Development of the hexapod for the secondary mirror of the YNAO 2-m Ring Solar Telescope

Dehua Yang; Changcheng Wu; Qishuai Lu; You Wang; Yichun Dai; Zhenyu Jin

doi:10.1117/12.3021630

11 September 2024 Development of the hexapod for the secondary mirror of the YNAO 2-m Ring Solar Telescope

Dehua Yang, Changcheng Wu, Qishuai Lu, You Wang, Yichun Dai, Zhenyu Jin

Author Affiliations +

Proceedings Volume 13094, Ground-based and Airborne Telescopes X; 130944T (2024) https://doi.org/10.1117/12.3021630
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The 2-m Ring Solar Telescope (RST) of the Yunnan Astronomical Observatory (YAO) is a new-generation solar telescope that will provide high-resolution solar observations. The RST is now under commissioning on the YAO campus. The secondary mirror of the RST is a 0.6-m diameter convex mirror that is supported by a hexapod system which is to provide precise and stable positioning and alignment of the secondary mirror. We present the development of the hexapod system, including its technical requirement, workspace, actuator and joint design. The classic Stewart type configuration is adopted for the hexapod design and the stepmotor-ballscrew concept for the actuator design. The one-part 2D flexure concept is used to manufacture the Hooke’s joints and also used for 3D rotary joint design. We also describe the performance tests of the hexapod system in laboratory. The hexapod is able to cover a sphere of sf7mm. The translational displacement resolution is down to 0.1μm and repeatability <0.1μm RMS, the rotational displacement resolution is down to 0.5 arcsec with repeatability <0.1 arcsec RMS. Besides, the hexapod exhibits high stiffness over 60Hz with a payload of 70kg.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Dehua Yang, Changcheng Wu, Qishuai Lu, You Wang, Yichun Dai, and Zhenyu Jin "Development of the hexapod for the secondary mirror of the YNAO 2-m Ring Solar Telescope", Proc. SPIE 13094, Ground-based and Airborne Telescopes X, 130944T (11 September 2024); https://doi.org/10.1117/12.3021630

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