鉴于近年来对相关,和动态误差的评价问题的讨论又趋于热化,这里仅就笔者在教学和科研工作过程中的体会谈一些不成熟的看法,希冀就教于同行。一、关于波形测试不失真条件把x(t)和y(t)看作是单输入、单输出线性系统的输入与输出信号,考虑到实际线性系统具有时延效果,记为t_o,再把a看作是非常量,则理想情况下:a=1, t_o=0,输出等同于输入或t_o=0,a=常量,输出完全是输入波形的纯放大。非理想情况下两者的差异就应是误差,在动态测试条件下就应引起动态误差。允许使输出y(t)时差后与x(t)相比较,是波形不失真考察,两者作无时差的直接比较,是绝对意义下的动态误差表达,可分别表示为 In recent years, the discussion on the related and dynamic error evaluation tends to be hotter. Here I will talk about some immature opinions about my experience in the teaching and research work in the hope of teaching to my colleagues. First, on the waveform test is not distorted Conditions x (t) and y (t) as a single input, single output linear system input and output signals, taking into account the actual linear system has a delay effect, denoted t_o, then a is considered as a non-constant, the ideal case: a = 1, t_o = 0, the output is equal to the input or t_o = 0, a = constant, the output is pure amplification of the input waveform. Non-ideal circumstances should be the difference between the two errors in the dynamic test conditions should cause dynamic error. Allow the output y (t) time difference compared with x (t), the waveform is undistorted investigation, the two for direct comparison without time difference, is the absolute dynamic error expression can be expressed as