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satellite antenna system
相关语句
  卫星天线系统
     This paper describes a mechanically despun satellite antenna system for the domestic telecommunication service.
     叙述了为国内电信服务的机械消旋卫星天线系统.
短句来源
  “satellite antenna system”译为未确定词的双语例句
     Coupling Dynamic Analysis of a Hoop Truss Deployable Satellite Antenna System
     环形可展天线星线耦合动力学分析
短句来源
  相似匹配句对
     Satellite Receiving Antenna
     现代卫星接收天线
短句来源
     Debugging of satellite antenna
     卫星天线方向的调试
短句来源
     Satellite antenna stabilization system on moving vehicles
     动载体卫星天线稳定系统
短句来源
     Adaptive robust controller of mobile satellite antenna systems
     移动卫星天线的自适应鲁棒控制系统
短句来源
     DESIGN OF ANTENNA POINTING CONTROL SYSTEM FOR USER SATELLITE
     用户星天线指向控制设计初探
短句来源
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  satellite antenna system
The most important parameters in a satellite antenna system are G/T, cross polarity performance and side lobe performance.
      


This paper describes a mechanically despun satellite antenna system for the domestic telecommunication service. The antenna system consists of three parts: an assembly of the omnidirectional telemetry and command antennas, a directive communications antenna and a three channel noncontacting rotary joint. The telemetry and command antennas are antennas, the radiation patterns of which are omnidirectional patterns with the circular polarization. The directive communications antenna...

This paper describes a mechanically despun satellite antenna system for the domestic telecommunication service. The antenna system consists of three parts: an assembly of the omnidirectional telemetry and command antennas, a directive communications antenna and a three channel noncontacting rotary joint. The telemetry and command antennas are antennas, the radiation patterns of which are omnidirectional patterns with the circular polarization. The directive communications antenna is a offset elliptical paraboloid antenna with single horn feed for both transmiting and receiving. A 5°×8° elliptical beam radiated by the paraboloid antenna provides proper coverage over China's mainland. The three channel noncontacting rotary joint is a concentric three coaxial line configuration, which forms three transmission channels. There are chokes at the rotary join of each coaxial line. The channel insertion losses of the rotary joint are 0.6~0.8dB. The isolations between the channels are greater than 50dB.

叙述了为国内电信服务的机械消旋卫星天线系统.该天线系统包括三部分:全向遥测遥控天线组件,定向通信天线和三信道无接触旋转关节.遥测遥控天线为双圆盘天线,辐射全向性方向图,圆极化.通信天线是收发共用单喇叭馈源偏置椭圆抛物面天线,辐射一个5°×8°的椭圆波束,恰好覆盖中国本土.三信道无接触旋转关节是一个同心三同轴线结构,形成三路传输信道.各同轴线旋转连接处有扼流槽.各信道的插入损耗为0.6~0.8dB,信道之间隔离优于50dB.

A system control scheme based on attitude measuring unit is presented,which applied in ship-borne satellite antenna system.Three-axis space changing relationship of the system is discussed in detail,and deduced a series of mathematical formulae on how to rectify the position changing of the reflector of the antenna through the three-dimensional angle output by the attitude measuring unit,and the system stabilization method is introduced through feed-forward compensation.it sees the angle...

A system control scheme based on attitude measuring unit is presented,which applied in ship-borne satellite antenna system.Three-axis space changing relationship of the system is discussed in detail,and deduced a series of mathematical formulae on how to rectify the position changing of the reflector of the antenna through the three-dimensional angle output by the attitude measuring unit,and the system stabilization method is introduced through feed-forward compensation.it sees the angle error of the azimuth,elevation and roll is less than: 1.3,0.5,0.5 through rolling test.The test in Fuzhou custom demonstrates that the system satisfy the technical requirements of the stable satellite communication system.

提出了在船载卫星天线系统中,一种以姿态测量单元为核心的控制系统方案,详细叙述了该系统的三轴空间转动关系,推导出了如何由姿态测量单元输出的三维方向角进行天线反射面姿态修正的一系列数学表达式,介绍了进行前馈补偿的系统稳定方法;对系统进行摇摆试验测得方位角误差小于1.3°,俯仰角和横摇角误差小于0.5°;福州海关应用证明该系统能满足卫星通信稳定系统的技术要求。

The use of the adaptive robust controller for improving control performance and stability of mobile satellite antenna systems is investigated in this paper.An adaptive robust control system of mobile satellite antennas is presented. The adaptive robust controller is designed according to the mobile satellite antenna systems model.The proposed adaptive controller and the corresponding robust adaptive law not only keep the closed-loop system robustly stable,but also provide the expected...

The use of the adaptive robust controller for improving control performance and stability of mobile satellite antenna systems is investigated in this paper.An adaptive robust control system of mobile satellite antennas is presented. The adaptive robust controller is designed according to the mobile satellite antenna systems model.The proposed adaptive controller and the corresponding robust adaptive law not only keep the closed-loop system robustly stable,but also provide the expected performance.Finally,the effectiveness of the algorithm is verified by experimental results,demonstrating that the control performance and stability of mobile satellite antenna systems are improved,and the control system maintains satisfactory control performance despite the change of road surface condition.

为了改善移动卫星天线的控制性能和稳定性,本文进行移动卫星天线的自适应鲁棒控制系统的研究.首先针对移动卫星天线数学模型,设计自适应鲁棒控制器和控制系统,所提出的自适应鲁棒控制律和控制系统不仅保证了闭环系统的稳定性,而且实现了所期望的性能,最后通过试验结果证明该控制算法的有效性,尽管外界环境道路条件的变化不同,移动卫星天线控制系统表现了满意的控制性能.

 
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