CAJ | 학술논문

为减小象限探测器输出信号非线性误差对系统测控精度的影响,文中提出了探测器最大线性工作区间的匹配条件,以及分段线性化的探测器输出特性优化方法.通过光能积分建立象限探测器输出信号数学模型,分析了输出信号线性特性与光斑和光敏面半径比、信号采样精度、象限间光电特性均匀性等之间的关系,给出对应探测器输出最优线性特性的光斑和光敏面半径比值,采用分段线性化方法拟合探测器输出特性参数.仿真说明,与多点标定、全区间最小二乘拟合相比,该方法将探测器输出线性区间内最大、平均非线性误差降低至1/10,相应地在探测器光敏面积一定、测量精度不降低的条件下,将探测器线性区间扩展了20%～30%.
위감소상한탐측기수출신호비선성오차대계통측공정도적영향,문중제출료탐측기최대선성공작구간적필배조건,이급분단선성화적탐측기수출특성우화방법.통과광능적분건립상한탐측기수출신호수학모형,분석료수출신호선성특성여광반화광민면반경비、신호채양정도、상한간광전특성균균성등지간적관계,급출대응탐측기수출최우선성특성적광반화광민면반경비치,채용분단선성화방법의합탐측기수출특성삼수.방진설명,여다점표정、전구간최소이승의합상비,해방법장탐측기수출선성구간내최대、평균비선성오차강저지1/10,상응지재탐측기광민면적일정、측량정도불강저적조건하,장탐측기선성구간확전료20%～30%.
To reduce influence of quadrant detector output signal nonlinear error on the system precision, a matched condition was given to ensure maximum linear interval of detector output signal, and characteristic optimization of detector output signal by subsection linearization method was put forward. In the paper, a mathematical model of quadrant detector output signal was established by light energy integral. Based on the model, the relations were analyzed between linear characteristic of signal with radius ratio of spot to photosensitive area, signal sampling precision and non-uniform of photoelectric transform coefficient and so on. Then, matched condition was acquired which is most proper for radius ratio of spot to photosensitive area corresponding to maximum linear interval of detector' output signal. And the optimum linearity characteristic parameters of detector' signal were gotten by subsection linearization fitting. The simulation result shows that, compared with multi-calibration and least square fitting in entire linear interval methods, max and mean of nonlinear errors in entire linear interval are nearly reduced to 1/10 of the method's mentioned previously, and accordingly, the linear interval of detector is expanded 20%～30% under the same condition.