基于柔性结构的视轴减振稳定框架设计

Visual axis vibration damping stability frame design based on flexible structure

  • 摘要: 随着光电平台对视轴稳定精度要求的不断提升,传统两轴四框架稳定结构已经不能满足平台需求,由于其中的转动轴系、驱动电机,减振机构以及自身结构强度等诸多因素限制,导致“光学负载”越大,转动轴系越多,万向架体积和重量越大。因此,本文通过在光电平台内环框架的质心两边分别对称布置8个相同的柔性减振连接方式,提出了一种新型视轴减振稳定框架设计。通过Ansys仿真软件对减振稳定框架的模型进行了模态仿真与静力学分析,并利用NX、ADAMS联合仿真对设计框架的稳定性能进行了有效评估,最后,利用扫频测试系统分别对刚性连接与柔性减振连接框架进行动态性能测试。测试结果表明:该视轴减振稳定框架能够对光电平台提供中、低频隔振以及静态支撑功能,进而使光电平台的稳定性和抗干扰能力有所提升。

     

    Abstract: With the continuous improvement of the optoelectronic platform's requirements on the stability accuracy of the visual shaft, the traditional two-axis and four-frame stable structure no longer meets the need of the platform. Due to the limitations of rotating shafting, driving motor, vibration damping mechanism and its own structural strength and other factors, the larger the optical load, the more the rotating shafting, and the larger the volume and weight of the universal frame. Therefore, a new type of visual axis vibration damping stability frame design by placing 8 identical flexible vibration damping connection modes symmetrically on both sides of the center of mass of the inner ring frame of the photoelectric platform was proposed. The modal simulation and static analysis of the framework model were carried out by Ansys simulation software, and the stability performance of the design framework was evaluated effectively by NX and ADAMS co-simulation. Finally, the dynamic performance of the rigid connection and the flexible vibration damping connection frame was tested by the sweep frequency test system. The results show that the frame can provide vibration isolation and static support for the optical platform at low and medium frequency, and thus improving the stability and anti-interference ability of the optical platform.

     

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