A comment on "Algorithm of robust stability region for interval plant with time delay using fractional order PI lambda D-mu controller" [Commun Nonlinear Sci Numer Simulat 17 ( 2012) 979-991]

作者：Mohsenipour Reza; Jegarkandi Mohsen Fathi^*

来源：Communications in Nonlinear Science & Numerical Simulation, 2018, 63: 202-204.

DOI：10.1016/j.cnsns.2018.03.008

• Fractional order interval plant
• Uncertain time delay
• Robust stability
• Value set

In Ref. [1], it has been claimed that the value set of a fractional order interval plant, having one uncertain time delay is a polygon. This note illustrates that this claim is not true, and in fact the value set has a nonconvex shape. Therefore, Theorem 3.1 and the stabilization algorithm presented in the reference to design a PI lambda D-mu controller, are not true.

• 出版日期2018-10