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Fault diagnosis based on the wavelet packet decomposition, one-against-one support vector machine (SVM) and genetic algorithm (GA) is proposed in order to realize the real-time sensor fault diagnosis accurately. The input feature vectors of one-against-one SVM are produced by wavelet packet decomposition of the sensor output signal. GA is used to obtain optimal parameters of one-against-one SVM network...
The condition of thermal power plant of some SINOPEC is simply introduced first, after choosing its receiving operation, enterprise internal power's dynamic frequency characteristic mechanism has been analyzed under external fault condition, and then arriving at a conclusion that the dynamic frequency characteristic has something to do with active power shortage and frequency adjustment effect modulus...
This paper provides a introduction to rough sets theory and its advantage in dealing with uncertain knowledge in fault diagnosis fields. A new method of case-based reasoning based on rough sets is developed. An algorithm for weight determination based on rough sets is proposed. The relations between decision table and case base are analyzed, and case retrieval is realized. An experimental example...
Diesel engine is a kind of complex power generating machine, and play an important role in industry, which failure rate is high. How to utilize new science and technology to carry out diesel engine fault diagnosis is a lasting topic. Instantaneous angular acceleration of diesel crankshaft contains a little information for diesel engine fault diagnosing and its power balance evaluating. In this paper...
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