卫星遥感器微振动隔离用液体阻尼隔振器

Vibration isolator with relaxation type damping for micro-vibration isolation from satellite remote sensors

针对卫星平台的微振动,提出了具有良好高频衰减及共振峰控制性能的松驰型液体阻尼隔振器。建立了松弛型液体阻尼隔振模型,从传递率的角度分析了提出的松驰型液体阻尼隔振器与传统隔振模型的区别。使用波纹管提供刚度及密封,基于小孔阻尼结构形式,设计了松弛型液体阻尼隔振器并求解了系统的阻尼因子。对所设计的隔振器进行了传递率测试,结果表明,松弛型液体阻尼隔振器在共振频率处能够提供大阻尼,将共振放大倍数控制在2倍以内;在高频隔振区能提供小阻尼,100Hz衰减率超过95%,隔振性能优于传统隔振器。得到的结果和理论预测吻合较好。该项研究对松弛型液体阻尼隔振器的设计以及其在遥感器微振动隔离的应用上具有很强的指导作用。

A vibration isolator with relaxation type damping was proposed for micro-vibration isolation from satellite remote sensors to get better high frequency attenuation rate as well as the resonance control capacity.A vibration isolation model of the relaxation type viscous damping was established.The absolute transmissibility of the vibration isolator model with relaxation type damping was deduced and compared with that of a traditional Kevin vibration isolation model.The vibration isolator with relaxation type damping was designed by adopting a bellow as spring and an elongated hole to generate damping force.The damping coefficient was solved analytically for the designed structure.The transmissibility experiment for the vibration isolator was conducted.According to the experimental results,it shows that the vibration isolator with relaxation type damping provides a high damping force at the resonance frequency,which controls resonance amplification factor to be with two times.Moreover,it provides a low damping force at the higher frequency,which allows the vibration attenuation at 100 Hz to be over 95%.These results are identical to that of the theoretical prediction and demonstrate that the performance of proposed Vibration isolator is superior to that of traditionalones.The research on vibration isolator with relaxation type damping can be as a good instruction to design and apply such kind of vibration isolator in satellite remoter vibration isolation fields.