불확실성을 고려한 횡축형 자기 베어링 시스템의 로버스트 제어에 관한 연구

A Study of Robust Control of Horizontal-Shaft Magnetic Bearing System considering Perturbation

Recently, the magnetic bearings which have many advantages such as no noise, less mechanical friction are widely applied to the suspension of rotors on the rotary machineries. However, the magnetic bearing system is inherently unstable, nonlinear and MIMO(multi-input-multi-output) system as well. In this paper, we design the state feedback gain using linear matrix inequality(LMI) to the multi-objective synthesis, in the magnetic bearing system with integral type servo system. The design objectives include H∞ performance, asymptotic disturbance rejection, time-domain constraints, on the closed-loop pole location. The results of computer simulation show the validity of the designed controller.