一种星敏感器系统热设计方法及试验验证

doi:10.3901/JME.2021.22.325

机械工程学报 ›› 2021, Vol. 57 ›› Issue (22): 325-334.doi: 10.3901/JME.2021.22.325

• 可再生能源与工程热物理 • 上一篇下一篇

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一种星敏感器系统热设计方法及试验验证

姬松松¹, 孙婷¹, 邢飞²

1. 北京信息科技大学先进光电子技术国际合作联合实验室北京 100192;
2. 清华大学精密仪器系北京 100084

收稿日期:2020-11-26 修回日期:2021-09-30 出版日期:2021-11-20 发布日期:2022-02-28
通讯作者: 孙婷(通信作者),女,1986年出生,博士,副教授。主要研究方向为空间光学姿态敏感器和天文导航技术。E-mail:sunting09@tsinghua.org.cn
作者简介:姬松松,男,1994年出生。主要研究方向为光电图像处理和星敏感器热控技术方向。E-mail:bestwaynen@gmail.com
基金资助:
国家自然科学基金青年基金（61605099）和北京市高层次创新创业人才支持计划青年拔尖人才（G04070017）资助项目。

Thermal Design Method and Experimental Verification of Star Sensor System

JI Songsong¹, SUN Ting¹, XING Fei²

1. Joint International Research Laboratory of Advanced Photonics and Electronics, Beijing Information Science & Technology University, Beijing 100192;
2. Department of Precision Instrument, Tsinghua University, Beijing 100084

Received:2020-11-26 Revised:2021-09-30 Online:2021-11-20 Published:2022-02-28

摘要/Abstract

摘要： 目前，国内机构针对星敏感器的温控研究与设计较少，多集中于星图的图像处理和图像算法的优化。着重以星图中目标能量变化、信噪比、质心定位误差等参数为指标，分析温度对该星敏感器的热影响，从而实现高精度星敏感器在空间复杂热环境下的可靠应用。进一步基于星敏感器的结构及热分布，对星敏感器进行热设计及散热路径优化，提出星敏感器热电制冷器（Thermo electric cooler，TEC）的热控措施。以典型在轨高温工况与低温工况为例，利用有限元仿真软件进行该热设计的有效性与合理性仿真分析。在以上的设计与分析基础上，完成一套温度控制系统，通过模拟星敏感器在高温工况下的环境条件，使用热电制冷方式对星敏感器采取制冷措施，使星敏感器探测器温度维持在20℃±3℃，达到温控指标，保证星敏感器能够在恶劣温度环境下持续提供高精度姿态信息。重点阐明热环境因素与成像质量之间的关系，完成温度与星点识别精度的关联性分析，为后续星敏感器热控设计及定姿精度提升提供参考。

关键词: 星敏感器, 目标能量变化, 信噪比, 热设计, 仿真分析

Abstract: Good dynamic performance is the key to capture the wind energy efficiently in the vertical axis wind turbine blades. Reasonable flow control method can effectively improve the aerodynamic performance of the blades and improve the utilization rate of wind energy. Based on the two-dimensional H-shaped vertical axis model, the effects of different ellipse airfoil slots and their opening width on the dynamic stall of vertical axis wind turbine are studied. The results show that the main mechanism of the slots is to delay the dynamic stall by controlling the flow separation. Compared with the baseline airfoil, the torque coefficient of the elliptic slot board airfoil increases by 53.8% when the tip speed ratio is 0.5, which significantly enhances the starting torque of the vertical axis wind turbine, however, when the tip speed ratio is greater than 1.5, the positive effect of the slots to control flow separation is not obvious. Compared with the traditional convergence straight airfoil slots, the elliptic airfoil slots have no significant influence on the outflow field due to the tangency between the fluid at the outlet and the surface of the airfoil, so the power coefficient of the elliptic airfoil slots is relatively higher when the tip ratio is larger. In addition, due to the reduction of the adverse pressure gradient on the suction surface, the phase angle of the stall of the blade is delayed by the elliptical airfoil slot, which effectively inhibits the flow separation and improves the operation stability of the wind turbine.

Key words: star sensor, target energy change, signal to noise ratio, thermal design, simulation analysis

中图分类号:

TG156

姬松松, 孙婷, 邢飞. 一种星敏感器系统热设计方法及试验验证[J]. 机械工程学报, 2021, 57(22): 325-334.

JI Songsong, SUN Ting, XING Fei. Thermal Design Method and Experimental Verification of Star Sensor System[J]. Journal of Mechanical Engineering, 2021, 57(22): 325-334.

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一种星敏感器系统热设计方法及试验验证

Thermal Design Method and Experimental Verification of Star Sensor System

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