Nonlinear adaptive observer design for an electromechanical rotative plant

This paper deals with the design of an adaptive observer that can estimate both the states and the parameters of a class of nonlinear systems. The purpose of the proposed method is to eliminate the restrictive dissipativity condition from the stability proof that is present in many previous works presented in the literature. The observer gain calculus is cast as a linear matrix inequality (LMI) feasibility problem. We aim to apply the proposed algorithm to estimate the unknown parameters of a second order electromechanical rotary model. The appeal of this proven theoretical design is further demonstrated numerically with a comparative design.