Abstract

Determination of the dynamic characteristics of measuring instruments based on experimental transient characteristics is associated with the problem of consideration of their inherent interferences having various origins. The presence of broadband harmonic interference, especially of a high level, can reduce the accuracy of determining the desired dynamic characteristics of measuring instruments. The purpose of this work was to demonstrate the capabilities of the spectral method for finding individual dynamic characteristics of measuring instruments using transient characteristics containing high-level harmonic interference. It is shown that the imaginary part of the complex spectral density of signal formed according to the proposed rules from the transition characteristic is insensitive to harmonic interference of any level in any frequency range. It is proposed to use this imaginary part to determine the coefficients of the desired dynamic characteristics, for example, using regression analysis. The work is illustrated by examples of spectral characteristics of signals with and without harmonic interference.

中文翻译：

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用对谐波干扰不敏感的光谱法确定测量仪器的动态特性

摘要

基于实验瞬态特性确定测量仪器的动态特性与考虑其具有各种来源的固有干扰的问题有关。宽带谐波干扰的存在，尤其是高水平的谐波干扰，会降低确定测量仪器所需动态特性的准确性。这项工作的目的是展示频谱方法使用包含高电平谐波干扰的瞬态特性寻找测量仪器的个体动态特性的能力。从过渡特性可以看出，根据提出的规则形成的信号复谱密度的虚部对任何频率范围内的任何电平的谐波干扰都不敏感。建议使用该虚部来确定所需动态特性的系数，例如，使用回归分析。该工作通过具有和不具有谐波干扰的信号的频谱特性示例来说明。