Abstract: The assembly tolerance representation model based on assembly sequence is
proposed. In order to construct the assembly tolerance information model, the assembly parts’
related characteristics and the parts’ key characteristics are figured out, and all the processes are
based on the assembly simulation sequence. This model considers the process of accumulated
assembly tolerance which is affected by assembly sequence. This method decreases the
complicated interactive operation in the artificial tolerance information modeling. In addition, it
improves the quality of the assembly tolerance representation model. An aircraft assembly
simulation system has been developed based on DELMIA and successfully deployed in aircraft
assembly simulation in the engineering practice.

Key words: aircraft assembly, assembly sequence, assembly characteristic, tolerance
information model