Diagnosis method of multi-cause process quality under incomplete information

Abstract:

Aiming at the problem of multi-cause process quality diagnosis under the circumstance of information losing, a method based on construction and inference of Bayesian network model is proposed. In the learning process of Bayesian network structure, the thought of score/search is adopted for the assumption structure so as to reduce the learning complexity through the mutual information parameters sorting. In view of the influence of random factors on the diagnostic accuracy, the Leaky Noisy-OR model is adopted, which simultaneously degrades the requirement quantities of data and reasoning. In the end, a problem diagnosis for channel grinding is taken as an example to verify the feasibility and effectiveness of the proposed model and optimization method.