基于压电复合纤维(MFC)的太阳翼帆板振动主动抑制

Active Vibration Suppression of Solar Array Based on MFC

摘要: 航天器在太空中使用的俘能设备，基本上都是太阳能电池阵，虽然样式结构有所不同，但是基本都为板形结构。太空中的模态阻尼小，如果不采取措施对其振动进行抑制一旦受到某种激励力的作用，这些板形结构的小幅度振动要延续很长时间，这将会影响航天器正常工作。本课题主要研究的是太阳翼帆板的振动主动抑制。首先通过动力学建模确定了太阳翼帆板抑振系统的整体动力学方程，并利用hyperworks得到模型的振动各阶模态，再通过Labview编写反馈控制程序，设置PID调节参数，最后搭建实验模型，安装传感器/致动器，通过实际测试振动曲线和仿真进行对比，参考仿真控制参数，设置实际控制参数，对比仿真和实验的振动抑制效果。通过仿真和实验对比，可以看出，主动抑振系统能有效的抑制帆板的振动，特别是对帆板的微幅振动抑制效果明显。

Abstract: The energy capture devices used by spacecraft in space are basically solar array. Although the styles and structures are different, they are basically plate-shaped structures. The modal damping in space is small. If no measures are taken to suppress the vibration, the small amplitude vibration of these plate-shaped structures will last for a long time, which will affect the normal operation of spacecraft. In this paper, the active vibration suppression of solar array is studied. Firstly, the overall dynamic equation of the vibration suppression system of solar wing panel is determined by dynamic modeling, and the vibration modes of each order of the model are obtained by using HyperWorks. Then, the feedback control program is written by LabVIEW, and PID regulating parameters are set. Finally, the experimental model is built and the sensor/actuator is installed. The vibration curve is compared with the simulation, and the simulation control parameters are referred. Set the actual control parameters, and compare the vibration suppression effect of simulation and experiment. Through the comparison of simulation and experiment, it can be seen that the active vibration suppression system can effectively suppress the vibration of the sailboard, especially the micro amplitude vibration suppression effect is obvious.