30m望远镜三镜系统刚度分配与分析

发布时间：2018-05-14 11:40

本文选题：m望远镜 + 三镜系统　；参考：《光学精密工程》2016年01期

【摘要】：为满足30m望远镜(TMT)三镜系统(M3S)对质量和刚度的要求,研究了合理分配该系统各部分刚度的方法。针对M3S的第一阶谐振频率不小于15Hz的要求,本文基于M3S的结构组成对模型进行适当地简化,然后使用前期设计数据建立了四质量点弹簧-质点模型。研究了三镜支撑系统支撑刚度的组成,使用特征值反解的方法得到了简化模型在6个广义方向上的刚度矩阵。最后,给出了系统中所有弹簧代表的刚度,并将这一简化模型和计算结果用来指导后期的结构设计和控制设计。使用运动学仿真软件Adams对分配结果进行了验证,验证结果显示,M3S各部分刚度配比合理,系统的基频能够达到15.1Hz,满足设计要求。采用本文的刚度分配方法,可以有效地提高系统设计的效率与合理性。
[Abstract]:In order to meet the requirement of mass and stiffness of the 30 m TMT3 mirror system, the method of reasonably distributing the stiffness of each part of the system is studied. In view of the requirement that the first resonant frequency of M3s is not less than 15Hz, this paper simplifies the model appropriately based on the structure of M3s, and then establishes a four-point mass-mass model using the pre-design data. The composition of the bracing stiffness of the three-mirror bracing system is studied and the stiffness matrix of the simplified model in six generalized directions is obtained by using the inverse eigenvalue method. Finally, the stiffness of all springs in the system is given, and the simplified model and calculation results are used to guide the later structural design and control design. The kinematics simulation software Adams is used to verify the allocation results. The results show that the stiffness ratio of each part of M3S is reasonable, and the fundamental frequency of the system can reach 15.1 Hz, which meets the design requirements. The efficiency and rationality of the system design can be improved effectively by using the stiffness distribution method in this paper.
【作者单位】：长春理工大学高功率半导体激光国家重点实验室;中国科学院长春光学精密机械与物理研究所;
【基金】：国家自然科学基金资助项目(No.11403022) 中国科学院三期创新工程重大专项资助项目(No.Y3J32GE130)
【分类号】：TH743

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