Nonlinear robust disturbance rejection controllers for rotating stall and surge in axial flow compressors

We develop globally stabilizing robust/disturbance rejection controllers for rotating stall and surge in axial flow compressors with uncertain compressor performance pressure flow characteristic maps. Specifically, using the nonlinear nonquadratic disturbance rejection optimal control framework for systems with bounded energy (square integrable) L ₂ disturbances (W.M. Haddad et al., 1997) and the nonlinear nonquadratic robust optimal control framework for systems with nonlinear parametric uncertainty, a family of globally robustly stabilizing controllers for jet engine compression systems is developed. The proposed controllers are compared with the locally stabilizing bifurcation based controllers of R.A. Adomaitis and E.H. Abed (1992) and the recursive backstepping controllers of M. Krstic et al. (1995).