Patent ID: 6582183
Filing Date: 2003-06-24
Classification: F04D,F05D

Abstract:
A system for reducing flutter instability in a rotary compressor having a plurality of blades comprising:a plurality of sensors for sensing vibrations resulting from deformation movement of the blade and generating a flutter signal that is a function of the vibrations; a signal conditioning circuit, coupled to each of the sensors for receiving the flutter signals and processing the flutter signals to produce a composite signal that is a function of the flutter signals; a computation circuit, coupled to the signal conditioning circuit, for receiving the composite signal and generating an amplitude signal that is a function of the composite signal; a flutter control circuit, coupled to the computation circuit, for receiving the amplitude signal and generating a control signal that is a function of the amplitude signal; an actuator, coupled to the flutter control circuit, for receiving the control signal and responding to the control signal by modulating an annulus averaged flow through the compressor thereby reducing flutter characteristics on the plurality of blades.