深空大口径天线前向反馈型伺服系统设计  

Design of Feed Forward Controller for the Servo System of Large Dish Deep Space Antennas

作　　者：何国龙[1] 李国民[1] 黄英[1] 刘敏[1] 

机构地区：[1]北京跟踪与通信技术研究所

出　　处：《飞行器测控学报》2010年第5期25-28,共4页Journal of Spacecraft TT&C Technology

摘　　要：目前深空大口径天线伺服系统多采用传统的比例积分型控制模式,它在跟踪低速运动目标时可以满足任务要求,但在跟踪高速运动目标时会产生较大的指向误差。通过在伺服系统中引入前向反馈控制器,天线的反应速度和指向精度等多方面系统性能都得到了有效提升。仿真结果表明,加入前向反馈控制器后,伺服系统的闭环性能得到了极大优化,指令捕获时间有效缩短,高速跟踪时指向误差显著降低。Traditional deep space large dish antennas use Proportional & Integral(PI) controller,which performs well in tracking slow spacecraft,but has poor pointing accuracy when tracking a fast-moving spacecraft.To meet required accuracy,this paper introduces Feed Forward(FF) controller to upgrade the servo system and improve antenna pointing accuracy.Simulation results show that FF controller improves the performance of closed-loop transfer function,efficiently expands servo system's bandwidth and shortens the setting time in acquisition command,and the pointing accuracy in fast tracking command is significantly improved.

关 键 词：深空大口径天线 伺服系统 前向反馈控制器 捕获时间 指向误差 

分 类 号：TN820.3[电子电信—信息与通信工程]