Deployment Accuracy Measurement and Analysis of Truss Structure for Modular Space Deployable Truss Antenna

doi:10.3901/JME.2020.05.063

Abstract

Abstract: To study the influence of truss structure for metal mesh deployable antenna on the surface accuracy of reflector, experiment and analysis on deployment accuracy measurement of truss structure for modular space deployable truss antenna are carried out. According to the structure features of truss structure, key node mathematical model is established based on the basic theory of robotics. Then, suspension following microgravity expansion test device is designed. By using the principle of digital close-range photogrammetry, the deployment accuracy of truss structure is measured and tested. Meanwhile, the surface accuracy, repeated deployment accuracy and key node error of truss structure are analyzed. The results show that the root mean square error (RMSE) of the key nodes on the truss structure is small, and the surface formed by the key nodes has a high surface accuracy; the maximum error of the key nodes is less than 1 mm in repeated deployment tests, and the consistency of the structure deployment is good; after fully deployment, the measured values of the key nodes are close to the theoretical values, and the manufacturing and installation of the truss structure are good. The methods of measurement and analysis presented provide a reference for the research of deployment accuracy of other types of metal mesh deployable antenna truss structure.

Key words: space deployable antenna, truss structure, module, surface accuracy, digital close-range photogrammetry

CLC Number:

V443

TIAN Dake, LIU Rongqiang, YANG Xieliu, DENG Zongquan. Deployment Accuracy Measurement and Analysis of Truss Structure for Modular Space Deployable Truss Antenna[J]. Journal of Mechanical Engineering, 2020, 56(5): 63-71.

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