Structure Characteristic Analysis Of Spaceborne Deployable Antenna

Because space environment's complexity, spaceborne antenna's structure characteristic and no repair in space, the security of spaceborne antenna structure is very importance. This paper has analyzed and researched the structure characteristic of a new spaceborne deployable antenna with folded-loop and folded-rib to afford some necessary datas for improving design of antenna structure.According to the structure characteristic of spaceborne deployable antenna with folded-loop and folded-rib, the processes of structure analysis are given as below:The structure characteristic of framework of 3m and 60m deployable antenna is researched under different circumstance . The preferable experimental method is found through analyzing and comparing under gravity circumstance; the distortion of antenna is got under less gravity circumstance,it gives a referrence for analyzing electricity capability of antenna.The 60m inflatable tube and tours is carried out analyzing and optimizing.The statics analysis results shows the inner pressure must be suitability;inner pressure and the thickness of the torus is found with the root-mean-square error of distortion quantity is least through optimizing.60m deployable antenna is carried out dynam analyzing and model analyzing. The distortion is got under gravity circumstance; the model analysis shows that bigger cross section of loop and rib , thiner reflector and more restriction can all improved the low frequency.Based on the function of ANSYS software to run several field coupling,60m antenna reflector's thermal distortion under the sun irradiating is solved to get antenna's node temperature distortion displacement at different moment.Through the dynamic analysis of spaceborne deployable antenna , it is validated the feasibility of this new type of spaceborne antenna structures and the problems needed to solve. This work can give reference for the design and research of the deployable structure.