Patent attributes
In a control system for a gas turbine engine that uses the outlet pressure of the turbine as an importation control parameter, when the high pressure sensor for detecting the outlet pressure of the turbine is found to be faulty, it is determined if an estimated value of the outlet pressure of the compressor is normal or not, and substitute the output value of the high pressure sensor with the estimated value if the estimated value is normal and with the inlet pressure of the fan or a value proportional thereto if the estimated value is not normal. Thereby, the control system is given with such a substitute value for the output of the high pressure sensor in case of a failure of the high pressure sensor that would prevent any abrupt changes in the behavior of the engine and allow the engine to be operated in a stable manner.
