View source for Nonlinear Control Design for Rotating Stall and Surge with Magnetic Bearing Actuators

{{HTDB paper
| authors = Yong Wang, James D. Paduano and Richard M. Murray
| title = Nonlinear Control Design for Rotating Stall and Surge with Magnetic Bearing Actuators
| source = 1999 Conference on Control Applications
| year = 1999
| type = Conference Paper
| funding = AFOSR
| url = http://www.cds.caltech.edu/~murray/preprints/wpm99-cca.pdf
| abstract = Rotating stall and surge are aerodynamic instabilities that limit the performance of
aeroengines. A set of magnetic bearings supporting the compressor rotor is a potential
actuator for active control of rotating stall and surge. Based on a first-principles model
we show that using this type of actuation, the first harmonic mode of rotating stall is
linearly controllable, but the second harmonic mode and the surge mode are linearly
uncontrollable. We then give an explicit procedure for designing feedback laws such that
the first mode is linearly stabilized and the criticality of the Hopf bifurcations of the
second mode and the surge mode are supercritical. We also investigate the effects of
magnitude saturation on the regions of attraction. We demonstrate the theoretical results
by numerical simulations of a model for a transonic compressor at the NASA Lewis Research
Center. 
| flags = 
| tag = wpm99-cca
| id = 1999a
}}