Engine fault diagnosis based on the weighted DS evidence theory

Engine as a typical reciprocating power machinery, its complex structure determines its fault complexity and diversity, from the operating environment, system noise and sensor accuracy brings the uncertainties effect, results in accuracy rate lower of engine fault diagnosis, taking into account the limitations of traditional DS evidence theory, weighted DS evidence theory are studied. Finally, the engine as an example, setting engine fault diagnosis experimental system, finish data samples, extract character parameters, study weighted evidence theory, and test and analysis indicate the superiority of weighted DS evidence theory.