车载动中通天线多环路伺服的正割补偿

在车载动中通卫星通信系统中,为了隔离天线载体姿态变化对天线指向的扰动,天线伺服环路常采用陀螺稳定外套自跟踪环路和引导位置环路的多环路设计。对于采用A-E轴系座架卫星通信动中通天线,天线座A轴的运动与天线指向在H面的运动之间存在一个正割关系,因此在环路设计时需要进行正割补偿。通过传递函数结构图分析,详细论述了在不同位置引入正割补偿对伺服环路的影响,确定了正割补偿设置方案。

Secant Compensation for Multi-loop Servo Control of Vehicular SATCOM On-the-move System

Position and direction changes are the mai n disturbance to the pointing of antenna in vehicular SATCOM on-the-move syste m.To isolate this disturbance and obtain better pointing accuracy,cascade contro l loops are designed for the control system,including gyro loop,auto-tracking l oop and position guiding loop.For an azimuth-elevation type antenna mount,there is a secant relationship between the azimuth rotation and antenna pointing,so s ecant compensation is needed in the control loop design.The control performances of secant compensation in different positionsare discussed by a transfer functi on structure analysis.A secant compensation scheme is concluded.