Reliability modeling of manufacturing systems based on the task network evolved by key quality characteristics

With the increasing requirements of product reliability and complexity of manufacturing system, the limitation of traditional reliability analysis of manufacturing systems neither considered product quality, nor the weight of key stations. Therefore, aiming at improving the product reliability, a reliability modeling of manufacturing systems based on the task network evolved by key quality characteristics is presented. Firstly, to identify the key task nodes of manufacturing system, the relationship between manufacturing system and product reliability was established in view of axiomatic design (AD), and the task network model evolved by product key quality characteristics was proposed based on axiomatic design theory successively. Then the reliability analysis model of manufacturing systems was put forward based on the capacity and failure rate of the key task nodes. Finally, a reliability analysis case of a piston ring machining system is given to verify the availability of the model.