자기베어링을 이용한 터보 차져 서지 압력 측정 궤환 제어

Although the mass flow measurement is theoretically the best choice for compressor instability control, proportional controls of the pressure measurement were widely used for practical reason. This paper presents a pressure measurement feedback control of the compressor surge using tip clearance actuation of a magnetic bearing actuator. First, we derive a mathematical model of tip clearance effect on the compressor pressure rise. Then, we simulate stabilizing mass flow measurement and state feedback controls. Then, an extended Kalman filter is designed to estimate the mass flow through measuring the compressor pressure, and finally, the output feedback control is designed through combining the feedback control and the EKF. Several simulations were performed based on the compressor data from a commercial turbocharger.