Junhui Peng, H. Cao, Decheng Wu, Zhiwei Sun, Jin Fan
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A Novel Method of Surface Damage Localization for FAST Active-reflector
In this paper, a novel approach of surface damage localization for the Five hundred meters Aperture Spherical radio Telescope (FAST) based on the focal-field distribution (FFD) is proposed. Firstly, according to the structure of the FAST, we model the FAST with surface damage caused by down-tied cables fatigue fractures. Then the FFD with different damage locations obtained by simulation are collected to form a full FFD feature database. Finally, the received signals of the FAST array feeds with surface damage is matched with the database to obtain the damage location. Simulation results show that the matching algorithm can effectively estimate the damage location.
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