Multi-stage maintenance decision modeling method and device for intelligent manufacturing production line

The invention discloses a multilevel maintenance decision modeling method and device for an intelligent manufacturing production line, and the method comprises the steps: obtaining the fault time distribution of a function fault and a degradation fault of a part through the historical fault data of the part; constructing a functional life model and a degradation life model of the component according to the fault time distribution; constructing a function availability model, a performance availability model and a performance availability penalty model of the equipment according to the function life model and the degradation life model of the part; using the function availability model, the performance availability model and the performance availability penalty model of the equipment to calculate the loss of the production line caused by the function fault and the degradation fault, and constructing a production line benefit model; and according to constraint conditions of production line requirements, carrying