Sensor Location Strategy in Large-Scale Systems for Fault Detection Applications

Fault detection in large-scale systems is conducted by the use of sensors, thus the sensor location influences the performances of fault detection directly. As the scale of systems increases, traditional input-output models may not work well or may even not be applicable. The Signed Directed Graph (SDG) model is used to describe large-scale complex systems and the cause-effect relationships among variables. However, SDG cannot express the dynamic propagation properties when describing the fault propagation phenomena. In this paper, time parameters are taken into account within the branches of an SDG, in order to approximately denote the propagation time of the variable changes in the systems. An SDG constructed this way is called a dynamic SDG. As to sensor location, because of the economic and technical limitations, the number of sensors should be limited while meeting the demands of fault detection. We analyzed the main criteria of the fundamental demand such as reachability, detecta...

• Type: Journal
• Year: 2008
• Where: JCP
• Authors: Fan Yang, Deyun Xiao
• Keywords: Fault Detection, Fault Propagation, JCP 2008, Sensors