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支撑组件作为连接空间相机与卫星的部件,应具有多重功能,以适应相机运载和空间应用的需求。动力学设计应满足相机与卫星平台的共振频率错开,避免共振,并尽量降低响应幅值。为实现这一目标,建立支撑组件与空间相机的两自由度振动模型,改变支撑组件的刚度和阻尼,观察相机响应的变化规律。结果表明,支撑件的刚度对空间相机整机的共振频率起决定性的作用,较大的阻尼能在一定程度上降低共振幅值。根据模型的指导,提高阻尼系数有利于减小响应幅值,选择将支撑组件中的部分零件使用阻尼合金。试验表明,空间相机各方向上的共振频率在可用范围内,共振幅值降低了15%以上。
As a component that connects space cameras and satellites, support components should have multiple functions to meet the needs of camera delivery and space applications. Kinematic design should meet the camera and satellite platform resonant frequency staggered, to avoid resonance, and try to reduce the response amplitude. In order to achieve this goal, a two-degree-of-freedom vibration model of support component and space camera is established. The stiffness and damping of the support component are changed and the variation of camera response is observed. The results show that the stiffness of the supporting member plays a decisive role in the resonance frequency of the space camera. Larger damping can reduce the resonance amplitude to a certain extent. According to the guidance of the model, increasing the damping coefficient is beneficial to reduce the response amplitude, and choosing to use damping alloy for some parts in the support assembly. Experiments show that the spatial frequency of the camera in all directions within the available range, the amplitude of the resonance reduced by more than 15%.