Subjects: Geosciences >> Space Physics submitted time 2016-05-13
Abstract： To meet the needs of image stabilization system of domestic solar observatory imaging instrument, a position sensitive detector(PSD)-based electronics system design for high-precision sun sensor is proposed.Concrete measures are put forward to improve the sensitivity and reduce system noise.At presemt,level of the system noise is lower than 4 nA,and has high resolving power of 0.3 in center area of working scope,can cooperate with tip-tilt mirror to make up this system image stabilization system, which serve for Kua Fu and SPORT project and other solar imaging instruments which has high resolution imaging demand.
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-04-22
Abstract： Regarding the shutter of space imager as the research background,the advantages and disadvantages of different types of shutters are introduced. The rotary-disc shutter is selected as the research object. Starting from the mode of exposure, the control strategy of shutter is investigated. The reason for selecting PMSM motor is analyzed, and a controller based on Digital Signal Processor (DSP) is designed. Furthermore, the maximum error of exposure time is less than 3.0%, which meets the performance requirements of telescope imager.
Peer Review Status:Awaiting Review
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