求相量幅值的一种较精确快速算法

A Method With Better Accuracy And Speed For Calculating The Amplitude Of Phase

在工业过程控制领域 ,经常要涉及求相量幅值的计算 ,如求电压的幅值、电流的幅值等。而在求相量幅值的过程中 ,不可避免地要遇到开平方根的问题 ,由于现有的智能装置的中央处理器多数都不能支持开方运算 ,所以常常为开方计算而花费大量的宝贵时间。现有的各种算法 ,往往难以做到计算精度和计算速度的统一 ,因此 ,必须找到一种既有较高计算精度又能满足计算速度要求的算法。

Calculating the amplitude of phase is frequently confronted in area of industrial control,for example,such as the amplitude of voltage and current,etc.And the problem of figuring out the square root is bound to meet in the course of calculating the amplitude of phase.As CPU in many intelligent devices can not calculate square root directly,so it often takes lots of valuable time to do such calculating.Algorithms available are not satisfying ,therefore,a algorithm with better accuracy and speed should be found.