ty -jour a2 -cervone，安吉洛·艾（Angelo au -bai -bai，zhengfeng au -zhao -zhao，jijun py -2020 da -2020/08/28 ti-卫星天线系统的动态特征研究研究3D Revolute Clearance SP -8846177 VL -2020 vl -2020 vl -2020AB-由于组合，制造错误和磨损，实际机制关节的间隙是不可避免的。双轴驾驶和定位机制是卫星天线实施精确指导和定位的一种空间致动机制。然而，在卫星天线系统的动态分析和控制中，通常假定卫星天线系统中的旋转接头是完美的，没有间隙，或者没有平面径向清除率不完美。但是，总是忽略了不完善的旋转关节中的轴向间隙。在这项工作中，旋转关节被认为是带有径向和轴向间隙的3D空间清除接头。提出了一种对3D旋转接头进行建模的方法，并提出了其在卫星天线系统中的应用。考虑到3D Revolute清除接头，研究了卫星天线系统的动力学建模和分析。首先，建立了3D Revolute清除接头的数学模型，并提出了径向和轴向间隙的定义。然后，分析了潜在的接触模式，接触条件和3D Revolute清除接头的接触检测。 Further, the normal and tangential contact force models are established to describe the contact phenomenon and determine the contact forces in the 3D revolute clearance joint. Finally, a satellite antenna system considering the 3D revolute clearance joint with spatial motion is presented as the application example. Different case studies are presented to discuss the effects of the 3D revolute clearance joint. The results indicate that the 3D revolute clearance joint will lead to more severe effects on the dynamic characteristics of the satellite antenna system. Therefore, the effects of axial clearance on the satellite antenna system cannot be ignored in dynamics analysis and design of the satellite antenna system. SN - 1687-5966 UR - https://doi.org/10.1155/2020/8846177 DO - 10.1155/2020/8846177 JF - International Journal of Aerospace Engineering PB - Hindawi KW - ER -