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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 detect the movement characteristics of hyper-spectral imager pointing mirrors, a non-contact pointing mirror moving characteristic detection system is designed. Before the system is processed and assembled, the influence of each error source on the system uncertainty is analyzed. Error distribution scheme. The mathematical model with machining errors and loading errors is established by using homogeneous coordinates. The curves of the pointing mirrors and the spot center are obtained by curve fitting, and the error distribution is based on the relative position measurement error, which reduces the processing and setup requirements and determines The system error distribution scheme, to ensure that the pointing mirror in the 11 ° corner of the system uncertainty less than 2 “, a resolution of 0.5”. The proposed error distribution scheme greatly reduces the difficulty of system processing and assembly and adjustment, and verifies the feasibility of system design.