Distributed Fault Monitoring in Manufacturing Systems Using Concurrent Discrete-Event Observations*

The discrete-event nature of on-line data from an automated manufacturing system offers many challenges for on-line fault detection. In this paper, the template monitoring method is developed as a simple but versatile method of using discrete event signals for fault monitoring of manufacturing syst ems. This monitoring method is easily distributable, suitable for monitoring highly concurrent systems, and has low computational requirements. This paper describes template monitoring using event observations, and demonstrates a method for automatically generating template monitoring models from timed automata specifications.