为了提高用于激光半主动导引系统的四象限探测器对激光光斑中心定位的精度，分析了四象限探测器的定位原理，并对不同光斑模型下常用的定位算法进行了仿真分析。在对传统定位算法进行分析的基础上，针对高斯光斑模型下定位算法的不足，结合标准正态分布的特点，对高斯光斑模型下的定位算法进行了合理的改进。通过仿真分析和设计的实验验证，结果表明，改进后的高斯算法的均方根误差比传统的高斯算法减小了60.4%，在一定程度上提高了对激光光斑中心位置定位的精度和线性范围。

In order to improve the accuracy of the four-quadrant detector used in the laser semi-active guidance system to locate the laser spot center, the positioning principle of the four-quadrant detector is analyzed, and the common positioning algorithms under different spot models are simulated and analyzed. Based on the analysis of the traditional positioning algorithm, aiming at the shortcomings of the positioning algorithm under the Gaussian flare model and combining the characteristics of the standard normal distribution, the positioning algorithm under the Gaussian flare model was reasonably improved. Through simulation analysis and design experimental verification, the results show that the root-mean-square error of the improved Gaussian algorithm is reduced by 60.4% compared with the traditional Gaussian algorithm, which improves the accuracy of positioning the laser spot center position and Linear range.