Reliability Evaluation Method for Meta-action Unit Based on the All Fault Modes

Design for key Meta-action unit is an effective method to reduce the design difficulty of mechanical products. Reliability is an important design index for the Meta-action unit. Traditional reliability evaluation method evaluates the Meta-action unit’s reliability through the fault data after it fails. It means that traditional reliability evaluation method cannot evaluate the Meta-action unit’s reliability during its running process and provide reference for the initial design or reliability condition monitoring. To solve the above problems, this paper evaluated the Meta-action unit’s reliability by using the running data on the basis of its all fault modes. In this paper, firstly, the mechanical system is decomposed by FMA decomposition method and the Meta-action units of the mechanical system is obtained. Then, reliability of the Meta-action unit is evaluated by combining its all fault modes and running data. The reliability evaluation method based on all fault modes can provides references for the initial design and reliability condition monitoring of the Meta-action unit.