To expand field of view (FOV) of telescope, the method of special scanning often is used, but, for some telescopes with special\nstructure in optics and machine, the conventional scanning methods are unsuitable. This paper proposes a novel scanning method\nbased on autoguiding system so as to expand the FOV of fiber array solar optical telescope (FASOT) in possession of the special\nstructure in optics and machine. Meanwhile, corresponding experiments are conducted in the FASOT prototype, FASOT-1B, in\norder to demonstrate that, for both FASOT and FASOT-1B, the proposed scanning method is feasible. First of all, on the basis of the\nsoftware and hardware characteristics of FASOTand FASOT-1B, the three key technologies related to the proposed scanningmethod\nare described: quickly locating and pointing the first scanning step, the closed-loop controlling of multistep scanning, and the\ndisturbance suppression of every scanning step based on Kalman filter. Afterwards, experiments are conducted and corresponding\nresults show that the proposed scanning method is robust for the random disturbances forced on every scanning step and able to\nmeet the scanning requirement of both FASOT and FASOT-1B .
Loading....