net based formalIzatIon model model parametryczny nIezdatnoścI przejścIowej oraz model formalny oparty na stochastycznej sIecI

The intermittent fault widely exists in many products and brings high safety risk and maintenance cost. At present there are some different opinions on the notion of intermittent fault and there is no comprehensive parameter framework for fully describing intermittent fault. Also the formalization model which can mathematically describe intermittent fault hasn’t been constructed. In this paper, the conception of intermittent fault is discussed. A new definition of intermittent fault is put forward. Then the intermittent fault’s parameter framework is presented. After that, the Stochastic Petri Net (SPN) based formalization model for intermittent fault is constructed. Finally an application of the SPN formalization model is shown. The parameters for intermittent fault are computed based on the proposed model and a case study is presented. The result shows the validity of the model. The model could assist the further research such as intermittent fault diagnosis and prognostic of remaining life.