Mechanical Design And Analysis Of The Cable And Cabin System Of Large Radio Telescope

China hopes to build the Largest Radio Telescope (namely FAST) in the world. Because of the very strict demand on the tracking precision, the mechanical design of the telescope becomes a key of the project. Professor Duan Baoyan proposed an innovative optomechatronic design project of large radio telescope: using six cables to control the feed cabin to which a Stewart platform is connected. The elementary adjustment of cables and the fine-adjustment of Stewart platform cooperate together to reach the precision demand.The thesis aims at concretizing the design project, studying and solving the mechanical problems. To reach the aims, an indoor 5m model and an outdoor 50m model are designed respectively by the author which lay solid foundation for FAST.LT mechanism is divided into three main parts: cable drivers, structure on the top of cable tower and the cabin. The characteristics and special requirement of the mechanical structures are analyzed in detail and the corresponding design proposal is developed firstly. Then the final design of mechanical structures is proposed by means of analysis, comparison and proof methodology. Finally, both indoor 5m model and outdoor 50m experiment model have been built.By the design, the manufacture, the assemblage, the adjustment and the tests of both the indoor 5m model and the outdoor 50m model, many datum on supporting cable are obtained. A lot of site experiment on model are made to demonstrate the design. To carry out LT500m project, the following researches should be done further:1. To study further driving power and safely breaking way, such as using hydraulic power.2. Cabin in the model is not completely similar to that in 500m project, so the structure of Cabin also should be further probed.3. Other ways also can be used as Structure of Protecting Cable from Lapsing.