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针对简化太阳位置算法的拟合特点,开展算法的对比模型及应用研究。模型涉及“积日基数”的最优选值、优良指标的分布规律、回归年对计算精度的影响性能、关键参数最大绝对偏差的分布规律及赤纬和时差函数的拟合性能5个方面的综合对比分析。选取王炳忠法(Wang法)、Bourges法、Spencer法等7种经典简化算法为实例,对模型展开应用研究。结果数据表明:Wang法、Bourges法和Duffie法的积日基数最优取值分别为1、1和-1,其他方法为0;在优良指标的分布上,Wang法和Brouges法占明显优势;在时差和赤纬计算上,除Wang法和Brouges法之外的5种方法均有闰年(或每隔4a)易出现最大绝对偏差的问题;在函数拟合性上,Wang法和Brouges法占有明显优势;综合对比结果显示:Wang法最优,Brouges法次之。
Aiming at the feature of simplifying the algorithm of solar position fitting, a comparative model of the algorithm and its application are studied. The model is related to the optimal value of “day of the sun ”, the distribution of good indicators, the influence of the year of regression on the calculation accuracy, the distribution of the maximum absolute deviation of the key parameters and the fitting performance of the declination and the time difference function Comprehensive comparative analysis. This paper chooses seven classical simplification algorithms such as Wang Bingzhong, Bourges and Spencer as examples to study the application of the model. The results show that the Wang, Bourges and Duffie methods have the optimal daily values of 1,1 and -1, respectively, and the other methods are 0. Wang and Brouges have obvious advantages in the distribution of good indicators. In the calculation of time difference and declination, all the five methods except Wang and Brouges have the problem of the biggest absolute deviation in leap years (or every 4 years). In terms of function fitting, Wang method and Brouges method occupy Obvious advantages; Comprehensive comparison results show that: Wang method is best, Brouges method second.