控制力矩陀螺微振动时的固有频率波动机理研究

Study on mechanism of natural frequency fluctuation of CMG during micro-vibration

  • 摘要: 为了解控制力矩陀螺(CMG)与蜂窝板的共振机理从而指导微振动地面试验,建立了一个蜂窝板上CMG的等效动力学模型。通过等效板理论和薄板理论推导蜂窝板刚度矩阵的半解析解;结合随框架角变化的CMG惯量矩阵和陀螺矩阵获得CMG固有频率及其波动的变化规律。并提出控制力矩陀螺的设计建议,以期为CMG的地面试验设计提供理论支撑和指导意见,解决CMG与蜂窝板的共振问题。

     

    Abstract: In order to understand the resonance mechanism between the control moment gyroscope (CMG) and the honeycomb panel to guide the micro-vibration ground tests, an equivalent dynamic model of CMG on honeycomb panel was established. A semi-analytical solution of the stiffness matrix of honeycomb panel was derived by the equivalent plate theory and thin plate theory. By combining the CMG inertia matrix and gyroscopic matrix, which vary with the frame angle, the variation pattern of the CMG natural frequency and its fluctuation were obtained. The design suggestion for the CMG was proposed in order to provide theoretical support and guidance for the ground test design of CMG, as well as solve the resonance problem between CMG and honeycomb panel.

     

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