Design And Experiment Of One-side Drive Mechanism Of Hyperelastic Boom With Radial Preload

The high stiffness and high precision of the satellite-borne thin film antenna,it require the elastic support boom and the elastic drive mechanism of the thin film antenna as supports.The one-side drive mechanism of hyperelastic boom with radial preload is an important part of the expansion mechanism of the whole thin film antenna.In order to enable the thin film antenna to have higher stiffness after spatial expansion and to expand and close smoothly,the high stiffness pre-tightening mechanism in the one-side drive mechanism of the hyperelastic boom can be used to lock the hyperelastic boom after expansion.The hyperelastic boom can be compressed and wound through the flattening wheel mechanism and the flattening wheel mechanism to ensure the smooth expansion and closure of the hyperelastic boom.The whole drive mechanism has the characteristics of light weight and small volume,which is suitable for the deployment of satellite antenna in space.The one-side drive mechanism of hyperelastic boom with radial preload is taken as the research object.The hyperelastic boom is compressed,wound and unrolled by means of driving mechanism,flattening wheel mechanism and pressing wheel mechanism to ensure the smooth unrolling and folding of the elastic boom.A new type of N-shaped hyperelastic boom is presented,because the working state of the N-shaped hyperelastic boom is mainly under the condition of full expansion,the bending and torsional properties of the N-shaped hyperelastic boom are mainly analyzed.Based on the method of polynomial response surface,the proxy models of bending stiffness around the x-axis,bending stiffness around the y-axis and torsional stiffness around the z-axis are established for the N-shaped superelas hyperelastic boom.The improved non-dominant genetic algorithm is used to optimize the inner central?₂ and the width h of the bonding section for the cross-sectional parameters of the N-shaped boom.Based on the above design and analysis,the principle prototype and test tooling of a one-side drive mechanism with high stiffness preload are developed.The test rig was built to test the principle prototype of the one-side drive mechanism with Radial preload.The main contents of the test were the function experiment of the one-side drive mechanism,the modal experiment of the high-stiffness pretension mechanism and the modal experiment of the one-side drive mechanism.Through experiments,the feasibility of the design scheme of the one-side drive mechanism with high stiffness preload is verified and the accuracy of the analysis is verified.