射电望远镜天线副反射面并联调整机构设计

摘要

According to the specific requirements of the sub-reflector adjustment mechanism when the 65m diameter round movable radio telescope system observes,the Stewart platform as the Shanghai 65m radio telescope antenna sub-reflector adjustment system is proposed.Based on the optimal force of the rods when the main reflector and the sub-reflector is on the whole workspace,the configuration parameters integrated design method about the consideration to the workspace and to avoid interference between the bar and other factors is researched.Configuration parameters met the real requirements are obtained.The workspace is solved under the configuration.And the feasibility of the project is verified compared to the required workspace.The research work has an important significance in the parallel mechanism for engineering practice.%紧密结合上海天文台65m射电望远镜副反射面位姿调整任务要求,提出采用并联式Stewart平台作为副反射面调整机构,基于天线主面和副面全位姿工作状态下各杆受力最优,并兼顾工作空间及避免杆件间干涉等因素,开展副面调整机构构型综合设计,获得了满足预期性能要求的机构构型参数,并求解出该构型下机构的工作空间,验证了构型参数综合设计方法的有效性.面向实际任务进行机构设计,研究内容对并联机构真正应用于工程实践具有重要的指导意义.