Szukana fraza: [Abstract = "This paper concerns the problem of designing an EID\-based robust output\-feedback modified repetitive\-control system \(ROFMRCS\) that provides satisfactory aperiodic\-disturbance rejection performance for a class of plants with time\-varying structured uncertainties. An equivalent\-input\-disturbance \(EID\) estimator is added to the ROFMRCS that estimates the influences of all types of disturbances and compensates them."]