柔性隔振结构影响下控制力矩陀螺的动力学建模与仿真#br#

近年来，控制力矩陀螺逐渐广泛应用于航天器姿态控制中.为了减小动量轮的高速旋转引起的振动对星体的影响，需要在控制力矩陀螺于航天器之间安装隔振装置.但是隔振装置的引入对控制力矩陀螺内部机构的动力学特性造成了影响.基于此，本文建立了柔性隔振机构耦合作用下的控制力矩陀螺动力学模型.本文通过欧拉角变换建立了陀螺内部各机构的运动学关系，使用能量方法建立了陀螺内部各结构的动力学特性.并在Matlab中进行了数值仿真与分析.通过仿真发现了隔振结构对陀螺的输出力矩产生了影响，在柔性支撑下的陀螺力矩存在明显波动，且波动范围随动量轮转速的增加而增加.同时，柔性隔振机构的引入还导致了干扰力矩的产生，该干扰力矩对控制力矩陀螺框架电机的控制存在较大影响.

Dynamic Modeling and Analysis of the CMG Considering the#br# Influence of the Vibration Isolator#br#

Recently, the control moment gyroscopes have been widely used in spacecraft attitude control. In order to reduce the influence of the vibration caused by the high speed momentum wheel, a vibration isolation device is introduced. However, vibration isolating device has an effect on the dynamic characteristics of the internal mechanism of the control torque gyroscope. This paper establishes a dynamic model of the control moment gyroscope with the influence of the flexible vibration isolation mechanism. The kinematic relationship is established by Euler angle transformation, and the dynamic characteristics are established by using the energy method. Numerical simulation and analysis are carried out in Matlab. It is found that the vibration isolation structure has an influence on the output torque of the gyroscope. The gyro moment under the flexible support has obvious fluctuation, and the fluctuation range increases with the increase of the rotational speed of the momentum wheel. At the same time, the flexible vibration isolation mechanism also generates the disturbance torque, which has a great influence on the control of the frame motor.