中文摘要：

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。

英文摘要：

A precise dynamic model of a novel attitude control actuator the fluidic ring actuator （FRA） was derived. Based on the practical factors of the flow in flow field, the variation of velocity caused by viscous was analyzed. The equivalent angular momentum of this novel actuator was deduced by integrating the velocity on every cross-section under the consideration of fluid properties. Then, the attitude dynamics of the spacecraft with three orthogonal FRAs was established. An attitude control law was designed according to the attitude dynamics of the spacecraft-FRAs system. Finally, simulation results demonstrate that the output torque has such advantages as fast reaction rate and small error by using the precise model of FRA. The application of the precise model of FRA makes the attitude control of a spacecraft more efficient and accurate.