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文章研究了新型姿态控制执行机构——射流动量控制器的精细动力学模型。基于流场内的流体特性,分析了粘性使流场速度衰减的规律,通过对流动面各点的速度积分,推导了与工质特性相关的执行机构等效角动量,得到了能够反映射流动量控制器内部特性的精细动力学模型。然后,建立了含有三正交构型射流动量控制器组的航天器姿态动力学模型,并依据该动力学模型设计了姿态控制律。仿真结果表明,依据射流动量控制器精细模型得到的执行机构输出力矩反应速度快、误差小,应用在航天器姿态控制的过程中提高了对航天器控制的效率和精度。
The article studies the fine dynamic model of the new attitude control actuator - jet momentum controller. Based on the fluid characteristics in the flow field, the law of viscosity attenuation of the flow field was analyzed. The equivalent angular momentum of the actuator related to working fluid properties was derived by integrating the velocity of each point on the flow surface. Fine Dynamics Model of Internal Characteristics of Volume Controller. Then, the spacecraft attitude dynamics model with three orthogonal configuration jet momentum controller is established, and the attitude control law is designed according to the dynamic model. The simulation results show that the output moment of the actuator obtained by the fine model of the jet momentum controller is fast and error-less, and the efficiency and precision of spacecraft control are improved during the attitude control of the spacecraft.