摘要
光电经纬仪转台的动态特性对经纬仪瞄准与跟踪性能有重要影响。针对某型号经纬仪展开研究,基于3D Solid单元建立了有限元模型,采用Bathe子空间迭代法对转台进行了模态分析,获取了转台前6阶模态。进行了力锤激励模态测试实验,仿真结果与实验结果误差在12%以内。基于隐式积分法对经纬仪进行了扫频分析,结果表明,该型号经纬仪转台对350 Hz激励最为敏感。研究结果为经纬仪转台结构改进提供了指导,并为控制系统的带宽设计提供了依据。
The dynamic characteristics of the turntable of opto-electronic theodolite have an important influence on point and track performance of the theodolite.The finite element model of a specific theodolite turntable was established based on the 3D-solid element.Bathe subspace iteration method was used for modal analysis and the first six modes were achieved.Hammer excitation modal test experiment was done and the error between analysis results and experimental results was within 12%.Swept-frequency analysis was done based on the implicit time integration method and the results indicated that the theodolite turntable was most sensitive with the 350Hz excitation.The study results can provide reference for the structural optimization and basis for design of bandwidth of the control system.
作者
邹冀
伞晓刚
李耀彬
高世杰
ZOU Ji;SAN Xiao-gang;LI Yao-bin;GA0 Shi-jie(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences, Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2019年第1期93-98,共6页
Laser & Infrared
基金
国家自然科学青年基金项目(No.51605465)资助
关键词
转台
动态特性
Bathe子空间迭代法
隐式积分
力锤模态实验
扫频分析
turntable
dynamic characteristic
Bathe subspace iteration method
i mplicit time integration
hammer excitation modal experiment
swept-frequency analysis
