摘要
针对敏捷卫星需要具备在复杂姿态下推扫成像的能力,建立了卫星在不同姿态下的像移速度和偏流角的数学模型,并进行了仿真分析,讨论了姿态改变对卫星成像带来的影响。仿真分析表明:姿态改变是影响像移速度和偏流角的最大因素,敏捷卫星从一个姿态变化到另一个姿态成像时,需要根据预期的姿态调整相机的积分时间以满足成像质量要求,同时偏流角也需要做相应调整以补偿姿态改变带来的偏流角变化。
The agile satellite needs to have the capability to realize push-broom imaging in complex satellite attitude condition. In this paper, a mathematic model to calculate the image motion velocity and the drift angle of agile satellite is built, and the image motion velocity and the drift an gle in different attitudes are simulated in order to analyze their influence on image acquisition. The simulation and analysis show that the various satellite attitudes affect the image motion velocity and the drift angle most. When the agile satellite changes its attitude from one to another, according to the expected attitude, its camera should adjust its integration time to attain high im aging quality, and at the same time, the yaw angle should be controlled to compensate the change of drift angle caused by the attitude change.
出处
《航天器工程》
北大核心
2015年第3期34-39,共6页
Spacecraft Engineering
关键词
像移速度
偏流角
积分时间
敏捷卫星
姿态控制
image motion velocity
drift angle
integration time
agile satellite
attitude control
