| Title | 
	A Study On the Design of Q-filter in Disturbance Observer Controller for Electro-Magnetic Levitation System with Mass Uncertainty  | 
					
	| DOI | 
	http://dx.doi.org/10.5207/JIEIE.2016.30.10.061 | 
					
	| Keywords | 
	 Electro-Magnetic Suspension System ; Disturbance Observer ; Model Uncertainties ; Noise Suppression | 
					
	| Abstract | 
	The disturbance observer (DOB) controller has been very popular since it has provided robust stability and disturbance rejection. In this paper, we propose a new Q-filter in DOB controller for Electro-Magnetic suspension (EMS) systems. While the standard  |