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Aiming at monitoring health degradation of analog circuit, the paper proposes a new method about state monitoring and health evaluation. Firstly original voltage features are extracted from analog circuit with some components changing gradually; Then LDA is used to reduce the dimension of the original features to obtain effective features; In the following with the effective features of normal state,...
Feature extraction is the most important step in effective state monitoring of analog circuit. Due to variety of features, the paper proposes a new approach to monitor state of analog circuit: Firstly, composite features including time-domain features and wavelet features are extracted from the response signal through giving different stimulus to analog circuit; Secondly, HMMs trained by composite...
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