A Fast Steering Mirror Driven by Voice Coil Motors and Supported by Magnetic Suspension
2019 23rd International Conference on Mechatronics Technology (ICMT)(2019)
摘要
Fast steering mirrors (FSMs) are mounted on observation satellites to capture large-scale and high-resolution images. In order to get high quality image correction, FSMs need to have large apertures, high responsivity and multiple degrees of freedom control. In this paper, we propose a FSM that has a large-diameter mirror driven by four voice coil motors and is supported by a compact magnetic suspension system enabling it to have fast response and long-range movement not only in the tip-tilt directions but also in the axial directions. A prototype FSM with an 80 mm diameter dummy mirror was built. The mirror is supported by a magnetic suspension system having six degrees of freedom. The suspended mirror is controlled by the VCMs and the driving ranges in the axial and tip-tilt directions are ±500 μm and ±20 mrad, respectively. Furthermore, the servo bandwidths achieved in the tip-tilt directions are more than 1kHz.
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关键词
fast steering mirror,voice coil motor,magnetic suspension,wide bandwidth,observation satellite
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