Optimal Design And Analysis Of Space Antenna Deployment Arm Simulation Microgravity Device

The space antenna deployment arm is a key component used to drive the satellite antenna to ensure stable attitude or to track the target.When the antenna deployment arm is on the ground to simulate the deployment movement in space,due to the influence of ground gravity,the gravity of the deployment arm assembly needs to be offset,so that the deployment arm is in zero gravity when it is deployed on the ground.status.The zero-gravity tooling of the antenna deployment arm developed by the 529 Factory of the Fifth Aerospace Academy in a previous project has imperfections in terms of quality and stiffness.Therefore,a light-weight and high-rigidity zero-gravity tooling is designed to provide a closer to zero gravity.The environment makes the deployment arm closer to the real deployment state in outer space when it is deployed,which is an important content that needs to be resolved urgently.First of all,the design of the zero-gravity test device for the deployment arm was carried out.Through the previous investigation of the domestic and foreign test methods,and the analysis of the functions to be realized by the zero-gravity test device for the deployment arm,two test programs were designed.The quality and application method are analyzed and compared,and it is determined that the suspension method is more suitable for the deployment experiment of this article.Then determine the expected optimization index of the deployment arm experimental device,and put forward the overall design requirements of the experimental device through the optimization index.Through the analysis of the rocker arm support structure designed by the empirical method in the previous project,the quality of the lifting arm components is basically similar,but the rocker arm support has a larger mass and poor rigidity;the base structure method is used to redesign the rocker support structure to obtain The best distribution status of the rods;the three-dimensional model of the rocker arm bracket is established through Solidworks;the design of the suspension wire gravity compensation mechanism mainly includes the horizontal fine-tuning mechanism,the tension sensor,the force adjustment knob,the spring,the pulley block and the unfolding arm clamp.Use ANSYS workbench to perform static simulation analysis on the rocker arm support,obtain the results of its displacement and stress in the vertical direction,and find out the position of the rocker arm support with poor stiffness through the displacement cloud diagram and stress cloud diagram;The beam with poor stiffness in the large-arm rocker arm support is further optimized in structure and size to obtain the optimal cross-section parameters,andthe stiffness of the structure is simulated to calculate whether the stiffness of the structure is strengthened;finally,the variable density method is used to transfer the force path of the rocker arm support It is not removed through the unit in the rod,so as to achieve the purpose of lightweight design and meet the needs of actual production.