An attitude determination and control system of the ALSAT-1 first Algerian microsatellite

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI:10.1109/RAST.2003.1303902

A. Mohammed

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引用次数: 17

Abstract

ALSAT-1 is a low-cost Algerian microsatellite build by Surrey Satellite Technology Ltd. (SSTL), it is designed to be part of a five microsatellites constellation for daily disaster monitoring. The microsatellite uses a Y momentum and Z reaction wheels, 3-axis magnetorquer rods and a single butane gas thruster for orbital maintenance. The magnetorquer rods do momentum maintenance and nutation damping f or Y/Z wheels and, libration damping and yaw phase control. The attitude sensor used, is a 3-axis fluxgate magnetometer and a sun sensor. Precise orbital knowledge will be obtained using an antenna GPS receiver supported by an on-board orbit estimator. This paper describes the various attitude control modes required to support: (1) initial attitude acquisition phase, (2) imager nadir pointing attitude controller. The specific attitude controllers and estimators used during theses modes are explained. Simulation and in-orbit commissioning results are presented to evaluate the performance and design objectives.

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阿尔及利亚第一颗微型卫星ALSAT-1的姿态确定和控制系统

ALSAT-1是由萨里卫星技术有限公司(SSTL)建造的一颗低成本阿尔及利亚微型卫星，它被设计成5颗微型卫星星座的一部分，用于日常灾害监测。微卫星使用Y动量和Z反作用力轮，3轴磁力矩棒和单个丁烷气体推进器进行轨道维护。磁致力矩棒对Y/Z轮进行动量维持和章动阻尼，并对振动进行阻尼和偏航相位控制。所使用的姿态传感器，是一个3轴磁通门磁强计和一个太阳传感器。精确的轨道信息将由星载轨道估计器支持的天线GPS接收器获得。本文描述了需要支持的各种姿态控制模式:(1)初始姿态获取阶段，(2)成像仪最低点指向姿态控制器。说明了在这些模式中使用的具体姿态控制器和估计器。给出了仿真和在轨调试结果，以评估其性能和设计目标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of

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