Comments on New Results on the Characterization of Strictly Positive Real Matrix Transfer Functions

• 成果类型: Editorial Material
• 署名作者: Hakimi-Moghaddam, Mojtaba; Ferrante, Augusto
• 署名单位: Quchan University of Technology; University of Padua
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2022.3218616
• 发表日期: 2023
• 页码: 1949-1951
• 关键词: Hermitian part eigenvalues; High-frequency condition (HFC); strictly positive real (SPR) systems

摘要

In this note, we address an inconsistency in our recent article (Hakimi-Moghaddam and Ferrante, 2021). In particular, we provide an example showing that Lemma III.1 of that article is not correct. We show how the statement of this lemma can be modified in order to resolve this inconsistency. We also describe how this modification impact the other results of the article. Notwithstanding the fact that Lemma III.1 plays a central role in the proof of the main result of (Hakimi-Moghaddam and Ferrante, 2021), we show that such a result is indeed correct as it may be derived by using the modified (and correct) version of the lemma. An illustrative example is provided to support the results.