Mission Reliability Assessment for Aircraft Based on Flight Parameters

摘要

The mission reliability of aircraft varied under different missions, because the load conditions of the aircraft are diverse. When sample size is small, traditional mission reliability assessment method cannot give the assessment with specific mission, only to appear an average result. This paper suggests a new method based on flight parameters that can give the assessment result purposefully for specific mission. By using fault data and flight parameters synthetically from physics of failure, the mission reliability model was established according to the relationship between flight loads, flight parameters and reliability. Based on the established model, the statistical inference methods of failure rate for aircraft were proposed, and the mission reliability was assessed according to the flight parameters and fault data of the aircrafts. The illustrative example shows that the results of the methods proposed in this paper have the same size with which current method gave, which proved that the methods are reasonable. Furthermore, it also shows that the new methods are more targeted on specific mission and straightforwardness for engineering application.