Rejection and Attenuation of Multiple Disturbances for a Class of Uncertain Systems

A novel anti-disturbance strategy for a class of uncertain systems is investigated. Besides the unknown frequency sinusoidal, controlled plant subjected to bounded noise and nonlinear term simultaneously. Through construction auxiliary observer, sinusoidal represented in parametric uncertainty form. Only one scalar needs estimating construct compensation signal, meanwhile unwanted operation between equivalent disturbance can be removed. By integrating feedback control law, all unexpected dynamics rejected attenuated respectively, where conditions on stability optimal performance are also provided. Finally, computer simulation example presented illustrate effectiveness applicability suggested method.