High-precision scanner control system

被引:1
|
作者
Yanagita, Y. [1 ]
Aoki, K. [1 ]
Kurii, T. [2 ]
机构
[1] NEC Corp Ltd, Nakahara Ku, 1753 Shimonumabe, Kawasaki, Kanagawa 2118666, Japan
[2] NEC TOSHIBA Space Syst, Tokyo 1838551, Japan
关键词
scanner control system; cyclic memory;
D O I
10.1117/12.864676
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
A high-precision whiskbroom scanner control system, which is used on earth observation satellites, is discussed. This control system is required to keep high angular precision with ultra-smooth rotation. We designed a feedback control system consisting of a rate loop for rotation-speed control and a position loop for angular control. Adding a feedforward control system using cyclic memory, 1st order rotational synchronizing disturbance caused by eccentric load has been compressed over 50 dB. As a result, high pointing accuracy with a standard deviation of 0.003 degree or less has been achieved in rotating with a constant speed of 79.4 rpm.
引用
收藏
页数:9
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