Type Number Based Steady-State Error Analysis on Fractional Order Control Systems

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• 作者：Jinwen Pan ; Qing Gao ; Jianbin Qiu and Yong Wang
• 刊名：Asian Journal of Control
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：19
• 期：1
• 页码：266-278
• 全文大小：891K
• ISSN：1934-6093

文摘

In this paper, steady-state error of fractional order control systems (FOCSs) is analyzed based on the concept of type number. Some practical definitions of the reference and the error for FOCSs with non-unity feedback are first given. Based on these definitions, the type number concept is first introduced to FOCSs with non-unity feedback. Then steady-state error of various types of FOCSs are analyzed respectively via type number concept. It is also shown that FOCSs with type number more than 1 are not able to track particular reference without changing the sign of the tracking error.