Survey on hidden Markov model based fault diagnosis and prognosis

In this paper, the achievements of HMM-based fault diagnosis and prognosis are introduced. The importance of fault diagnosis and prognosis in complex dynamic industrial systems, together with the basic and the extended algorithm of HMM, are briefly presented. Then the research process of HMM-based fault diagnosis and prognosis methods in available literatures are reviewed and analyzed. After concluding the hot spots and technical difficulties, the main challenges that need to be solved and the developing trends in this field are also presented.