电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2015年
8期
103-105
,共3页
线性辨别分析%特征提取%故障诊断%状态监测%隐马尔科夫模型
線性辨彆分析%特徵提取%故障診斷%狀態鑑測%隱馬爾科伕模型
선성변별분석%특정제취%고장진단%상태감측%은마이과부모형
Linear Discriminant Analysis (LDA)%feature extraction%fault diagnosis%state monitoring%Hidden Markov Model (HMM)
针对模拟电路早期故障识别难度大的问题，提出一种改进线性辨别分析法和隐马尔科夫相结合的故障预测方法。首先设置元件的参数，提取幅频特征；然后采用改进的线性辨别分析（LDA）对电压特征进行提取消除特征的冗余性和高维性；最后将提取的特征用于训练和测试HMM，以实现模拟电路的状态监测。通过实验验证了其具有良好的模拟电路早期故障监测能力。
針對模擬電路早期故障識彆難度大的問題，提齣一種改進線性辨彆分析法和隱馬爾科伕相結閤的故障預測方法。首先設置元件的參數，提取幅頻特徵；然後採用改進的線性辨彆分析（LDA）對電壓特徵進行提取消除特徵的冗餘性和高維性；最後將提取的特徵用于訓練和測試HMM，以實現模擬電路的狀態鑑測。通過實驗驗證瞭其具有良好的模擬電路早期故障鑑測能力。
침대모의전로조기고장식별난도대적문제，제출일충개진선성변별분석법화은마이과부상결합적고장예측방법。수선설치원건적삼수，제취폭빈특정；연후채용개진적선성변별분석（LDA）대전압특정진행제취소제특정적용여성화고유성；최후장제취적특정용우훈련화측시HMM，이실현모의전로적상태감측。통과실험험증료기구유량호적모의전로조기고장감측능력。
Diagnosis of incipient faults for analog circuits is important yet difficult .By combing LDA to reduce feature dimension HMM to identify fault category to evaluate its health performance. Firstly, the corresponding frequency features are extracted from analog circuit with its components change gradually and the voltage feature vectors are extracted from analog circuits. Secondly, due to redundancy and high domain of original features, the superior features are obtained by using the improved LDA . Finally, the processed feature vectors are used to form the observation observation sequences, which are sent to HMM to accomplich the state monitoring . Our method owns the best ability to monitor analog circuit state.
