Distributed Detection for Plantwide Processes with Randomly Occurring Faults*

This paper presents a distributed fault detection scheme for plantwide chemical processes with randomly occurring faults (ROFs). First, we introduce a general two-port system model for the plantwide chemical processes. The distributed fault detectors are designed for plantwide systems where interactions between process units are accounted for. Then, the fault-sensitive condition as well as disturbances attenuation condition are formulated. Based on the vector dissipativity condition, the detection gains are obtained offline via solving linear matrix inequalities (LMIs), and the global evaluation functions are calculated for online fault detection. Finally, a numerical example is provided to illustrate the effectiveness of the proposed approach.