提高万向轴系式快速反射镜指向精度的装置

为了减小万向轴系式快速反射镜(FSM)的轴向间隙, 改善FSM系统的指向精度, 设计了一种轴系间隙消除装置。在明确万向轴系式FSM结构原理的基础上, 分析了FSM系统指向误差的来源。然后, 设计了轴系间隙消除装置, 计算了压缩弹簧预紧力并对它的结构参数进行了设定。最后, 针对是否装有轴系间隙消除装置的FSM系统的指向精度进行了对比测试。结果表明: 该轴系间隙消除装置能够有效改善FSM系统的指向精度, 使其在方位方向提高约4.4倍, 俯仰方向提高约3.3倍。此外, 在刚性支撑轴系基础上设计的弹性轴向间隙消除装置, 不仅改善了万向轴系式FSM的指向精度, 还为系统的运动部分提供了二次刚性支撑, 从而进一步提高了FSM的承载能力。

Abstract

To reduce the axial clearance of a Fast Steering Mirror (FSM) with a spherical gemel and to improve its pointing precision, a device for removing the axial clearance was designed. The structure principle of the FSM with spherical gemel was analyzed and the error sources influencing the pointing precision of FSM were discussed. Then, the device for removing axial clearance was designed, the compress force of a spring was confirmed and its structure parameters were set. Finally, the pointing precisions of FSMs with and without the device for removing axial clearance were tested respectively. The results show that the device for removing axial clearance is very helpful to improve the pointing precision of FSM with spherical gemel, and the azimuth pointing precision has been improved about 4.4 times, the pitching pointing precision has been improved about 3.3 times. The designed flexure device for removing axial clearance not only improves the pointing precision of the FSM but also provides a rigid supporting for the FSM system, so that the carrying capacity of the FSM is increased further.

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徐新行, 刘廷霞, 时魁, 薛向尧, 王兵. 提高万向轴系式快速反射镜指向精度的装置[J]. 光学精密工程, 2015, 23(6): 1688. XU Xin-hang, LIU Ting-xia, SHI Kui, XUE Xiang-yao, WANG Bing. Device for improving pointing precision of fast steering mirror with spherical gemel[J]. Optics and Precision Engineering, 2015, 23(6): 1688.

提高万向轴系式快速反射镜指向精度的装置

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