多节点激光通信天线“一体式”SiC/Al轻量化摆镜
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摘要
为了降低多节点激光通信天线的工作包络尺寸、提高二维摆镜的运动控制精度,避免镜体材料与支撑材料性能差异引起的面形改变,提出了一种包含支撑结构的"一体式"轻量化摆镜。采用高体分SiC/Al作为材料,进行了摆镜以及支撑结构的一体化设计,提高了摆镜面形的力、热稳定性,可直接连接转台俯仰轴座,使摆镜回转中心距镜面的距离缩短至20 mm。有限元分析表明,"一体式"摆镜基频为1 337 Hz,在(20±5)℃工作温度范围内,面形误差峰谷值(PV)优于0.121λ,面形误差均方根值(RMS)优于0.031λ。使用ZYGO干涉仪对摆镜的面形进行检测,结果表明在(20±5)℃温度范围内摆镜面形PV值优于0.163λ,RMS值优于0.029λ,满足激光通信天线对于摆镜面形λ/25(RMS)的指标要求。
In order to reduce the range of movement of multi-node laser communication antennas,improve the motion control accuracy of two-dimensional tip-tilt mirror, avoid changing of mirror surface shape caused by the difference material performance between the mirror and the support, a integrated lightweight tip-tilt mirror with a supporting structure was proposed. Integrated design of tip-tilt mirror and support structure was conducted using material of high volume fraction SiC/Al. The thermal and mechanics stability of the mirror surface shape was improved. It can be mounted directly on the elevation axle seat, and the distance between the tip-tilt mirror rotation axis and the surface was shortened to 20 mm.The result of finite element analysis shows that the eigenfrequency of the tip-tilt mirror was of 1 337 Hz.The peak valley value(PV) of tip-tilt mirror surface shape error was better than 0.121λ, and root mean square value(RMS) was better than 0.031λ in the range of(20±5) ℃. Using ZYGO interference to test the mirror surface shape error, test results show that the peak-valley value of tip-tilt mirror surface shape error is better than 0.163λ and root mean square value is better than 0.029λ in the ambience of(20±5) ℃.Parameter requirement of laser communication antenna for tip-tilt mirror surface shape error λ/25(RMS) is satisfied.
In order to reduce the range of movement of multi-node laser communication antennas,improve the motion control accuracy of two-dimensional tip-tilt mirror, avoid changing of mirror surface shape caused by the difference material performance between the mirror and the support, a integrated lightweight tip-tilt mirror with a supporting structure was proposed. Integrated design of tip-tilt mirror and support structure was conducted using material of high volume fraction SiC/Al. The thermal and mechanics stability of the mirror surface shape was improved. It can be mounted directly on the elevation axle seat, and the distance between the tip-tilt mirror rotation axis and the surface was shortened to 20 mm.The result of finite element analysis shows that the eigenfrequency of the tip-tilt mirror was of 1 337 Hz.The peak valley value(PV) of tip-tilt mirror surface shape error was better than 0.121λ, and root mean square value(RMS) was better than 0.031λ in the range of(20±5) ℃. Using ZYGO interference to test the mirror surface shape error, test results show that the peak-valley value of tip-tilt mirror surface shape error is better than 0.163λ and root mean square value is better than 0.029λ in the ambience of(20±5) ℃.Parameter requirement of laser communication antenna for tip-tilt mirror surface shape error λ/25(RMS) is satisfied.
引文
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[2]Jiang Huilin,Jiang Lun,Song Yansong,et al.Research of optical and APT technology in one-point to multi-point simultaneous space laser communication system[J].Chinese Journal of Lasers,2015,42(4):150-158.(in Chinese)姜会林,江伦,宋延嵩,等.一点对多点同时空间激光通信光学跟瞄技术研究[J].中国激光,2015,42(4):150-158.
[3]Wang Zhongsu,Zhai Yan,Mei Gui,et al.Design of flexible support structure of reflector in space remote sensor[J].Optics and Precision Engineering,2010,18(8):1833-1841.(in Chinese)王忠素,翟岩,梅贵,等.空间光学遥感器反射镜柔性支撑的设计[J].光学精密工程,2010,18(8):1833-1841.
[4]Bao Qihong,Sha Wei,Chen Changzheng,et al.Characteristics of rear support in centre for space SiC mirror[J].Acta Photonica Sinica,2017,46(2):0222003.(in Chinese)包奇红,沙巍,陈长征,等.空间SiC反射镜背部中心支撑特性[J].光子学报,2017,46(2):0222003.
[5]Li Haixing,Ding Yalin,Zhang Hongwen.Support system study of rectangular mirror[J].Acta Optica Sinica,2015,35(5):0523002.(in Chinese)李海星,丁亚林,张洪文.矩形反射镜结构支撑技术研究[J].光学学报,2015,35(5):0523002.
[6]Xu Xinxing,Gao Yunguo,Yang Hongbo,et al.Largediameter fast steering mirror on rigid support technology for dynamic platform[J].Optics and Precision Engineering,2014,22(1):117-124.(in Chinese)徐新行,高云国,杨洪波,等.车载大口径刚性支撑式快速反射镜[J].光学精密工程,2014,22(1):117-124.
[7]Zhou Ziyun,Gao Yunguo,Shao Shuai,et al.Design of fast steering mirror using flexible hinge[J].Optics and Precision Engineering,2014,22(6):1547-1554.(in Chinese)周子云,高云国,邵帅,等.采用柔性铰链的快速反射镜设计[J].光学精密工程,2014,22(6):1547-1554.
[8]Qi Guang,Wang Shuxin,Li Jinglin.Design of high volume fraction SiC/Al composite mirror in space remote sensor[J].Chinese Optics,2015,8(1):99-106.(in Chinese)齐光,王书新,李景林.空间遥感器高体份SiC/Al复合材料反射镜组件设计[J].中国光学,2015,8(1):99-106.
[9]Dong Deyi,Li Zhilai,Li Ruigang,et al.Simulation and experiment of influence of adhesive curing on reflective mirror surface[J].Optics and Precision Engineering,2014,22(10):2698-2707.(in Chinese)董得义,李志来,李锐钢,等.胶层固化对反射镜面形影响的仿真与试验[J].光学精密工程,2014,22(10):2698-2707.
[10]Jia Shuqiang,Huang Wei,Pang Wubin.Influence of adhesive thickness on surface deformation of mirror supported by three-point mount[J].Optics and Precision Engineering,2015,23(7):2005-2012.(in Chinese)贾树强,黄玮,庞武斌.胶层厚度对三点支撑反射镜面形的影响[J].光学精密工程,2015,23(7):2005-2012.
[11]Yoder Jr P R.Opto-mechanical Systems Design[M].Hoboken:CRC Press,2005:396-398.