计量学报2024，Vol.45Issue(4)：586-593,8.DOI:10.3969/j.issn.1000-1158.2024.04.19
四参数正弦曲线拟合的快速算法
The Fast Algorithm of Sine Wave Curve-fitting
摘要
Abstract
The running time of the four-parameter sine wave curve fitting software is studied,and a quantitative evaluation method of the software fitting time is proposed.The influence of the time used for the four-parameter sinusoidal curve fitting is quantitatively evaluated on the different factors and conditions such as the length of the sequence,the number of signal cycles contained in the sequence,the amplitude of the sine wave,the phase,the DC component,and the number of A/D bits,and the law of the fitting time varying versus each factor is obtained.Aiming at the main factors affecting the software running time,a fast fitting method is proposed to reduce the fitting time by reducing the length of the fitting sequence.They are direct sequence interception method and secondary sampling method.The validity and feasibility of the method are verified by a group of experiments,the conclusion is that the secondary sampling method is superior to the direct interception method.Both of them all can be used for fast calculation of four-parameter sine fitting.关键词
无线电计量/正弦波/曲线拟合/二次抽样法/序列截取法/参数估计/校准Key words
electronic metrology/sine wave/curve fit/secondary sampling method/sequence interception method/parameter estimation/calibration分类
通用工业技术引用本文复制引用
梁志国..四参数正弦曲线拟合的快速算法[J].计量学报,2024,45(4):586-593,8.基金项目
国家重点研发计划(2017YFF0206202) （2017YFF0206202）
