Path feedback method for evaluating the assembly sequence of complex products

The feasibility and efficiency of an assembly sequence of complex products are hard to evaluate directly due to the heavy resources information involved, which leads us to an alternative way by analyzing the feedback information from assembly path. To formalize the relationship between assembly sequences and paths, the original assembly sequence is transferred into an extended representation form called Assembly Process Chain Model (APCM). Such a model integrates the operational information such as product structure, fixture setup, tools utilization and etc. Based on APCM, the swept-volume algorithm is adopted to calculate the assembly paths for each part or resource object. Indices of path complexity and difficulty are introduced to determine the merit rating of a certain path. Validation of the assembly sequence is performed based on these indices, which provides designers decision-making support for sequence adoption or re-designs. A case of aircraft component assembly is given to prove that this method is feasible and practical.