Isostress Winding Tension System Design Of Long Distance Fiber On A Bobbin

Optical fiber is wound on a bobbin with a certain tension,adopting a suitable tension system can improve the overall performance of shell. Optical fiber is the only route in transmitting information for optic-fiber-guide missile,while the optical on a bobbin is the core component of optical fiber guided weapons.This paper is focused on the study of the tension system,introduced the winding principle and the structure of the briefly,analyzed the winding defects in the optical fiber on a bobbin systematically.Duing to the problem that too many layers in the long-distance fiber and the great stress value between the inner layer and the outer layer,which causes the inner layer filament is shrink while the outer layer filament is tight.We proposed a design method of long distance optical fiber isostress tension system for fiber winding technology.Firstly,we analysed the stress status of optical fiber and bobbin in detail on the principle that isostress status is distributed in each layer based on elastic mechanics theory,established a model to show the distribution of stress.Secondly finding out the relationship between stress and tension establishing the isostress tension system.Finally,making simulation of stain and stress in optical fiber on a bobbin under isostress and fixing tension by ANSYS Mechanical finite element analysis software to show the advantage of isostress tension system.The simulation results show that the difference of stress between the inner and the outer layer of the fiber is very big under the isotension in the same tension stress,and the phenomenon that the inner layer gets loose while the outside layer gets tight is serious relatively,meanwhile,the deformation occurred in the middle of the bobbin becomes maximum.However,adopting isostress can reduce the difference between each fiber layer,and the phenomenon mentioned above is relieved obviously.Moreover,the deformation of the bobbin is reduced as well.