Patent ID: 6536284
Filing Date: 2003-03-25
Classification: F04D

Abstract:
A method for monitoring and controlling a compressor, comprising:(a) monitoring at least one compressor parameter; (b) analyzing the monitored parameter to obtain time-series data; (c) filtering the time-series analyzed data using a band-pass filter centered on a particular frequency of interest; (d) frequency demodulating the filtered time-series data to produce an output signal, and processing the output signal to determine stall precursors, the frequency demodulation using a reference frequency that is the same as the center frequency of interest; (e) comparing the stall precursors with predetermined baseline values to identify compressor degradation; (f) performing corrective actions to mitigate compressor degradation to maintain a preselected level of compressor operability; and (g) iterating said corrective action performing step until the pre-selected level of compressor operability is met, whereby the monitored compressor parameter lies within predetermined threshold.