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자기부상시스템의 외란관측기 제어기에 Q 필터가 미치는 영향에 관한 연구
전찬영(Chanyoung Jeon),장소현(Sohyun Jang),조남훈(Nam-Hoon Jo) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.10
The disturbance observer (DOB) controller has been widely used in various industrial applications since it is capable of achieving robust stability and disturbance rejection. In this paper, we study the effect of Q-filter on disturbance observer controller for Electro-Magnetic suspension (EMS) systems. We consider three Q-filters and analyze their effects on the robust stability against parameter uncertainties due to mass variation. Moreover, we investigate the influence of sensor noise for three Q-filters. According to our study, robust stability improves as the order of Q-filter decreases. On the other hand, the larger the order of Q-filter, the more the effect of sensor noise can be removed.