Average life prediction for aero-engine fleet based on performance degradation data

The purpose of this paper is to describe an approach to reliability life prediction, applicable to the aero-engine fleet, operation under dynamic conditions. The fleet performance reliability model based on Weibull distribution is established through measuring and recording the extent of deviation and degradation from a normal operating condition of aero engine fleet. The average life and performance reliability control method of the aero engine fleet are obtained under dynamic environment by introducing the concept of performance reliability which linked the reliability and actual performance. On-line, real-time applications of performance reliability prediction are useful in operation control as well as predictive maintenance.