A Robust Control of Horizontal-Shaft Magnetic Bearing System Using Linear Matrix Inequality Technique

선형행렬부등식 기법을 이용한 횡축형 자기 베어링 시스템의 로버스트 제어

Magnetic bearing system is frequently used for high-speed rotating machines because of its frictionless property. But the magnetic bearing system needs feedback controller for stabilization. This paper presents a robust controller design by using linear matrix inequality for magnetic bearing system which shows the control performance and robust stability under the physical parameter perturbations. To the end, the validity of the designed controller is investigated through computer simulation.