基于ARM芯片的船载卫星通信地球站天线控制器的设计与实现

发布时间：2018-03-09 21:13

本文选题：船载卫星通信地球站　切入点：嵌入式系统　出处：《南京邮电大学》2013年硕士论文　论文类型：学位论文

【摘要】：由于我国的海域辽阔，建立有线的通信网络成本过高、周期过长而难以实现，因此在海上覆盖有线网络不切实际。随着近年来卫星通信技术快速发展，在海船上安装动中通移动通信终端，通过借助地球同步卫星建立海上盲区通信链路，满足了军事、民用等海上通信的迫切需要，因此船载天线的存在对海上通信存在巨大意义。在海上航行中，，由于地理位置与环境的变化、船的航向改变以及船体的摇摆带来的扰动，导致船载卫星通信地球站波束中心的方向偏离通信卫星，地球站接收和发送的卫星信号不能达到最优的状态，甚至可能出现通信中断的情况。与大型固定站与便携站不同的是，船载卫星通信地球站的开发必须隔离载体扰动，使天线波束中心始终对准通信卫星。近年来随着嵌入式技术的飞速发展，ARM32位嵌入式RISC处理器以其低功耗、低成本、高性能的特性，在嵌入式系统应用领域占据领先地位。本课题主要是把原有的船载卫星通信地球站从基于单片机的控制平台升级为基于ARM9芯片的平台，从三方面进行了研究：一，基于ARM9的硬件电路设计，主要介绍了系统的各个模块芯片、器件的选择与电路设计；二，搭建嵌入式ARMLinux的开发平台，根据平台需要移植bootloader、linux内核、驱动以及构建根文件系统等；三，根据船载卫星通信地球站系统要求编写伺服控制程序，并介绍程序的执行过程。此课题的目标是让该控制系统实现驱动各路电机转动，通过各传感器数据采集并反馈给系统，实现船载卫星通信地球站的自动对星与稳定跟踪。目前该系统已设计完成，实现了控制系统的升级。
[Abstract]:Because of the vast sea area of our country, the cost of establishing the wired communication network is too high, the period is too long and it is difficult to realize it, so it is impractical to cover the wired network at sea. With the rapid development of satellite communication technology in recent years, The installation of mobile communication terminals on board ships, and the establishment of maritime blind area communication links by means of geostationary satellites, meet the urgent needs of military, civilian and other maritime communications. Therefore, the existence of shipborne antenna is of great significance to maritime communication. In maritime navigation, due to the change of geographical position and environment, the ship's course changes and the disturbance caused by the ship's swaying. As a result, the direction of the beam-center of the shipborne satellite communication earth station deviates from the communication satellite, the satellite signal received and transmitted by the earth station cannot reach the optimal state, and even the communication may be interrupted. Unlike the large fixed station and the portable station, it is different from the large fixed station and the portable station. In the development of shipborne satellite communication earth station, the carrier disturbance must be isolated so that the antenna beam center is always aligned with the communication satellite. In recent years, with the rapid development of embedded technology, ARM32-bit embedded RISC processor is characterized by its low power consumption, low cost and high performance. This subject is to upgrade the original shipborne satellite communication earth station from the control platform based on SCM to the platform based on ARM9 chip. The hardware circuit design based on ARM9 mainly introduces each module chip, device selection and circuit design of the system. Secondly, the development platform of embedded ARMLinux is built, the kernel of bootloader Linux is transplanted according to the platform requirement, the driver and the root file system are built. Thirdly, the servo control program is written according to the requirements of shipborne satellite communication earth station system, and the execution process of the program is introduced. The goal of this project is to make the control system drive all kinds of motor rotation, collect and feed back to the system through the data of each sensor, realize the automatic tracking of satellite communication earth station on board the ship, the system has been designed and completed at present. The upgrade of control system is realized.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN828.5;TP368.12

【参考文献】