Fault detection based on system feedback

This paper presents a method to detect the fault of transducers in closed-loop control systems. The method described in this paper is based on analytical redundancy. The fault is diagnosed using the information included in the model and the actual plant measurement signals. The necessities imposed for the fault detection algorithm are: rapid answer in the case of fault, which comes out; the diminution of the risk to come out false alarms. The technology by which the process is presented is a coupled tank apparatus that consists of two acrylic containers with identical dimensions. We developed the fault detection structure and the level control system under MATLAB Simulink.