Fuzzy fault tree reliability analysis based on improved T-S model with application to NC turret

In Takagi and Sugeno (T-S) fuzzy fault tree analysis (FFTA), the construction of T-S gates relies too much on expert experience, which will result in inevitable subjective errors. order to overcome this disadvantage, a new method was proposed no longer solely historical data experience but is also determined by importance basic events top event. method, degrees were described as numbers; probabilities possibilities. The index can be solved through model Monte Carlo (MC) simulation. suitable for systems where exact information components magnitude failure effect system are not available. concept calculation probability presented. Finally, applied analyze reliability NC turret seal subsystem, accuracy verified comparing with methods based traditional FFTA FFTA, weak points obtained analysis, provide diagnosis preventive maintenance.