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作 者:杨军刚[1] 肖勇[1] 赵治华[2] 范叶森[1] 宋燕平[1] 赵将[1]
机构地区:[1]中国空间技术研究院西安分院,西安710100 [2]清华大学航空航天学院,北京100084
出 处:《中国科学:物理学、力学、天文学》2017年第10期23-32,共10页Scientia Sinica Physica,Mechanica & Astronomica
基 金:国家自然科学基金(编号:1290154;1205322;11402196)资助项目
摘 要:作为星载大型天线的典型结构形式,大型环形桁架天线在新一代大型通信卫星、中继卫星、对地观测卫星等中需求迫切,且需求的口径越来越大.然而随着天线口径的增大,天线展开所需要的驱动力也急剧增大,使得传统的电机-动力绳集中式驱动展开方式存在展开可靠性的问题.本文建立了大型环形桁架天线动力学仿真模型,对集中式电机驱动展开过程进行了仿真,揭示了集中式驱动下电机动力在传力路径上摩擦损失而导致的展开不同步问题,并对其展开过程能量消耗进行了分析,总结了集中式驱动存在的不足.在此基础上给出了一种基于负刚度驱动装置的分布式驱动展开方法,并通过数值算例验证了其有效性.As the typical structure of the large satellite antenna,the hoop-truss deployable antenna with large aperture is in urgent need in the new generation of large communication satellite,the relay satellite and the earth observation satellite.At the same time,the requirement of the antenna aperture size tends to become bigger and bigger.However,with the increase of antenna aperture,the driving force required for deployment of antenna is also increasing rapidly,which leads to the reliability problem in the traditional centralized drive mode with the motor and driving cable.The dynamics simulation model of the large Hoop-Truss deployable antenna was established in this paper firstly,and the dynamics simulation of the deployment of the antenna with the motor and driving cable was carried out,respectively.This paper reveals the problem of the asynchronous synchronization of deployment caused by the friction loss of the motor driving force in the load path.The energy consumption during the process of antenna deployment is analyzed,and the growth trend of motor driving force as the antenna aperture increases.The shortcomings of centralized-driving mode with the motor and driving cable are summarized,which mainly caused by the decreasing of driving cable force due to friction.On the basis,a method of distributed drive deployment based on negative stiffness driving device is presented.The design of negative stiffness driving device is given in the paper.The multi-stage non-circular gear device based is used to realize the negative stiffness joints and the design method of key transmission ratio of multi-stage non-circular gear device is also given in the paper.Finally,numerical example of 25 m antenna is demonstrated to verify the effectiveness of the proposed distributed driving method.
关 键 词:环形桁架天线 展开过程仿真 集中式驱动 分布式驱动 负刚度驱动装置
分 类 号:V443.4[航空宇航科学与技术—飞行器设计]
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