摘要
在对数-反对数运算式的基础上,提出了一种在宽频带范围内对非线性误差进行校正的新方法.该方法利用最小二乘法拟合出以输入电压x和频率f为自变量的多项式以减小测量误差.通过Matlab软件对实验测量结果进行校正.实验表明,在50~3.0×104Hz的频率范围内,校正准确度可达0.075%.
Based on the log and antilog transport equation, a new nonlinear error compensation method within the scope of the wide band is proposed. In order to reduce the measurement error, least-square fitting method is applied. MATLAB simulation result shows that the proposed method is effective and reliable, and the accuracy can reach 0. 075% in the frequency range of 50-30 000 Hz.
出处
《上海电力学院学报》
CAS
2017年第1期77-80,共4页
Journal of Shanghai University of Electric Power
关键词
有效值转换器
误差校正
最小二乘法
RMS converter
error calibration
method of least squares polynomial
