Analysis and design of segment control system in segmented primary mirror

Wenhao Yu; Bin Li; Mo Chen; Hao Xian

doi:10.1117/12.2285830

25 October 2017 Analysis and design of segment control system in segmented primary mirror

Wenhao Yu, Bin Li, Mo Chen, Hao Xian

Proceedings Volume 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation; 104631T (2017) https://doi.org/10.1117/12.2285830
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

Abstract

Segmented primary mirror will be adopted widely in giant telescopes in future, such as TMT, E-ELT and GMT. High-performance control technology of the segmented primary mirror is one of the difficult technologies for telescopes using segmented primary mirror. The control of each segment is the basis of control system in segmented mirror. Correcting the tilt and tip of single segment is the main work of this paper which is divided into two parts. Firstly, harmonic response done in finite element model of single segment matches the Bode diagram of a two-order system whose natural frequency is 45 hertz and damping ratio is 0.005. Secondly, a control system model is established, and speed feedback is introduced in control loop to suppress resonance point gain and increase the open-loop bandwidth, up to 30Hz or even higher. Corresponding controller is designed based on the control system model described above.

Citation Download Citation

Wenhao Yu, Bin Li, Mo Chen, and Hao Xian "Analysis and design of segment control system in segmented primary mirror", Proc. SPIE 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation, 104631T (25 October 2017); https://doi.org/10.1117/12.2285830

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