METHOD FOR CANCELING THE DYNAMIC RESPONSE OF A MASS FLOW SENSOR USING A CONDITIONED REFERENCE

The present invention provides a gas turbine engine surge control system comprising a pressure transducer positioned for sensing compressor discharge pressure, a hot wire anemometer positioned for sensing compressor discharge flow and temperature, means for electronically processing the signals from the sensors to obtain corrected compressor discharge flow without the use of look-up tables, and means for modulating a surge control valve based on corrected flow to prevent surge. The means for electronically processing said sensed signals incorporates means for canceling the dynamic response of the hot wire anemometer so as to have the effect of accelerating the response rate of the anemometer to match the response rate of the discharge pressure transducer.