Comments on “Robust Stability and Stabilization of Fractional-Order Interval Systems With the Fractional Order src='/images/tex/451.gif' alt='alpha '> : The src='/images/tex/24533.gif' alt='0< alpha < 1'> Case”

摘要

This note considers the work entitled “Robust Stability and Stabilization of Fractional-Order Interval Systems with the Fractional Order : The Case” by Lu and Chen, where the authors meant to provide sufficient and necessary conditions for stability of fractional-order linear-time-invariant interval systems. As this note proves, conditions are only sufficient, since necessity relies unsuitably on the certain case. An example is provided.