Development of a majority vote decision module for a self-diagnostic monitoring system for an air-operated valve system

• Main Authors: Wooshik Kim, Jangbom Chai, Intaek Kim
• Format: Article
• Language: English
• Published: Elsevier 2015-08-01
• Series: Nuclear Engineering and Technology
• Subjects: Air-operated valve; Artificial neural network; Logistic regression; Machine learning; Support vector machine; Self-diagnostic monitoring system
• Online Access: http://www.sciencedirect.com/science/article/pii/S173857331500114X

A self-diagnostic monitoring system is a system that has the ability to measure various physical quantities such as temperature, pressure, or acceleration from sensors scattered over a mechanical system such as a power plant, in order to monitor its various states, and to make a decision about its health status. We have developed a self-diagnostic monitoring system for an air-operated valve system to be used in a nuclear power plant. In this study, we have tried to improve the self-diagnostic monitoring system to increase its reliability. We have implemented three different machine learning algorithms, i.e., logistic regression, an artificial neural network, and a support vector machine. After each algorithm performs the decision process independently, the decision-making module collects these individual decisions and makes a final decision using a majority vote scheme. With this, we performed some simulations and presented some of its results. The contribution of this study is that, by employing more robust and stable algorithms, each of the algorithms performs the recognition task more accurately. Moreover, by integrating these results and employing the majority vote scheme, we can make a definite decision, which makes the self-diagnostic monitoring system more reliable.