Research and Application of Aircraft MTBF and MTTR Variation Trend Based on Gauss
Aiming at the problem that the maintenance information data of typical airborne systems/subsystems/products of aircraft is large and complex,which makes it difficult to effectively calculate and analyze the change trend in practi-cal work,this paper designs and studies a Gaussian Aircraft MT-BF(Mean Time Between Failures)and MTTR(Mean Time To Repair)Trend Analysis Model.Firstly,based on weekly,weekly accumulation,monthly,monthly accumulation and other related maintenance information as constraints,a large number of field quality monitoring and maintenance data of the air-craft/airborne sys-tem/subsystem/product were classified,error-sorted,screened,sorted,statistical and analyzed.Secondly,the eval-uation methods of MTBF and MTTR for airborne systems/subsystems/products are studied.The MTBF and MT1R are evaluated,and the confidence limits of MTBF and MTTR are determined.The data sets of MTBF and MTTR are constructed.Finally,a Gaussian aircraft MTBF and MT1R trend analysis model is proposed.The Gaussian MTBF and MTTR trend analysis al-gorithms for airborne systems/subsystems/products are designed.On this basis,the Gaussian trend anal-ysis model is used to test and verify the variation trend of aircraft MTBF and MTTR.The results show that the designed Gaussian aircraft MTBF and MTTR trend analysis model can well describe the MT-BF/MTTR trend and rule of the aircraft/airborne system/subsystem/product,which verifies the effec-tiveness of the method.The results can be directly applied to aircraft field data processing and analysis and aircraft support activities,which has a good prospect and practical application value.
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