STATE FEEDBACK COMPENSATION FOR REF" SERVO SYSTEM OF DC-DC CONVERTER

A simple design procedure is proposed for a stabilizing compensator of repetitive digital servo system of DC-DC converter which follows exactly a periodic reference and eliminates sufficiently the effects of both synchronous and asynchronous disturbances by repeating control operation. Assigning all poles of the plant designed as a discrete time system at zero and connecting a reverse system of the plant between a repetitive controller and the plant, finite time settling control is carried out. Control errors caused by a disturbance or an inaccurate measurement of the plant parameters can be decreased enough after the first period of repetitive control operation. Moreover, control error due to the parameter variation of the plant can also be rapidly suppressed.