结构因素对遥感天线跟踪精度影响分析及对策  

Analysis and Solutions of the Influence of Structural Factors on TrackingAccuracy of Remote Sensing Antennas

作　　者：乔建江[1] 王宝宝 张冰[1] 张少辉[1] 于卫东[1] QIAO Jianjiang;WANG Baobao;ZHANG Bing;ZHANG Shaohui;YU Weidong(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Shijiazhuang Military Representative Office of the Military Representative Bureau of the EquipmentDepartment of the Aerospace System Center,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]航天系统部装备部军事代表局驻石家庄地区军事代表室,河北石家庄050081

出　　处：《无线电通信技术》2024年第1期213-218,共6页Radio Communications Technology

摘　　要：在遥感地面站天线设备中,跟踪精度是伺服控制系统的关键技术指标。重点分析影响跟踪精度的机械结构谐振频率、摩擦两个结构因素,给出了影响因素与天线跟踪误差之间的理论关系:天线机械结构谐振频率主要影响伺服动态滞后误差和高仰角跟踪性能;摩擦力矩主要影响跟踪随机误差和伺服低速跟踪平稳性能。给出了改善低速平稳性能的解决措施;提出了一种数字复合控制融合新型结构滤波器(数字凹口滤波器+一阶惯性环节)的动态跟踪控制方法,解决了窄波束天线机械结构谐振频率较低影响伺服跟踪性能的问题。测试结果表明,天线最低平稳运行速度达0.005 (°)/s,速度误差优于10%;天线加速度在0.393 (°)/s^(2)时,方位动态跟踪均方根误差优于0.006 2°。遥感地面站天线设计方法实用有效,为今后同类天线伺服控制系统设计提供了理论依据。For the antenna equipment of remote sensing ground stations,tracking accuracy is a key technical indicator of servo con trol systems.Structural factors such as resonance frequency and friction of mechanical structure that affect tracking accuracy are ana lyzed,and the relationship between the influencing factors and the antenna tracking accuracy is given.Theoretical relationship be twee n tracking errors:the resonant frequency of antenna mechanical structure mainly affects the servo dynamic hysteresis error and the high elevation tracking error traceability;the friction torque mainly affects the tracking random error and the servo low speed tracking stability performance.On this basis,a solution to improve low speed stability performance is proposed,and a digital composite control fu sion new structural filter(digital notch filter+inertia element)is proposed.The state tracking control method solves the problem that the low resonant frequency of the mechanical structure of the narrow beam antenna affects the servo tracking performance question.Test results show that the minimum stable operating speed of antenna reaches 0.005(°)/s,and speed error is better than 10%;the antenna ac celeration is 0.393(°)/s^(2),the azimuth dynamic tracking error reaches 0.0062°.The antenna design method for re mote sensing ground stations is practical and effective,providing a theoretical basis for the design of similar antenna servo control systems in the future.

关 键 词：结构谐振频率 摩擦 跟踪精度 凹口滤波器 

分 类 号：TN820.4[电子电信—信息与通信工程] TN823