65米射电望远镜天线并联式副面调整机构动力学仿真研究  

Study on Dynamics Simulation of Parallel Adjusting Mechanism for Sub-reflector of 65m Antenna

作　　者：李建军[1] 段艳宾[1] 曾达幸[2] 赵永生[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,石家庄050081 [2]燕山大学机械工程学院,秦皇岛066004

出　　处：《系统仿真学报》2014年第5期1040-1046,1070,共8页Journal of System Simulation

基　　金：国家自然科学基金(51005195)

摘　　要：根据65米射电望远镜天线副反射面调整机构的具体设计尺寸,提出采用并联式Stewart平台作为副反射面调整机构,以三维造型软件Pro/E、机械系统动力学仿真软件MSC.ADAMS和计算仿真软件Matlab进行联合仿真,对副面调整机构进行了虚拟样机建模和动力学仿真,得出机构所有运动关节摩擦中影响驱动力矩最主要的关节摩擦力,为机械结构优化设计提供了依据;针对调整机构的特殊应用场合,得到了机构在定平台随天线主面0°至90°运动,且动平台在要求工作空间内运动时的实际工况下,副面在全姿态工作时各分支杆的受力情况,仿真结果对调整机构的设计校核起到了重要作用。面向实际任务进行机构仿真,研究内容对并联调整机构真正应用于大型天线工程实践具有重要的指导意义。According to the specific design dimensions of parallel adjusting mechanism for the sub-reflector of 65m antenna, the Stewart platform as the Shanghai 65 m radio telescope antenna sub-reflector adjustment system was proposed. With three-dimensional modeling software Pro/E, the mechanical system dynamics simulation of MSC.Adams and computing software Matlab co-simulation, the virtual prototype model and the dynamics simulation of the adjusting mechanism were completed. The most important joint friction which affected the driving torque was found out form all the joints friction. That provides the basis for the mechanical structure optimization design. According to the actual working status of the antenna sub-reflector adjusting mechanism, the fix platform with the antenna main surface revolve form 0° to 90°, the load of the parallel adjustment at working status was analyzed. The force of the rod was calculated under various circumstances. The simulation result of the adjusting mechanism has played an important role for design check. The contents possess theoretical significance and engineering value for the development of the adjusting mechanism for the sub-reflector of antenna.

关 键 词：65米射电望远镜 天线副反射面调整 并联机构 联合仿真 动力学 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]