Journal of Applied Optics, Volume. 46, Issue 1, 41(2025)

Design and experimental study of filter wheel mechanism of space coronagraph

Wei GUO1,2, Mingming XU1,2、*, Jiangpei DOU1,2, Jinning HE1,2, Zihao ZHANG1,2,3, and Lingyi KONG1,2
Author Affiliations
  • 1Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing 210042, China
  • 2Key Laboratory of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing 210042, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(16)
    Structure design scheme of filter wheel mechanism
    L-base height optimization parameters of filter wheel
    Structure design optimization iterative process of filter wheel
    Finite element model
    Modal analysis of filter wheel mechanism
    Vibration environment test
    Schematic diagram of optical system for accuracy test of near infrared filter runner
    Accuracy test of near-infrared filter wheel mechanism
    • Table 1. Design variables and optimization results

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      Table 1. Design variables and optimization results

      参数设计范围/mm优化结果/mm优化后固有频率/Hz
      p10≤p1≤13.410.613540.67
    • Table 2. The first 4-order modal analysis results of filter wheel mechanism

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      Table 2. The first 4-order modal analysis results of filter wheel mechanism

      阶次频率/Hz振型方向
      1540X方向
      2625Y方向
      3628Y方向
      4822Z方向
    • Table 3. Sinusoidal vibration conditions of filter wheel

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      Table 3. Sinusoidal vibration conditions of filter wheel

      XYZ
      频率/Hz试验条件频率/Hz试验条件频率/Hz试验条件
      注:表2中试验条件mm为幅值;g为重力加速度。
      5~108.3 mm5~1010 mm5~1010.8 mm
      10~253.3 g10~144 g10~144.3 g
      25~854.8 g14~656 g14~606.7 g
      85~1003.7 g65~728 g60~727 g
      72~1005.3 g72~1005.7 g
    • Table 4. Random vibration conditions of filter wheel

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      Table 4. Random vibration conditions of filter wheel

      方向频率范围/Hz验收级(功率谱密度)均方根加速度
      X20~1006 dB/Oct7.98 grms
      100~8000.0595 g2/Hz
      800~2000−9 dB/Oct
      Y20~1006 dB/Oct4.74 grms
      100~8000.021 g2/Hz
      800~2000−9 dB/Oct
      Z20~1006 dB/Oct6.03 grms
      100~8000.034 g2/Hz
      800~2000−9 dB/Oct
    • Table 5. Results of the first-order frequency test of characteristic sweep frequency by filter wheel mechanism

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      Table 5. Results of the first-order frequency test of characteristic sweep frequency by filter wheel mechanism

      试验内容试验方向
      XYZ
      振动试验前扫频试验频率/Hz665718.8742.8
      振动试验后扫频试验频率/Hz665.6711.3714.9
      频率漂移率/%0.0913.8
      仿真结果/Hz540625822
      试验和仿真结果误差率/%18.81310.7
    • Table 6. Random vibration test data

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      Table 6. Random vibration test data

      X方向随机振动(con:7.98 grms)Y方向随机振动(con:4.74 grms)Z方向随机振动(con:6.03 grms)
      测点位置试验方向测点响应/ grms放大 系数测点位置试验方向测点响应/ grms放大系数测点位置试验方向测点响应/ grms放大系数
      1#电机 安装接口X8.571.071#电机 安装接口X1.170.251#电机 安装接口X2.330.39
      Y4.310.54Y5.941.25Y2.210.37
      Z344.26Z8.291.75Z34.975.8
      2#减速箱 上端X9.041.132#减速箱 上端X1.930.412#减速箱 上端X0.640.11
      Y17.32.17Y27.25.74Y2.780.46
      Z6.540.82Z6.491.16Z17.392.88
      3#滤光片 转盘盲孔处X47.25.913#滤光片 转盘盲孔处X22.284.73#滤光片 转盘盲孔处X4.610.76
      Y394.89Y24.575.18Y25.294.19
      Z5.570.7Z5.951.26Z41.646.9
    • Table 7. Eccentricity error test results of near-infrared filter runner

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      Table 7. Eccentricity error test results of near-infrared filter runner

      滤光片孔位技术指标/mm试验前精度/mm试验后精度/mm
      孔位2相对孔位1≯±0.50.096 80.0968
      孔位3相对孔位1≯±0.50.1160.135
      孔位4相对孔位1≯±0.50.1350.155
      孔位5相对孔位1≯±0.50.1160.174
      孔位6相对孔位1≯±0.50.1160.116
      孔位7相对孔位1≯±0.50.096 80.135
    • Table 8. Test results of repeated positioning accuracy error of near-infrared filter runner

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      Table 8. Test results of repeated positioning accuracy error of near-infrared filter runner

      滤光片孔位试验前精度/mm试验后精度/mm
      孔位1相对孔位10.0190.019
      孔位2相对孔位20.0380.038
      孔位3相对孔位30.0580.058
      孔位4相对孔位40.0190.019
      孔位5相对孔位50.0580.039
      孔位6相对孔位60.0770.039
      孔位7相对孔位70.0190.019
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    Wei GUO, Mingming XU, Jiangpei DOU, Jinning HE, Zihao ZHANG, Lingyi KONG. Design and experimental study of filter wheel mechanism of space coronagraph[J]. Journal of Applied Optics, 2025, 46(1): 41

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    Paper Information

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    Received: Mar. 4, 2024

    Accepted: Dec. 19, 2024

    Published Online: Apr. 1, 2025

    The Author Email: Mingming XU (许明明)

    DOI:10.5768/JAO202546.0101002

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