摘要
无论是机载还是星载合成孔径雷达在成像过程中要求天线波束稳定而精确地指向测绘带,但是在运动过程中,其飞行姿态和航向受大气扰动的影响而产生变化,表现为偏流角、横滚角和俯仰角的随机变化,不能满足雷达天线稳定要求。因此,必须对角运动造成的误差进行补偿,才能获得较高分辨率的图像。本文以DSP芯片TMS320F2812为核心设计数字化运动控制系统,使控制平台相对于飞机姿态变化作反方向的运动,从而使雷达天线指向测绘带区域,可以获得较高分辨率的图像。通过实验分析,此设计能够满足系统要求,控制性能好。
The antenna must point to the mapping zones steadily and precisely when either airborne SAR（synthetic aperture radar） or star-borne SAR imaging. However the flying stance and direction always be infected by the atmosphere movement which results in random angle variation such as the drift, roll and pitch movement, it can not satisfy the requirement of radar antenna stability. Therefore, the errors caused by angle movement must be compensated to achieve high resolution radar images. A digital controlling system with DSP chip TMS320F2812 is presented that can make reverse movement to the control platform when plane position changes so that radar antenna can point to the mapping zone. Experiment analysis shows the system has good controlling performance and can satisfy the systematic requirement.
出处
《电子测量技术》
2007年第9期87-89,共3页
Electronic Measurement Technology
