Then , the tracking laws for the user satellites antenna pointing to the tdrs which is fit to the engineering application are derived , and the basic concepts of the user satellites antenna pointing control project are described in detail 2 .推导出了适合于工程应用的星间链路天线跟踪中继卫星的跟踪规律,详细的论述了星间链路天线指向控制策略。
To solve the problem that the frequency band is very tense in drss , it is very necessary to study how to use tcm in high - speed data communication systems , since tcm has an advantage of excellent utility of both frequency band and power 为了解决中继卫星高速数传中的频带利用率紧张的问题,研究将同时优化频带利用率和功率利用率的tcm技术与高速数传相结合的技术具有很迫切的实用价值。
This paper concludes the result of computer simulation of data relay satellite optical communication channel , playing a part of the system research of data relay satellite optical communication , and completed the theoretic analysis , modeling and simulation 本文给出数据中继卫星光通信链路计算机仿真研究结果，作为数据中继卫星光通信系统研究的一部分。论文完成了对数据中继卫星光通信链路的理论分析、建模和仿真工作。
The tdrss ( tracking and data relay satellite system ) is a system which can supply the data relay and tt & c ( telemetry tracking and command ) service for the aircraft which are low and middle earth orbit and other aircrafts , aircraft and earth station 跟踪与数据中继卫星系统tdrss ( trackinganddatarelaysatellitesystem )是为中、低轨道的航天器与航天器之间、航天器与地面站之间提供数据中继、连续跟踪与轨道测控服务的系统。
The antenna pointing control accuracy can satisfy the design specification and it is validated to be appropriate and effective . at last , the designed user satellites complex control system is simulated based on xpc target which is used for hardware - in - the - loop simulation 4 .基于xpc实时仿真平台,充分利用实验室条件,搭建了用户星天线样机在回路中的半物理仿真实验,将天线指向控制系统和星体姿态稳定控制系统联合起来,组成中继卫星复合控制系统进行近一步的验证。
First , the structure of the second generation ctdrs isl was discussed in this paper , the characteristic of coverage in the second generation ctdrs by the characteristic of orbit and the simulation model of isl was analyzed then the effect of the isl establishing process analyzed . second , the discussing and analyzing focus on the characteristic of signal during the establishing isl process , establishing the orbit model , the technology of doppler frequency shift capturing and tracking sequence and the effect of background noise , then the theory analyzing the parameters we have just mentioned , and this will support the reference for the implement of project . the simulation and test of the isl of ctdrs and analyzing from theoretical basis to implement of simulation were mainly focused in this paper 其中讨论了二代中继星捕获跟踪系统星间链路的仿真方案的组成结构,利用轨道特性对二代中继卫星系统的覆盖特性进行分析,搭建了星间链路的仿真模型,其中包括中继卫星和用户卫星在内的轨道模型、星间链路模型、用户星信号调制模型等,并对星间链路建立过程的影响进行分析;重点针对星间链路建立过程的信号特性,轨道模块的建立、多普勒频移技术、背景噪声影响、载波的捕获与跟踪技术等进行了实际参数的设计与理论分析。
Based on chinese tracking and data relay satellite ( ctdrs ) in the future , the antenna pointing control and complex control theory of user satellite are studied deeply in this dissertation , which is funded by the improve item of dept . of astronautic engineering and mechanics ? “ the teaching demonstration of antenna pointing control system in tdrss ” . the main contents of this dissertation are consisted of the following parts : firstly , dynamics equation is derived using lagrange equation for user satellite , so as the kinetics equations of user satellite at the same time are expressed in the form with matrix differential equations that is suitable for attitude control system design and analysis 本学位论文结合航空宇航科学与技术学科研究生教学基地实验室建设项目“中继系统星间链路天线指向控制系统教学与演示实验” ,以我国跟踪与数据中继卫星系统为背景,对某型号用户星星间链路天线指向跟踪控制和复合控制理论进行深入的研究,研究内容主要包括以下几个方面: 1 .利用lagrange方程建立了用户星的动力学方程,同时推导了运动学方程,并将这组动力学方程以矩阵微分方程形式表示,使之适用于姿态控制系统的设计和分析。
This paper presents the results of studies on collectivity scheme and some key technologies about the network - based navigation system which is composed by existing stations ( e . g . radio beacon ) , unmanned air vehicles ( e . g . relay uav ) , other air - tactical serving vehicles and data relay satellites 本文研究了利用地面现有台站(如无线电信标台)和移动站(如移动指挥车辆) 、空中无人机平台(如中继无人机)和其他空中战术服务平台、以及数据中继卫星等构成的网络化导航系统的总体方案和相关技术。
According to the technical requirements of data relay satellite system , we determine to exploit and analyze the oscillation amplitude comparison mono - pulse mode in a single channel mono - pulse , angular tracking manner in comparisons among several angular tracking modes e . g . cone scanning , step tracking , phase comparison mono - pulse and oscillation amplitude comparison mono - pulse 根据数据中继卫星系统技术指标与技术要求,通过比较圆锥扫描、步进跟踪、相位比较单脉冲与振幅比较单脉冲等跟踪方式的优、缺点,确定采用振幅比较单脉冲方式中的单信道单脉冲角跟踪方式,并对此跟踪方式进行了详细的研究。
The project ‘ simulation and test of the second generation ctdrs ’ was taken as the scientific research background in this paper , and the background and purpose of this project were taken as the leading line , the subject research present situation in the domestic and foreign were elaborated , the characteristic and advantages of isl ( inter - satellite link ) simulation design adopting stk ( satellite tool kits ) software , then the simulation results supported by matlab and stk were analyzed 本文以我国第二代中继卫星捕获跟踪( ctdrs )系统的预研项目“二代中继星捕获跟踪系统仿真及验证”为科研背景,以课题的研究背景与意义为主线,论述了课题在国内外的研究现状以及采用stk ( satellitetoolkit )完成星间链路仿真设计的特点与优势,并对stk和matlab的仿真结果进行了一定的分析。
