Modeling and fault diagnosis for coupled-tank based on rough set theory

Applying the rough set theory (RST), the available knowledge or rules can be extracted from original data. According to this idea, an original information table is constructed by the sampling data from a coupled-tank system, the rule set of the model is obtained through processing of discretization, reduction of condition attributes, rides extraction, completization, and so on. The rough set model (RSM) of the system is designed and verified. Testing results state that the RSM built is valid. It can be used to detect a fault of the coupled-tank system, and the detecting result is given out.