移动卫星通信捷联式天线稳定系统

介绍了一种应用激光陀螺惯性导航系统组成的移动卫星通信的捷联式天线稳定系统 ,给出了天线稳定和跟踪的控制方法和最优值搜索法。采用该系统可测量载体的姿态角和经度纬度 ,借助于惯性系统的输出信号控制天线轴使天线跟踪指定的卫星 ,卫星天线接收的信号可检测出跟踪误差 ,通过伺服系统控制天线转动 ,以使通讯信号为最强。采用了 GPS修正惯性系统的误差 ,成为 GPS/ INS的组合系统。在山区道路上跑车试验结果表明 ,当车的横滚角和俯仰角达到 6°,频率为 1Hz,方位角变化 180°时 ,在此动态条件下根据测量的卫星信号场强可知 ,跟踪误差小于 0 .2°。接收到的电视信号稳定清晰 ,图像和电话信号都是满意的。跑车试验表明 ,天线跟踪卫星的静态和动态精度完全满足了移动卫星通信的技术要求

A strap-down stabilized antenna system for mobile satellite communications

A strapdown stabilized antenna system (SSAS) for mobile satellite communications using ring laser gyro inertial navigation system (LINS) was introduced in this paper.The stabilizing and tracking algorithm of the antenna and the optimum seeking method were proposed.The LINS is used for measuring the attitude angles,the longitude and the latitude.The attitude angles of the antenna are controlled by the output signals of the LINS for tracking the satellite.The satellite antenna receiver provides the communication satellite signal for detecting the tracking errors and for controlling the attitude angles of the antenna,so that the received communication signal becomes maximum.The GPS receiver is used to correct the LINS errors,so that the SSAS is a GPS/INS integrated system.As shown by the field test results,the vehicle runs in the mountain area,both the maximum amplitude of the roll and pitch are around 6 deg.their frequencies are around 1 Hz,the azimuth changes up to 180 deg.Under such dynamic conditions the tracking errors of the antenna with respect to the satellite is less then 0 2 deg,which has been measured by the intensity of the received satellite signal.On the moving vehicle the television signals hold stable and clear,the carried pictures and telecommunication phone voices from the tracking satellite are approved very well.The results of the field test have proved that the static and dynamic accuracy of the antenna totally fulfill the technical requirement for mobile communication.