J. Paduano et al., PARAMETER-IDENTIFICATION OF COMPRESSOR DYNAMICS DURING CLOSED-LOOP OPERATION, Journal of dynamic systems, measurement, and control, 115(4), 1993, pp. 694-703
A low-speed axial research compressor has been fitted with movable inl
et guide vanes to allow for feedback stabilization of rotating stall.
A model exists whose structure captures the input-output behavior, and
stabilization of rotating stall is possible using this model. Quantit
ative identification of the parameters in the rotating stall model req
uires the ability to identify MIMO dynamics, which may be unstable, du
ring closed loop operation. The 'instrumental variable' technique is p
resented as the basic approach to this problem. The necessary extensio
ns to the basic technique are discussed, and the resulting algorithm i
s applied. Experimental results are presented which verify that the me
thodology yields useful estimates.