Robust passivity-based surge control of compressors via feedback linearization

In this work, we address the stability of compression systems and the active control of surge. Despite considerable efforts to stabilize axial compressors at efficient operating points, preventing surge is still a challenging problem. Here, the two-state Moore-Greitzer model comprising close-coupled valve and including parameter uncertainties and external disturbances, is considered. A feedback linearization approach transforms the original nonlinear model into an equivalent linear system. A passivity-based control is then suggested to robustly stabilize the linearized system in the presence of external disturbances and model uncertainties. Time-domain simulations strongly corroborate analytical developments and demonstrate the robust performance of the controller.