Optimized design for the supporting structure of a large aperture mirror

Wang, Jia Rui; Yang, Hong

doi:10.1117/12.2580254

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…Analyze and calculate the flexible hinge deflection and corner of the flexible hinge support structure [15]. The empirical equations for the flexible hinge deflection y and corner θ are shown below:…”

Section: Design Of Flexible Hingesmentioning

confidence: 99%

Design and Evaluation of Flexible Support Based on Space Mirror

Zhu,

Tian,

Liu

et al. 2024

Applied Sciences

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The mirror component is one of the most critical components in the space remote sensing payload, and the performance of its support essentially determines the imaging quality of the system. Mirror components need to have high face shape accuracy, high reliability, and high stability. In this paper, taking the square mirror with the size of 550 mm × 450 mm as an example, we chose the Ultra-Low-Expansion Glass (Corning) as the mirror blank material, and through in-depth research on the principle of the three-point backside support and the engineering realization, we designed a three-point backside flexible support structure applied to the space mirror component. The design results were testified by simulation analysis; the results showed that with the mirror’s weight of 13.2 kg, the surface density can reach 48.5 kg/m2. For each gravity acceleration of 1 g, within the temperature range from 16 to 24 °C, carrying a forced displacement of 5 μm, the RMS value of the mirror component can reach 1/55λ (λ = 632.8 nm), which meets the requirement of high face shape accuracy of the mirror component in space. Finally, the mechanical test was carried out on the assembled mirror component, and the intrinsic frequencies of three directions of the mirror component were obtained through the test: 173.8 Hz, 176.4 Hz and 271.5 Hz, respectively. The changes of the mirror and its support structure were all less than 5″ after the 8 g sinusoidal vibration test and the 5.66 g random vibration test, which indicates that the flexible support structure meets the requirements of the high reliability of the space remote sensing loads and the high accuracy of the space mirror component. It shows that the flexible support structure meets the high reliability and high stability requirements of space remote sensing loads. The theoretical data and test results in this research can provide theoretical references for mirror components of the same size and type.

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Section: Design Of Flexible Hingesmentioning

confidence: 99%

Design and Evaluation of Flexible Support Based on Space Mirror

Zhu,

Tian,

Liu

et al. 2024

Applied Sciences

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“…Common lightweight forms of sandwich structures include the triangular rib structure, square rib structure, and hexagonal rib structure [16] (see Figure 3). The structural form of the rib should consider not only the weight of the reflector but also the rigidity, manufacturing process, and processing process.…”

Section: Design Of Mirror Support Point Positionmentioning

confidence: 99%

Lightweight Design and Evaluation of Square Reflector

et al. 2023

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In order to reduce the weight of optical elements in space remote sensors while increasing their stiffness, this paper takes an off-axis system secondary mirror as an example to design a square mirror with a size of 500 mm × 500 mm. The mirror adopts ultra-low expansion glass as the raw material. The paper proposed a lightweight form of gradual reinforcement and conducted the mirror assembly simulation analysis. The analysis results show that the weight of the lightweight mirror is 13.6 kg, and the surface density can reach 54.4 kg/m2. Under the circumstances of 1 g gravity and the temperature change of 15 °C~25 °C, the surface shape accuracy of the mirror assembly can reach 1/90λ (λ = 632.8 nm). Through the final testing, the first-order intrinsic frequency of the reflex mirror components is 167.8 Hz. The gap between the test results and the theoretical simulation results is less than 3%, which proves that the mirror assembly in the lightweight form of gradual reinforcement fully meets the index requirements and can provide a theoretical reference for the assembly of a mirror of similar size and type.

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Optimized design for the supporting structure of a large aperture mirror

Cited by 2 publications

References 3 publications

Design and Evaluation of Flexible Support Based on Space Mirror

Design and Evaluation of Flexible Support Based on Space Mirror

Lightweight Design and Evaluation of Square Reflector

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