【作者】 蔡阿宁；

【导师】 胡方明； 闫剑虹；

【作者基本信息】 西安电子科技大学 ， 电子与通信， 2007， 硕士

【摘要】 卫星通信以其覆盖地域广、通信容量大、性能稳定可靠、抗干扰能力强等特点,在军事通讯及民用通讯领域中得到了广泛的应用,而车载天线移动通讯系统由于具有移动特性,广泛应用于各种应急情况或突发事件中,并且在某些特殊行业和边远地区有着非常重要的用途。本课题针对国内以往车载天线移动通讯系统大多不具备自动找星并跟踪的功能,且人工对星耗时较长,很难适应突发事件需要的缺点,研制出一套既能够快速自动对星跟踪,又具有低成本、高可靠性特性的车载天线移动通讯系统,并重点研究了车载天线伺服控制技术。本文的主要研究成果如下:介绍了车载天线移动通讯系统的研究背景及该系统在国内外的发展状况;阐述了卫星轨道的基本要素,介绍了轨道预报中常用的几种坐标系,并给出了观测站观测卫星的角度计算方法;研究了车载天线伺服跟踪系统的系统组成及配置,并在保证通讯功能及性能要求的情况下,对系统配置进行优化,尽量降低成本,提高系统的集成度;从硬件和软件两方面对系统的可靠性、安全性设计做了重点研究,确保系统在野外的可靠运行;进行了天线关键跟踪技术的研究及扫描仿真研究,并对扫描策略的性能作了验证和比较;开发控制软件,实现电机的控制、天线的扫描及极值跟踪、自跟踪等功能;完成了系统工程化实现,并完成系统测试;给出了9020T型天线系统伺服控制单元的介绍;进一步讨论了动中通通讯模式的技术实现,提出了动中通车载天线移动通讯系统的研究方向。更多还原

【Abstract】 Vehicular mobile antenna communication system features in mobility and it has been widely used for emergency or contingency, especially in some industries and remote areas. This subject focuses on the defects of domestic used vehicular mobile antenna systems which have no auto scanned and tracked, long time required for manual acquiring, which are not suitable for emergency or contingency. The subject also provides a low cost and highly reliable solution for vehicular mobile antenna communication system with fast auto acquainting and tracking to the satellite. The primary research production includes: Introducted the development of the vehicular mobile antenna communication system. Research on the build up and configurations of the system, realized configurations optimization, cost reduction and integration improvements depend on communication and performance has been ensured. Key research on reliability and safety on both hardware and software to be ensured the reliable operations under filed conditions. Completed the scanning simulation and verifications, and the comparisons of the scan strategy. Developed control software and realized motor control, signal scanning, signal tracking and auto tracking. Completed the engineering and debugging of the system. Provided the introduction of The 9020T Antenna System Control Unit. Discussed the technical realization of the moving system.更多还原