环形桁架式天线展开不同步现象分析

从国外相关文献所反映的地面试验结果看，环形桁架式天线周边的桁架结构由于阻尼等因素在展开过程中存在明显的不同步现象。文章利用绝对节点坐标法建立了天线展开过程的多柔体展开动力学模型，获得了连续展开过程中桁架各部分承受的载荷和变形情况，并重点对展开过程中的不同步现象的产生原因及其影响进行了分析。结果表明，环形桁架式天线展开的不同步现象是由展开过程中桁架的变形与摩擦引起的，这种现象的出现导致桁架结构承受更高的载荷。该研究为环形桁架式天线的设计和验证提供了参考。

Research on Non-synchronization During Deployment of Hoop Truss Deployable Antenna

The non-synchronization phenomenon during the deployment of the hoop truss deployable antenna is obvious in the ground test, which was caused by the damping and other factors. The multi-flexible dynamics system model was established by the absolute nodal coordinate formulation (ANCF). To analyze the non-synchronization phenomenon, the stress and the distortion were obtained during the continuous deployment of the truss. The results show that the non-synchronization is caused by the distortion and friction between the elements of the antenna. The non-synchronization phenomenon is consistent with the stress, which makes the truss endure higher load.