频率响应法中相频特性计算式的错误与修正

An error of the formula of phase frequency response in frequency response approach and its correction

文章指出在控制理论的频率特性分析方法中 ,被普遍用来表示相频特性计算的算式是错误的。它仅仅可以用来粗略地表达幅、相频与实、虚频之间的一种转换关系 ,而不能真正用于计算 ,因为它使所有的计算结果全都落在一个不适当的主值范围内。

In the frequency response approach of control theory, the formula of phase frequency response is erroneous. It only makes a rough show of transform relation between amplitude frequency and phase frequency or between real frequency and imaginary frequency,and may not be used in calculation because whole calculations are within an inadequate main value range. A new correct formula is proposed.