| 陈君伟.航空发动机FADEC闪电防护部件检查间隔分析[J].航空发动机,2023,49(1):145-150 |
| 航空发动机FADEC闪电防护部件检查间隔分析 |
| Inspection Period Analysis for FADEC Lightning Protection Features of Aeroengine |
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| DOI： |
| 中文关键词: 全权限数字电子控制 闪电防护部件 检查间隔 马尔可夫分析 限时派遣 航空发动机 |
| 英文关键词:FADEC lightning protection feature inspection period Markov analysis time-limited dispatch aeroengine |
| 基金项目:航空动力基础研究项目资助 |
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| 中文摘要: |
| 为确定航空发动机全权限数字电子控制（FADEC）闪电防护部件检查间隔，以限时派遣分析方法为基础，分别在2种典
型FADEC构型的马尔可夫模型中引入闪电防护部件失效状态。通过对模型稳态解的计算推导，形成推力控制丧失概率与闪电防
护部件检查间隔的函数。以某型发动机FADEC失效数据为例，呈现了闪电防护部件检查间隔分析过程。结果表明：若闪电防护
部件失效率足够低，2种构型的闪电防护部件失效对推力控制丧失概率的贡献均不超过2%，不需要单独制定闪电防护部件的检查
计划，防护功能的检查可与被保护单元的修理合并；若闪电防护部件失效率高于被保护单元失效率的1/10，闪电防护部件失效对
推力控制丧失概率的贡献可能超过20%，则有必要对闪电防护部件制定专门的检查计划。 |
| 英文摘要: |
| In order to determine the inspection period of lightning protection feature of the aeroengine FADEC，based on the time-lim?
ited dispatch analysis method，the failure status of the lightning protection features were introduced into the Markov model of two typical
FADEC. Through calculating and deducing the steady-state solution of the model, Formed a function of the probability of LOTC and the in?
spection period of lightning protection feature. Taking FADEC failure data of an engine as an example, the analysis process of inspection in?
terval of lightning protection parts is presented. The results show that if the failure rate of lightning protection feature is low enough, the con?
tribution of the failure of two configuration of lightning protection feature to the probability of LOTC is no more than 2%, it is not necessary
to make a separate inspection plan of lightning protection feature, and the inspection of protection function can be combined with the repair
of protected unit. If the failure rate of lightning protection feature is more than one-tenth of the protected unit, the contribution of lightning
protection parts to the probability of LOTC may exceed 20%, and it is necessary to make a special inspection plan for lightning protection
feature. |
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