Robust output feedback stabilization of axial flow compressors with uncertain compressor characteristics

In this paper we develop a semiglobal robust output feedback controller for rotating stall and surge in axial flow compressors with certain kind of compressor characteristic uncertainties. The controller is designed by combining the backstepping control and the extended state observer (ESO). It is proven that the maximum pressure rise equilibrium can be robustly stabilized in the sense that the trajectory of closed loop system can arbitrarily close to the equilibrium after a finite time. The feasibility and effectiveness of the proposed method are further illustrated by simulating an example of a axial flow compressor with an uncertain compressor characteristic.