Title :
Study of Control Method for Large Telescope with Friction Drive
Author_Institution :
Nat. Astron. Obs., Chinese Acad. of Sci., Nanjing, China
Abstract :
Currently, friction drive with ultra-low speed and high accuracy is widely used in large astronomical telescopes. However, astronomical telescope is a large inertia load. Slippage and creepage are hardly avoided while the telescope are operating at ultra-low speed and facing variable external disturbances like wind buffeting. This paper describes the control method and software design for the large telescope with friction drive. UMAC-cored high-accuracy servo control system and nonlinear control algorithm are applied. The development platform, system architecture and the relations among all modules, as well as the functionalities are analyzed. The experimental results of LAMOST (The Large Sky Area Multi-object Fiber Spectroscopic Telescope) are demonstrated to show that the performance of the control method and software satisfies the requirements of large telescope.
Keywords :
astronomical telescopes; astronomy computing; friction; nonlinear control systems; servomechanisms; systems analysis; LAMOST; Large Sky Area Multi-object Fiber Spectroscopic Telescope; UMAC-cored high-accuracy servo control system; control method; development platform; friction drive; large astronomical telescopes; large inertia load; large telescope; nonlinear control algorithm; software design; system architecture; variable external disturbances; wind buffeting; Azimuth; Charge coupled devices; Control systems; Fiber nonlinear optics; Friction; Instruments; Nonlinear optics; Servosystems; Space technology; Telescopes;
Conference_Titel :
Computational Intelligence and Software Engineering, 2009. CiSE 2009. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4507-3
Electronic_ISBN :
978-1-4244-4507-3
DOI :
10.1109/CISE.2009.5362637
