Abstract
The feature identification method based on artificial intelligence can significantly improve accuracy and effectiveness of sensor fault diagnosis. An improved support vector machine (SVM)-K-nearest neighbour (KNN) classification method that combines one-verse-rest (1-v-r) SVM and KNN was brought for sensor fault recognition. The method firstly constructs 1-v-r SVM training set by primary selection on training samples, and then classifies it using 1-v-r method. It re-classifies indivisible samples with KNN algorithm. Fault diagnosis experiment on photoelectric encoder sensor verifies that it can determine current fault belongs to which type of common sensor faults. The experiment also compared SVM-KNN with one-verse-one (1-v-1) SVM and bintree SVM. Results show that it has better classification accuracy and classification speed.
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