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为能够给星上有效载荷提供一种超静环境,提出一种星上控制力矩陀螺群(CMGs,Control Moment Gyroscopes)的隔振方案,并对所使用的隔振平台的动力学特性进行研究分析.首先介绍了不同参数模型的隔振元件工作原理和参数特性;其次利用牛顿-欧拉法对含有隔振平台和CMGs的卫星进行动力学建模;最后通过频域和时域的方法分析并对比了各个参数模型下的隔振平台力衰减特性以及对星体姿态稳定度的改善程度.结果表明:两参数加调谐质量阻尼器模型下的隔振平台对共振峰值有一定的衰减作用,三参数模型下的隔振平台在力衰减和对姿态稳定度的改善程度上要明显优于其他2种模型.
In order to provide an ultra-quiet environment for payloads on the satellite, a vibration isolation scheme of CMGs (Control Moment Gyroscopes) is proposed and the dynamic characteristics of the vibration isolation platform used are studied. Firstly, the working principle and parameter characteristics of the vibration isolation elements with different parameter models are introduced. Secondly, the dynamics of the satellite with the vibration isolation platform and CMGs are modeled by Newton-Euler method. Finally, the frequency and time domain methods are used to analyze and The force attenuation characteristics of the vibration isolation platform under various parameters and the improvement of the attitude stability of the stars are compared.The results show that the vibration isolation platform under the two-parameter plus tuned mass damper model attenuates the resonance peak to a certain degree, The vibration isolation platform under the model is obviously better than the other two models in terms of force attenuation and attitude stability improvement.