Research On Analysis And Simulation Of Space Deployable Structures

Deployable structure is a new type of engineering structure, and its ability to deploy and fold freely exhibits a new application foreground. Some research organizations have put forward to many deployable engineering samples. One of these structures is called X type structure, which is only composed of rigid linkage and revolute joint has some new properties including simple structure, good consistence in structural geometry cell, high rigid, aseismatic and flexible. So in the aspect of architecture and large space deployable structures, this structure has broad application foreground. The other main use of the deployable structure is in the aspect of deployable antenna. In all of the antennas, hinged-rib antenna has simple structure form, light weight, small stowed diameter and storage height and prone to be large-scaled.Based on the structural geometrical connections of a radially foldable planar linkage, the locus of the hinged points in a scissor-like unit composed of angulated elements is derived, the structural constrained conditions of the scissor-like unit is discussed when the hinged points move radially. Then the kinematic equations of two inter-connected angulated elements are presented, the kinematic model of deployment for foldable linkages is established using the method of coordinate transformation. Some new properties of this radially foldable linkages are revealed including the condition for the maximum deployed extension and the angulated relationship between two inter-connected elements. The structure connections and kinematic model of multilayer deployable linkages have been established by discussing the special case of all the hinged points moving radially. Finally, the simulation examples verify the effectiveness of the kinematic analysis method.Based on structure characteristic of the paraboloid antenna, have analyzed the f /D impact on the antenna performance. According to the structural relation of the hinged-rib antenna and movement principle, utilize C ++ Builder and virtual prototype software to develop the hinged-rib antenna software which could analysis and simulate the course to deploy. This software can finish rigid and flex body dynamic analysis of the course to deploy of the antenna automatically. Have analyzed different frictional force is distributed to influence the course to deploy of the antenna. To show different cable forces when compared in different calibers. Have considered the course to deploy of dynamic analysis of hoop truss antenna with Coulomb Frictional Force.