The Analysis Of Control System Validity Based On Signed Directed Graph

Fault diagnosis is an important task for the safe and optimal operation of chemical process. Hence, this area has attracted considerable attemption from researchers in the past few years. A variety of approaches have been proposed for solving this problem. All approaches for fault detection and diagnosis in some sense involve the comparison of the observed behavior of the process to a reference model. The process behavior is inferred using sensors measuring the important variables in the process. Hence, the effency of the diagnostic approach depends critically on the location of sensors moritoring the process variables. An optimally located network of sensors is a prerequisite for successful application of fault diagnosis techniques. Most of the previous work in the area of fault diagnosis deals with methodologies for identifying possible faults, given sensor data. Available literature suggests that very little work has been done on methods for optimally locating the sensors for efficient fault diagnosis. A digraph-based approach is proposed for the problem of sensor location for identification of faults. Various graph algorithms that use the developed...