基于模糊数的航空发动机可靠性预计模型

根据模糊数适于量化模糊信息的特点,运用模糊集和区间分析理论,提出了一种基于模糊数的多级模糊综合评判方法,它能更好地根据模糊信息作出模糊决策。在此基础上,结合航空发动机可靠性的特点,建立了一种航空发动机可靠性预计的模型。该模型的特点是能够在综合考虑各种可靠性影响因素及其模糊性的情况下,对发动机的可靠性水平作出较为客观的综合评判,尤其适用于航空发动机设计初期的可靠性预计。 

A Model of Aeroengine Reliability Prediction Based on Fuzzy Number

According to the property of fuzzy number which is suited for quantifing fuzzy information,an approach to multi-stage fuzzy synthetical assessment based on fuzzy number is proposed by use of fuzzy sets and interval analysis, which can make a fuzzy decision well in terms of fuzzy information.A model of reliability prediction for an aeroengine is developed by applying the approach and considering the reliability properties of an aeroengine.By means of the model,the reliability level of an aeroengine can be assessed more objectively because a variety of the factors influencing aeroengine reliability can be synthetically considered in the model.Therefore the model is particularly adaptable to the reliability prediction in initial design stage for an aeroengine.