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1.中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033
2.中国科学院大学,北京 100049
[ "陈 卓(1996-),男,湖北麻城人,硕士研究生,2018年于中南大学获得学士学位,主要从事航天光学遥感器结构的设计。E-mail: chenzhuo183@mails.ucas.edu.cn" ]
[ "李朝辉(1969-),男,吉林双辽人,博士,研究员,1991年、1994年于长春光学精密机械学院分别获得学士、硕士学位,2001年于中科院长春光学精密机械与物理研究所获得博士学位,主要从事航天光学遥感器的研制工作。E-mail: lizh_ciom@yahoo.com.cn" ]
收稿日期:2020-09-01,
修回日期:2020-09-21,
纸质出版日期:2021-03-15
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陈卓,胡庆龙,李朝辉.基于碳纤维框架天基目标探测二维跟踪转台结构优化[J].光学精密工程,2021,29(03):547-557.
CHEN Zhuo,HU Qing-long,LI Zhao-hui.Structural optimization of 2-D tracking turntable with carbon fiber framework for spatial target detection[J].Optics and Precision Engineering,2021,29(03):547-557.
陈卓,胡庆龙,李朝辉.基于碳纤维框架天基目标探测二维跟踪转台结构优化[J].光学精密工程,2021,29(03):547-557. DOI: 10.37188/OPE.20212903.0547.
CHEN Zhuo,HU Qing-long,LI Zhao-hui.Structural optimization of 2-D tracking turntable with carbon fiber framework for spatial target detection[J].Optics and Precision Engineering,2021,29(03):547-557. DOI: 10.37188/OPE.20212903.0547.
为满足某星载太阳辐照度光谱仪对太阳的跟踪指向技术要求,设计了一种二维转台系统。本文对该转台进行了结构的拓扑优化设计、有限元仿真及试验验证。首先,通过研究和比较现有的转台方案,确定以基本地平式作为转台的结构形式,选择性能优良的M55J碳纤维复合材料作为转台结构的主要材料,配合TC4镶嵌件来连接部件。根据拓扑优化结果和工程经验,分别完成了转台3个主要部件的蒙皮和加强筋结构设计,得到了总体尺寸为966 mm×400 mm×730 mm、质量为27.3 kg的转台框架。针对此结构进行有限元分析,得到转台整体基频为58 Hz,结构强度和刚度满足设计指标要求。最后,对转台初样进行了抗力学试验和热真空试验。试验结果表明,转台整体的一阶频率为53 Hz,正弦振动前后基频变化在2%以内,随机振动前后基频变化在4%以内,在真空环境中功能正常。该转台整体结构设计合理,性能稳定,能够满足设计指标要求。
To optimize solar spectroradiometers on satellites, a spatial turntable is designed according to performance indexes; finite element analysis is conducted and the properties of the prototype are tested. First, various articles were consulted to determine the fundamental structure of the turntable, and the azimuthal structure was selected. By researching the properties of different materials, M55J carbon fiber—which uses TC4 inserts for connection—was chosen as the main material for the turntable. The three main parts of the turntable are designed based on topological results and engineering experience; thus, a turntable frame with a size of 966 mm× 400 mm× 730 mm and mass of 27.3 kg is designed. Next, simulation analysis is carried out, from which the natural frequency of the entire turntable is established as 58 Hz. This implies that the strength and stiffness of the turntable fulfill the optimization criteria. Finally, resistance and thermal vacuum tests are conducted on the prototype. Test results showed that the natural frequency of the turntable was 53 Hz and the variation of the turntable’s natural frequency was within 2% (sinusoidal vibration) and 4% (random vibration). Furthermore, we observed that the turntable functioned normally in a vacuum. Accordingly, the proposed design is tenable.
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