Robust Stability Analysis of Unstable Second Order Plus Time-Delay (SOPTD) Plant by Fractional-Order Proportional Integral (FOPI) Controllers

被引:5
作者
Asadi, Marzieh [1 ]
Farnam, Arash [2 ,3 ]
Nazifi, Hamed [4 ]
Roozbehani, Sam [4 ]
Crevecoeur, Guillaume [2 ,3 ]
机构
[1] KN Toosi Univ Technol, Fac Electer Engn, Tehran 19697, Iran
[2] Univ Ghent, Dept Elect Energy Met Mech Construct & Syst, B-9000 Ghent, Belgium
[3] Core Lab EEDT Decis & Control, Flanders Make, B-3920 Lommel, Belgium
[4] Khaje Nasir Univ Technol Branch, Renewable Power Generat Res Grp, ACECR, Tehran 19697, Iran
关键词
robust stability analysis; FOPI controllers; unstable SOPTD plants; time-delay; SYSTEMS;
D O I
10.3390/math10040567
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
This study investigates the robust stability analysis of an unstable second order plus time-delay (SOPTD) plant by using Fractional-Order Proportional Integral (FOPI) controllers. We assume that there are simultaneous uncertainties in gain, time-constants, and time-delay of the plant. At first, a graphical method is provided for a robust stability analysis of the closed-loop system. Then, a robust stability checking function is introduced to facilitate the robust stability analysis. Additionally, new bounds are presented to reduce the computational burden for the robust stability analysis. Finally, two examples are provided to show the correctness of the proposed method.
引用
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页数:10
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