate the properties of the proposed design method in the continuous time system.