Robust Cascade Control of Electric Motor Drives Using Dual Reduced-Order PI Observer

摘要: This paper addresses the problem of preserving nominal performance a conventional cascade controller for electric motor drives in presence parameter uncertainties and external disturbances. Practical reduced-order proportional-integral (PI) observers are incorporated with predesigned PI controllers order to enhance robust current speed controllers. A unified analysis based on singular perturbation theory is presented confirm desired approximation augmented system closed-loop system. The validity proposed dual observer-based control scheme tested via computer simulations experiments using dc Both results verify that can be used effectively recover drives.