Abstract: The functions, applications, developments and current application mode of IDS3.x system are generally introduced in this paper. Then the development mode of spacecraft based on IDS3.x system is described. The existing problems especially the information redundancy of mechanical interface and their effects are pointed out. A new solution is proposed by developing 3D-IDS system. The central functions of 3D-IDS system are shown in this study. A new application mode of 3D-IDS system is explored and described by showing how to fill in, countersign and apply with 3D-IDS file. The 2D drawing and sketch are removed from 3D-IDS system to avoid information redundancy of mechanical interface. The consistency between 3D model and the parameters of IDS file can be guaranteed by the interface tool. The efficiency of filling in, countersigning and applying, has been improved significantly, which greatly promotes the coordination and total efficiency of spacecraft system design departments and unit design departments.

Key words: 3D-IDS, management, mechanical interfaces