针对大口径望远镜由于自身尺度的增加以及钢桁架结构所带来的阻尼不足的情况, 开展了大口径望远镜阻尼调制技术的研究, 提出了一种基于动力学模型的调制质量阻尼器的设计方法。首先分析了现有的大口径望远镜的阻尼调制策略, 选择了使用专门的阻尼调制器的解决方案; 之后, 研究了建立系统动力学缩减模型以及基于该模型的动力学检测方法, 为阻尼调制器的设计打下基础。最后, 设计了适应某大口径望远镜主镜模态的调制质量阻尼器。为验证文中的正确性, 针对一阶固有频率为172 Hz实验系统进行了阻尼调制实验, 使用调制质量阻尼器后, 该频率所对应的响应有明显的下降。同时, 对于用于验证的大口径望远镜, 计算得到其141 Hz的主镜模态对应的调制质量阻尼器质量为7.015 kg。刚度为5.506 N/mm。提出了一种基于动力学模型的调制质量阻尼器的设计方法。分析了现有大口径望远镜的阻尼调制策略, 选择了使用专门阻尼调制器的解决方案, 不仅可指导下一代望远镜的建设工作, 还可以对现有设备进行有效的升级。

To comprise the light damping performance of the large aperture telescope due to the growing dimension and usage of steel truss, the tuned damping technique was discussed here and a quick approach of Tuned Mass Damping(TMD) would be presented. First and foremost, after being compared with traditional damping strategy, the special damping instrument was chosen as the solution. And then, using dynamic integration method, the simplified model was built to describe the fundamental motion of a large telescope under test. Lastly, according to this large telescope, the TMD was designed to suppress the shifting of the main mirror. Additionally, a testing system with first order natural frequency of 172 Hz was experimented, the response corresponding to frequency was declined after adding the TMD and the TMD for main mirror whose first natural frequency at 14 Hz in the large telescope was designed as 7.015 kg in mass and 5.506 N/mm in stiffness. Hence, a design method based on dynamical model deducing was investigated. Considering the current large telescope damping targets, the TMD was chosen to tune the dynamical response of large telescope. TMD not only contributes to construction of next generation large telescope, but also is a convenient method to update the old ones.