Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system
Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system
复制标题
高能聚焦望远镜（HEFT）姿态控制系统的地面性能
DOI：
10.1117/12.513439
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
K. Ziock
中科院分区：
文献类型：
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作者：
K. Gunderson;C. M. H. Chen;F. Christensen;W. Craig;T. Decker;C. Hailey;F. Harrison;R. McLean;R. Wurtz;K. Ziock
高能聚焦望远镜（英语：High Energy Focusing Telescope，缩写：HEFT）是一个球载的硬X射线/伽马射线（20-70 keV）天文实验。HEFT的10角分视场和1角分角分辨率对其姿态控制系统（ACS）提出了具有挑战性的要求。一个基于微处理机的ACS已经开发管理目标的获取和恒星跟踪。ACS由各种传感器和执行器组成，并提供双向地面通信，所有这些都由机载计算机控制。地面指向性能测量表明，1σ抖动为7”，陀螺漂移率<1”s-1。在飞行环境中，抖动预计会恶化，但星星跟踪器数据预计会显著降低漂移率，从而使预测的1σ绝对姿态确定≥4.7”。HEFT计划于2004年春季飞行。
The High Energy Focusing Telescope (HEFT) is a balloon-borne, hard x-ray/gamma ray (20-70 keV) astronomical experiment. HEFT's 10 arcminute field of view and 1 arcminute angular resolution place challenging demands on its attitude control system (ACS). A microprocessor-based ACS has been developed to manage target acquisition and sidereal tracking. The ACS consists of a variety of sensors and actuators, with provisions for 2-way ground communication, all controlled by an on-board computer. Ground based pointing performance measurements indicate 1σ jitter of 7" and gyro drift rates of <1" s-1. Jitter is expected to worsen in the flight environment, but star tracker data are expected to reduce drift rates significantly, enabling a predicted 1σ absolute attitude determination of ≥4.7". HEFT is scheduled for flight in Spring 2004.