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- W2053516206 abstract "Upon its completion, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) will be the largest single dish radio telescope ever in the world. The construction has been initiated in March 2011 in Guizhou province of China. The whole construction process is expected to be completed in September 2016, with duration of 5.5 years. With an aperture of 500 meters and an illumination aperture of 300 meters, the active reflector is one of the most important parts of FAST. The reflector is composed of a ring beam, a cable net and thousands of panels, tie-down cables, actuators and anchors. For the observation process of source switching and source tracking, the parabola shape of the reflector is achieved by drawing back of the tie-down cables by the actuators. The motion performance and the reliability of the actuators are of great importance to the telescope. In this paper, the motion models of the actuators are analyzed for the observation process of source switching and source tracking. Several design schemes are proposed, including mechanical and hydraulic design. The electric, mechanical and hydraulic characteristics of these designs are discussed. Related experimental studies are performed to investigate the electric and mechanical performances of these actuator prototypes. Based on the analysis and test results, a final type of actuator will be optimally concluded to meet the requirements of the reflector of FAST." @default.
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- W2053516206 date "2012-09-17" @default.
- W2053516206 modified "2023-09-23" @default.
- W2053516206 title "The development of the actuator prototypes for the active reflector of FAST" @default.
- W2053516206 doi "https://doi.org/10.1117/12.925800" @default.
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