卫星抖动对激光干涉测量影响的仿真分析  

Simulation Analysis of Influence of Satellites Jitter on Measurement of Laser Interferometer

作　　者：王璐钰 李玉琼[3] 蔡榕 WANG Lu-yu;LI Yu-qiong;CAI Rong(Aerospace Information Research Institute of Chinese Academy of Sciences,Beijing 100094,China;School of Aeronautics and Astronautic,University of Chinese Academy of Sciences,Beijing 100040,China;Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学航空宇航学院,北京101408 [3]中国科学院力学研究所,北京100190

出　　处：《计算机仿真》2022年第9期45-48,78,共5页Computer Simulation

基　　金：国家自然科学基金(61575209);中国科学院青年创新促进会(2018024);中国科学院战略重点研究计划(XDB23030200,XDA17020103)。

摘　　要：针对“太极计划”中由卫星抖动引起的影响激光干涉测量精度的两个主要噪声:激光指向抖动噪声、光程倾斜(tilt-to-length, TTL)耦合噪声,仿真分析了这两个噪声的抑制水平。采用差分波前传感技术,结合激光指向抖动噪声抑制系统的物理图像,求解了系统中各功能模块的传递函数,构造了抑制激光指向抖动噪声的Simulink仿真系统;针对TTL中常用的凹凸透镜组合技术手段,首次设计了由双凸透镜组成的4?成像系统,并采用MATLAB程序计算分析了TTL耦合噪声水平。仿真结果表明,激光指向抖动噪声、TTL耦合噪声抑制效果均优于“太极计划”的要求,且4?成像系统具有设计调控简便、精度高、易操作等优点。Aiming at the two main noises that affect the accuracy of laser interferometer caused by satellites jitter in the "Taiji mission" : laser pointing jitter noise and tilt-to-length(TTL) coupling noise, the simulations analyzed the suppression levels of these two noises. Using differential wave-front sensitivity technology, combined with the physical image of the laser pointing jitter noise suppression system, the transfer function of each functional module in the system was solved, and a Simulink simulation system that suppressed the laser pointing jitter noise was constructed;for the common technical means of concave-convex lenses combination in TTL,a 4? imaging system composed of biconvex lenses was designed for the first time, which used MATLAB program to calculate and analyze the TTL coupling noise level. The simulation results show that the suppression effects of laser pointing jitter noise and TTL coupling noise are better than the requirements of "Taiji mission",and the 4? imaging system has the advantages of simple design and control, high precision, and easy operation.

关 键 词：激光干涉 激光指向抖动噪声 光程倾斜耦合噪声 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]