空间光通信ATP系统的复合控制方法  

Multiple control method of ATP system for space optical communication

作　　者：左韬[1,2] 艾勇[1] 黄海波[1] 苏贵波[1,3] 郭建中[1] 

机构地区：[1]武汉大学电子信息学院 [2]武汉科技大学信息科学与工程学院 [3]中国人民解放军61491部队

出　　处：《红外与激光工程》2011年第1期107-111,共5页Infrared and Laser Engineering

基　　金：湖北省教育厅科学技术研究项目(Q20092301)

摘　　要：给出了空间光通信ATP复合控制系统的组成框图,建立了粗跟踪和精跟踪的数学模型,并通过仿真推导了精跟踪和粗跟踪系统的复合控制算法。针对粗跟踪系统的传输特性,采用Smith预估器来补偿转台的机械滞后,使系统的响应速度明显加快;根据精跟踪系统的传输特性和PZT的迟滞特性,采用了不完全微分PID算法的控制策略;为进一步降低精跟踪的动态误差,采用前馈补偿控制来补偿稳态误差,使得精跟踪误差曲线更加平滑。进行了1.2 km的空间光通信信标光跟踪实验,在复合控制下,信标光被稳定在较小的视场内从而满足通信的要求,实验结果验证了控制策略的有效性。The block diagram of ATP multiple control system in space optical communication was presented, and the mathematical model of fine and coarse tracking module were established. Moreover, the multiple control algorithm of fine and coarse tracking systems was derived and emulated. Considering the transmission characteristic of coarse tracking system, the Smith predictor was used to compensate mechanical time-delay of rotating floor which made the system respond more quickly. Control policy based on partial differential PID algorithm was adopted according to the transmission characteristic of fine tracking system and the PZT time-delay. To reduce the dynamic error of fine tracking further, the feed- forward compensation was applied to compensate steady state error which made the error curve of fine tracking more smooth. At last beacon tracking experiment was conducted in 1.2 km space optical communication. The beacon was confined in a small field of view and satisfied the requirement of communication. The experimental results imply the validity of control policy.

关 键 词：ATP 滞后 SMITH预估器 前馈补偿 

分 类 号：TN929.1[电子电信—通信与信息系统]