航天器工程2026，Vol.35Issue(1)：8-15,8.DOI:10.3969/j.issn.1673-8748.2026.01.002
应用简化LADRC的卫星激光通信链路跟踪精度优化研究
Research on Tracking Accuracy Optimization of Satellite Laser Communications Link Using Simplified LADRC
杨清龙 1张宸博 2姜诗琦3
作者信息
- 1. 中国空间技术研究院通信与导航卫星总体部,北京 100094
- 2. 北京大学,北京 100091
- 3. 中国航天电子技术研究院,北京 100094
- 折叠
摘要
Abstract
To address the limitation that conventional fine-tracking control algorithms deployed onboard satellite cannot substantially enhance the disturbance-rejection capability of pointing,ac-quisition,and tracking(PAT)system,a simplified linear active disturbance rejection controller(simplified LADRC)is adopted to optimize the tracking performance of satellite laser communi-cations link.The controller inherits the core idea of disturbance estimation through a linear ex-tended state observer(LESO)while substantially simplifying the components of the active dis-turbance rejection controller(ADRC).As a result,only 25 basic operations are required per in-put sample,making the controller well suited for implementation on relatively low-speed onboard electronic system.Through simulation experiments,the effectiveness of the simplified LADRC in improving tracking accuracy is verified.In presence of medium-and high-frequency vibrations commonly encountered in link-tracking scenarios,the simplified LADRC reduces the root-mean-square(RMS)tracking error from 2.12μrad under conventional proportional-integral-differential(PID)control to 0.92μrad,achieving a performance improvement of 57%.To address the"creep"phenomenon encountered in link-tracking operations,the simplified LADRC reduces the peak tracking error from 3.0μrad to 0.5μrad,corresponding to an 83%improvement in accuracy.The simplified LADRC requires a number of tuning parameters comparable to that of convention-al linear controllers,with low parameter-adjustment complexity.It can therefore significantly en-hance link-tracking accuracy,effectively mitigating the influence of satellite platform disturb-ances on the communications link and improving overall link stability.关键词
卫星激光通信/瞄准、捕获和跟踪系统/复合轴系统/简化线性自抗扰控制器/跟踪精度Key words
satellite laser communications/PAT system/compound-axis system/simplified LADRC/tracking accuracy分类
信息技术与安全科学引用本文复制引用
杨清龙,张宸博,姜诗琦..应用简化LADRC的卫星激光通信链路跟踪精度优化研究[J].航天器工程,2026,35(1):8-15,8.
