具有大型天线的卫星姿态大角度机动解耦控制

内容简介：为了解决卫星-天线系统的耦合动力学问题,利用一种三自由度驱动与测量机构连接天线臂与卫星平台并控制天线指向.通过该机构在卫星姿态控制系统中引入前馈控制来补偿反作用力矩,从而实现卫星平台与天线之间的解耦控制.在卫星姿态大角度机动条件下建立带有解耦机构的卫星-天线系统动力学模型.以该模型为基础设计姿态大角度机动的控制方案并进行仿真验证.仿真结果表明解耦控制方法将卫星姿态稳定度提高了两个数量级.解耦控制方法能大幅增加天线振动的阻尼,有效提高卫星稳定度.

Abstract：To solve the problem of dynamic coupling between satellite platform and antenna system,a three degree of freedom drive and measurement mechanism was utilized to interface antenna arm and satellite platform,and to control pointing of antenna.By this mechanism,the drive torque was fed forward into attitude control system to compensate reacting torque and realize decoupling control between satellite attitude and antenna pointing.Dynamic model of satellite platform and antenna with decoupled mechanism was established for large angle attitude maneuver.Using this model,large angle maneuver control law was designed and simulation was done for performance verification.Results demonstrate that the decoupling control approach could increase the stability of satellite attitude with two orders of magnitude.Decoupling control enhances vibration damping and improves satellite stability.

作者：葛升民, 王磊, 甘克力,

关键词：可展开天线, 大角度机动, 解耦控制, 卫星姿态控制,