Title :
Adaptive detection of instabilities and nonlinear analysis of a reduced-order model for flutter and rotating stall in turbomachinery
Author :
Copeland, G. Scott ; Kevrekidis, Ioannis G. ; Rico-Martínez, Ramiro
Author_Institution :
United Technol. Res. Center, East Hartford, CT, USA
Abstract :
In this study system parameters are adaptively varied to identify bifurcations from equilibrium in simulations of a reduced-order model for turbomachinery aeromechanics. An element of the adaptive process is identification of a low-order locally nonlinear discrete-time map from the observers. The nonlinear behavior of the system in the neighborhood of the bifurcation is then estimated from the identified system
Keywords :
adaptive control; aerodynamics; bifurcation; gas turbines; mechanical stability; nonlinear systems; observers; reduced order systems; adaptive control; aeromechanics; bifurcation; flutter; identification; instability; nonlinear discrete-time map; nonlinear systems; observers; reduced-order model; rotating stall; turbine engines; turbomachinery; Actuators; Aerodynamics; Bifurcation; Blades; Ducts; Engines; Reduced order systems; Stability; Turbines; Turbomachinery;
Conference_Titel :
Control Applications, 1999. Proceedings of the 1999 IEEE International Conference on
Conference_Location :
Kohala Coast, HI
Print_ISBN :
0-7803-5446-X
DOI :
10.1109/CCA.1999.801134
