2 papers
math.OC2026
Positive Damping Region: A Graphic Tool for Passivization Analysis with Passivity Index
Xiaoyu Peng, Xi Ru, Zhongze Li +3
This paper presents a geometric framework for analyzing output-feedback and input-feedforward passivization of linear time-invariant systems. We reveal that a system is passivizabl…
eess.SY2026
Matrix-Valued Passivity Indices: Foundations, Properties, and Stability Implications
Xi Ru, Xiaoyu Peng, Xinghua Chen +3
The passivity index, a quantitative measure of a system's passivity deficiency or excess, has been widely used in stability analysis and control. Existing studies mostly rely on sc…