arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2306.02016eess.SYcs.SYmath.OC
收藏

逆负虚定理

Converse negative imaginary theorems

Sei Zhen Khong, Di Zhao, Alexander Lanzon

AI总结:

本文推导了线性时不变系统的逆负虚定理,给出了反馈系统对各类负虚不确定性具有鲁棒稳定性的充要条件,并证明了考虑具有增益约束的NI系统子类的必要性。

摘要:

推导了线性时不变系统的逆负虚定理。特别地,我们提供了反馈系统对各类负虚(NI)不确定性具有鲁棒稳定性的充要条件。考虑了边际稳定NI系统和稳定严格NI系统两类不确定性,并对其静态或瞬时增益施加了限制。结果表明,对前一类系统的鲁棒稳定性蕴含严格NI性质,而对后一类系统则蕴含NI性质。我们还建立了一个不存在性结果:没有任何稳定系统能够鲁棒稳定所有边际稳定NI不确定性,从而表明在鲁棒反馈稳定性方面,NI系统的不确定性类别过大,这证明了考虑具有受约束静态或瞬时增益的NI系统子类的合理性。

英文摘要:

Converse negative imaginary theorems for linear time-invariant systems are derived. In particular, we provide necessary and sufficient conditions for a feedback system to be robustly stable against various types of negative imaginary (NI) uncertainty. Uncertainty classes of marginally stable NI systems and stable strictly NI systems with restrictions on their static or instantaneous gains are considered. It is shown that robust stability against the former class entails the strictly NI property, whereas the latter class entails the NI property. We also establish a non-existence result that no stable system can robustly stabilise all marginally stable NI uncertainty, thereby showing that the uncertainty class of NI systems is too large as far as robust feedback stability is concerned, thus justifying the consideration of subclasses of NI systems with constrained static or instantaneous gains.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑