Method and system for detecting precursors to compressor stall and surge
AssigneeGeneral Electric Company
InventorsPierino Bonanni, Narayanan Venkateswaran, Sanjay Bharadwaj
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Abstract
A method and system for detecting precursors to compressor stall and surge in which at least one compressor parameter is monitored to obtain raw data representative of said at least one compressor parameter. The raw data is pre-processed using a frequency demodulator to produce pre-processed data, and the pre-processed raw data is post-processed using a Kalman filter to obtain stall precursors.
Claims28
A method for detecting precursors to compressor stall/surge, the method comprising:
- monitoring at least one compressor parameter to obtain raw data representative of said at least one compressor parameter;
- pre-processing said raw data using a frequency demodulator to produce pre-processed data comprising at least one demodulated signal having an amplitude corresponding to the instantaneous frequency of a locally dominant component of an input signal;
- post-processing said pre-processed data using a Kalman filter to obtain stall precursors.
A method for detecting precursors to compressor stall/surge, the method comprising:
- monitoring at least one compressor parameter to obtain raw data representative of said at least one compressor parameter, wherein said monitoring comprises sampling and digitizing signals representing said at least one compressor parameter to obtain time-series analyzed data;
- pre-processing said raw data using a frequency demodulator to produce pre-processed data, said pre-processing being at least partially performed in the digital domain;
- post-processing said pre-processed data using a Kalman filter to obtain stall precursors.
A method for detecting precursors to compressor stall/surge, the method comprising:
- monitoring at least one compressor parameter to obtain raw data representative of said at least one compressor parameter;
- pre-processing said raw data using a frequency demodulator to produce pre-processed data, said preprocessing being performed at least partially in the analog domain, wherein said pre-processing comprises producing a demodulated signal having an amplitude corresponding to the instantaneous frequency of a locally dominant component of an input signal;
- and
- post-processing said pre-processed data using a Kalman filter to obtain stall precursors.
A system for detecting precursors to compressor stall/surge comprising:
- at least one sensor positioned at said compressor to monitor at least one compressor parameter, said at least one sensor outputting raw data representative of said at least one compressor parameter;
- a frequency demodulator receiving said raw data, demodulating said raw data, and producing demodulated data;
- a Kalman filter obtaining stall precursors from said demodulated data;
- and
- a calibration system for sampling and digitizing output from said at least one sensor to obtain time-series analyzed raw data, said frequency demodulator receiving said time-series analyzed raw data.
A system for detecting precursors to compressor stall/surge comprising:
- at least one sensor positioned at said compressor to monitor at least one compressor parameter, said at least one sensor outputting raw data representative of said at least one compressor parameter;
- a frequency demodulator receiving said raw data, demodulating said raw data, and producing demodulated data;
- a Kalman filter obtaining stall precursors from said demodulated data;
- and
- a stall precursor measure system computing a standard deviation of innovations of said Kalman filter to determine a stall precursor signal.
Dependencies are inferred from the claim text.