The large assembly equipment with multi-DOFs always have complicated structure and driven form. By applying the freedom decomposition of large assembly equipment

a motion component with multi-level structures is proposed for abstract modeling of multi-DOFs assembly equipment. A node cell is realized to build the virtual models and a template is constructed for the modeling of this type of equipment. Based on the multi-DOFs model

integrated motion simulation of equipment and assembly object can be achieved through online specifying their relationship interactively. A common platform is developed for the large multi-DOFs assembly equipment modeling and simulation

and an overhead crane is used to demonstrate the methods.