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Modeling and Measuring Friction of the Leighton 10 m Telescope

Guo, Yongwei and Woody, David and Matinez, Nicolas (2022) Modeling and Measuring Friction of the Leighton 10 m Telescope. Research in Astronomy and Astrophysics, 22 (12). Art. No. 125017. ISSN 1674-4527. doi:10.1088/1674-4527/ac9de1.

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Estimating and identifying friction are important aspects of simulating a mechanical drive system. Accurate friction modeling helps to improve a telescope's performance. However, the friction conditions inside are complex and hard to measure. We did simulations with mathematical transfer functions for the Leighton 10 m Telescope and employed a polyline model to identify sources of friction. We made a two-stage model for the Leighton 10 m Telescope. Based on measurements of the motor's currents and speeds, we constructed a curve containing the friction information of the transmission elements. We simulated the system using a step function input under many combinations of friction parameters. By comparing simulation results with the measured ones, we determined the various friction components. This model accurately reproduced the telescope performance including the nonlinearities.

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Guo, Yongwei0000-0002-4239-5317
Additional Information:This work is sponsored (in part) by the Chinese Academy of Sciences (CAS) through a grant to the CAS South America Center for Astronomy (CASSACA) in Santiago, Chile. We thank Isu Ravi for providing the current detections and Michael Stramenga for the comments on the model. We thank Drs. Zhong Wang, James Lamb, Cong Xu, Yanfeng Dai, Morgan Catha and Piaoran Liang for helpful comments and discussions. We also thank Dr. Hairen Wang for calculating some mechanical parameters of the Leighton 10 m Telescope.
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Chinese Academy of Sciences South America Center for Astronomy (CASSACA)UNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20230103-818063100.38
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:118634
Deposited By: Research Services Depository
Deposited On:07 Feb 2023 20:14
Last Modified:07 Feb 2023 20:14

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