一种星载伞天线展开机构研究

天线展开机构使用动力绳实现天线展开和收拢过程中易出现动力绳松弛、脱槽现象。以星载高精度伞状天线展开机构为研究对象，分析天线展开机构的工作原理；利用解析法获得展开机构的运动方程，结合天线展开机构运动部件结构参数，得到天线展开过程中展开机构动力绳的松弛规律；建立以展开机构结构参数为设计变量，以动力绳松弛量最小为目标的展开机构结构优化模型，通过模拟退火法进行求解，得到优化的展开机构结构参数，通过优化前后的展开机构展开、收扰功能试验，测试了机构工作时动力绳的松弛量，验证了展开机构优化的正确性。结果表明：优化后的展开机构动力绳松弛量较优化前降低了90%，优化效果显著。

Study on deployment mechanism of the satellite umbrella antenna

In view of the relaxation and ungrooving of the power rope of the antenna deployment mechanism in the process of antenna deployment and folding, the deployment mechanism of the high precision satellite umbrella antenna is taken an the research object. The working principle of the antenna deployment mechanism ia analyzed. The equation of motion of the deployment mechanism is obtained by analytical method. Combined with the structural parameters of the parts of the antenna deployment mechanism, the relaxation law of the power rope of the deployment mechanism is obtained. Taking the structural parameters of the deployment mechanism as the design variable and minimun relaxation of the power rope as the goal, the structure optimization model of the deployment mechanism is obtained. The structural parameters of the optimized deployment mechanism are obtained by simulated annealing algorithm. The relaxation of the power rope of the optimized deployment mechanism is reduced by 90% compared with that before optimization, and the optimization effect is remarkable.