Abstract: According to the feature that satellite cables belong to flexible parts, the cable geometrical model and dynamics model based on physical characteristics are proposed by using a dynamic nonuniform rational BSplines (Dynamic NURBS). Cable stiffness, mass distribution, internal deformation energy and other physical quantities are taken into account in models, real shape and movement of the cable can be effectively reflected and the cable’s length can be estimated in the virtual environment, which provides theoretical support for virtual assembly of cable satellite.

Key words: satellite cable, geometric model, physicsbased model, DNURBS