本文關(guān)鍵詞： 故障診斷 健康管理 貝葉斯 測(cè)試性 外場(chǎng)驗(yàn)證　出處：《空軍工程大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年03期 　論文類(lèi)型：期刊論文

【摘要】：針對(duì)目前先進(jìn)飛機(jī)的預(yù)測(cè)與健康管理系統(tǒng)(PHM)投入使用后尚缺乏系統(tǒng)的外場(chǎng)驗(yàn)證和評(píng)價(jià)技術(shù)手段,提出了基于先驗(yàn)信息的PHM診斷能力外場(chǎng)評(píng)估和驗(yàn)證方法。首先利用飛機(jī)研制、試驗(yàn)期間PHM系統(tǒng)積累的各LRU(外場(chǎng)可更換單元)的診斷信息,確定LRU和系統(tǒng)的診斷能力指標(biāo)先驗(yàn)估計(jì)值,再利用外場(chǎng)數(shù)據(jù)對(duì)先驗(yàn)分布進(jìn)行修正,形成后驗(yàn)分布,最后利用后驗(yàn)分布得到系統(tǒng)/分系統(tǒng)的PHM診斷能力參數(shù)后驗(yàn)估計(jì)值。通過(guò)以典型測(cè)試性參數(shù)以故障檢測(cè)率和故障隔離率進(jìn)行實(shí)例分析,得到了不同置信度下故障檢測(cè)率和故障隔離率的置信下限。估算結(jié)果表明該方法科學(xué)合理,實(shí)用性較強(qiáng),能夠滿(mǎn)足小樣本條件下外場(chǎng)評(píng)估的工程實(shí)際需要。
[Abstract]:After the advanced aircraft prediction and health management system (PHM) is put into use, there is still a lack of systematic field verification and evaluation technology. An outfield evaluation and verification method of PHM diagnostic capability based on prior information is proposed. Firstly, the diagnostic information of each LRUs (field replaceable unit) accumulated by PHM system during the test period is used in the development of aircraft. A priori estimate of the diagnostic capability index of LRU and the system is determined, and the posterior distribution is formed by modifying the prior distribution with the field data. Finally, the posteriori distribution is used to obtain the posterior estimation of the PHM diagnostic capability parameters of the system / subsystem. A case study is carried out by taking the typical testability parameters as the fault detection rate and the fault isolation rate. The lower confidence limits of fault detection rate and fault isolation rate under different confidence levels are obtained. The estimated results show that the method is scientific and practical and can meet the practical engineering needs of field evaluation under small sample conditions.
【作者單位】： 空軍工程大學(xué)航空航天工程學(xué)院;空軍裝備研究院;
【基金】：國(guó)家自然科學(xué)基金(71501185)
【分類(lèi)號(hào)】：V267
【正文快照】： 引用格式:郭基聯(lián),邵帥,虞健飛.飛機(jī)PHM系統(tǒng)故障診斷能力外場(chǎng)驗(yàn)證模型[J].空軍工程大學(xué)學(xué)報(bào):自然科學(xué)版,2016,17(3):1?5.GUOJilian,SHAO Shuai,YU Jianfei.Research on Field Verify Model of Fault Diagnosis Ability in Aircraft PHM System[J].Journal of Air ForceEngineer

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