Civil airplane APU performance assessment and fault pre-warning method

Abstract

The invention discloses a civil airplane APU performance assessment and fault pre-warning method, and relates to the technical field of equipment state monitoring. According to the method, based on QAR data of an airplane, a health state model of an important parameter in an APU is dug out by a machine learning technology; then the predicted value of the health state model is subtracted from the actual measured value of the APU state parameter, and thus the deviation value of the state parameter is acquired; then the deviation values of the several key parameters are fused into a health indexby using a regression model, and the health index is used for representing the degradation degree of APU performance, and fault pre-warning is timely emitted according to a set warning value. The method provided by the invention is applied to the civil airplane APU, particularly the APU that is faulted due to performance degradation, the problem of being lack of airplane APU performance assessmentmeans is solved, the performance state of the APU can be accurately assessed and the APU fault can be found at the early stage and the pre-warning can be timely emitted, and unplanned issuing eventscan be reduced; meanwhile, performance assessment data is from the existing civil airplane QAR data, and the method is relatively strong in practicability and operability.

Description

technical field [0001] The invention relates to the technical field of equipment state monitoring, in particular to a civil aircraft APU performance evaluation and fault early warning method. Background technique [0002] It is very beneficial to both airlines and maintenance companies to make accurate predictions in advance of the timing of APU (Auxiliary Power Units, auxiliary power units) of civil aircraft. Accurate forecasting can enable airlines and maintenance companies to make preparations in terms of funds, personnel and time in advance, so as to ensure the safety and efficiency of airline operations. Reasonable timing for repair is not only very important for aircraft, but also for APU. [0003] APU is the abbreviation of airborne auxiliary power unit. It is located at the tail of the aircraft and is a small turbine engine. Its main function is to provide power and air source. It is mainly used to start the main engine and cabin air-conditioning bleed air on the g...

AI Technical Summary

Problems solved by technology

[0009] To sum up, there is a lack of a non-parametric modeling method to evaluate the performance of APU in the prior art, and real-time quantitative evaluation of the performance of the APU can be carried out without the physical model of the system or the fault or failure data of the system, effectively reducing APU outages. Failure to prevent APU from super-economic maintenance

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