基于寿命件的民航发动机送修目标确定方法

为了科学合理地制定维修工作范围,提出了一种面向全寿命周期的基于寿命件的民航发动机送修目标确定方法.首先以全寿命周期内送修次数最少、寿命件总成本最低、目标在翼总循环最长为优化目标,建立了多目标优化模型;在分析各优化目标的基础上,提出了一种基于分步求解策略的模型求解方法;最后,采用某航空公司一台航发动机的实际数据对提出的送修目标确定方法进行了验证.结果表明提出的方法能够基于妥协系数和各优化目标权重实现全寿命期内送修次数和寿命件总成本的平衡,能够为发动机送修目标的确定提供决策支持,避免了送修目标确定的随意性.

Approach for civil aero-engine repair objective determination based on life limited parts

To make a scientific and reasonable maintenance workscope, an approach for civil aero-engine repair objective determination oriented towards the life cycle based on life limited parts was proposed. At first, a multi-objective optimization model was established to minimize shop visit times and total life limited parts cost, and maximize total objective time on wing in the life cycle. On the basis of the analysis of every optimization objective, a solution based on the step-by-step strategy was put forward. Finally, the approach for repair objective determination was validated by the actual data of a civil aero-engine from an airline. Validation results show that the proposed approach can achieve a balance between shop visit times and total life limited parts cost in the life cycle, based on a compromise coefficient and every weight of optimization objectives. The approach can provide decision support for aero-engine repair objective determination and avoid the randomness of making repair objective.