A turbine monitoring temperature analytic method was proposed for fault tolerance of high-bypass-ratio engine

so as to prevent engine control from degrading caused by turbine monitoring temperature sensor failure or overtemperature caused by undetected sensor failure. The analytic method includes two parts: one analytic method is based on turbine total exhaust temperature which is a main analytic unit; the other is based on air flow model as a redundant unit

which is used when the main analytic temperature differs a lot from the measurement temperature. An experiment on engine trial data was carried out. The results show that the main analytic unit's steady state error is less than 0.33%. The redundant unit's steady state error is less than 0.8%. Experiment results show these two analytic units are both valid and suitable for engine fault tolerant control.