The generalized Nyquist stability criterion

54 次查看（过去 30 天）
Khaled Abojlala
Khaled Abojlala 2017-8-16
编辑： Andrea 2025-3-28
Hi I am trying to plot the Nyquist plot of MIMO system. any help please

请先登录，再回答此问题。

采纳的回答

Mohamed Belkhayat
Mohamed Belkhayat 2017-10-30
Once you have a MIMO matrix transfer function you can generate the plot by finding the eigenvalues of the matrix as a function of frequency. A 2x2 MIMO matrix transfer function will have 2 eigenvalues at every frequency point. The imaginary vs. the real part of the two eigenvalues will yield two loci that should always connect. This is the generalized Nyquist. I include a sample code for a textbook example in Multivariable Feedback Design by Maciejowski. Example 2.7. This example is limited to 2x2 but can be extended easily to higher dimensions.

更多回答（1 个）

Mitul Saini
Mitul Saini 2018-5-12
Is it only applicable for square matrices?
  1 个评论
Andrea
Andrea 2025-3-11
编辑：Andrea 2025-3-28
Yes but normally the open loop K*G(s) is always square for state and output feedback, also if G(s) is not.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Frequency-Domain Analysis 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by