摘要
分数阶控制系统的特征根方程多为复变量S的无理多项式,将无理多项式转化为有理多项式非常困难。本文通过考察控制系统的频率特性,提出利用Nyquist判据和对数频率稳定判据来判断分数阶控制系统的稳定性。
Most of the characteristic equations of fractional order control systems are irrational polynomials of complex variable S,and it is very difficult to convert from irrational polynomial to rational polynomial. Through investigating the frequency characteristic of fractional order control systems,Nyquist criterion and logarithmic-frequency criterion are presented to find out the stability of fractional order control systems.
出处
《河南科技大学学报（自然科学版）》
CAS
2007年第2期33-35,共3页
Journal of Henan University of Science And Technology:Natural Science
基金
河南科技大学科研基金项目(2004QN025)
关键词
分数阶控制系统
频率特性
稳定判据
Fractional order control systems
Frequency characteristic
Stability criterion
