An Adaptive Controller based on Output Error Estimation Method

Abstract This paper presents a robust adaptive control algorithm for linear timeinvariant systems based on an output error estimation method. The parameterization adopted renders the output error linear in the parameters and no positive real condition is needed . The convergence of t he algorithm is investigated and the input-output stability of the controlled system in the presence of unmodelled dynamics and of disturbances, is established. Simulation results are also presented comparing the performance of the proposed algorithm with that of an adaptive controller with the same control law but based on an equation error estimation method