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非接触式指向反射镜检测系统的误差分析 被引量:1

Error Analysis for the Non-Contact Measuring System of Pointing Mirror
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摘要 为检测超光谱成像仪指向反射镜的运动特性,设计了一种非接触式指向反射镜运动特性检测系统,在系统加工、装配前,分析各误差源对系统不确定度的影响,制定系统的误差分配方案。采用齐次坐标建立含有加工、装调误差的数学模型,通过曲线拟合得到指向反射镜转角和光斑中心位置关系曲线,依据相对位置测量误差进行误差分配,降低了加工、装调的要求,确定了系统的误差分配方案,保证指向反射镜在11°转角范围内系统不确定度小于2″,分辨率为0.5″。提出的误差分配方案大大降低了系统加工、装调难度,验证了系统设计方案的可行性。 In order to measure the motion characteristics of the pointing mirror of the hyperspectral imager, a non- contact measuring system of the pointing mirror is designed. Before processing and aligning, it is extremely necessary to make an error distribution scheme according to the system's uncertainty which is impacted by various error sources in processing and aligning. The mathematical model with errors of processing and aligning is established via the homogeneous coordinate. The curve of rotation angle and spot position is obtained by curve fitting. The error distribution scheme is determined based on the error of relative position measurement. The error distribution scheme ensures that the measurement uncertainty is 2" and the resolution is 0.5" in 11" measurement range. The error distribution scheme reduces the accuracy requirements of processing and aligning and validates the feasibility of the system design.
出处 《光学学报》 EI CAS CSCD 北大核心 2013年第10期114-119,共6页 Acta Optica Sinica
基金 国家863计划(2011AA12A103) 中国地质调查局工作项目(1212011120227)
关键词 测量 误差分配 坐标变换 指向反射镜 蒙特卡罗法 曲线拟合 measurement error distribution coordinate transformation pointing mirror Monte Carlo method curve fitting
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