摘要
在车载卫星通讯系统中,常利用高精度速率陀螺仪作为稳定反馈器件构成天线稳定伺服控制系统,以抑制车体运动对卫星通讯天线的扰动。但由于陀螺仪自身存在的漂移特性,使得仅依靠速度闭环无法满足车载卫星"动中通"的要求。因此,采用圆锥扫描方法获取天线在空间扫过位置的卫星信号强度,再与伺服系统构成信号强度闭环,从而实现天线空间指向的稳定。介绍一种卫星信号强度闭环控制方法。该方法不仅能够很好地补偿由于陀螺飘移引起的系统稳定误差,而且对由其他原因引起的稳定误差和远距离移动引起的跟踪误差具有同样的补偿作用,达到有效锁定和高精度跟踪通信卫星的目的。
In the car-borne antenna communication system, usually make the servo system become a velocity closed-loop system by means of high precise gyroscope, in order to isolate the disturbance from the moving car. However, the working gyro＇s excursion caused only using the velocity closed-loop could not satisfy the requirement of the Satellite Communication in Motion （SCM）. So, adopt conical scanning to acquire the satellite＇s signal intensities from the scan track. Use these intensities make the system become signal intensity closed-loop to stable the communication direction of the antenna. Introduce a signal intensity closed-loop control method. This method has ability to compensate the error caused by the working gyro＇s excursion, and also could compensate some other errors, such as caused by the different working position. By this method, the system achieved the aim, which locked the satellite efficiently ant tracked it in high precision.
出处
《火力与指挥控制》
CSCD
北大核心
2009年第7期145-147,151,共4页
Fire Control & Command Control
关键词
车载天线
漂移
圆锥扫描
car-borne antenna, excursion, conical scanning
