Loop phase margins

Qing Guo Wang, Zhen Ye, Wen Jian Cai, Chang Chieh Hang

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


The stabilizing ranges of decentralized PID parameters for MIMO systems are discussed in the previous chapter as well as the loop gain margins. This chapter will continue the stability margin discussion but focus on the loop phase margins of MIMO systems. Unlike the loop gain margins that corresponds to the stabilizing range of multi-loop P control, loop phase margins are related to multi-loop phase characteristics and not effected by P control. This gives additional difficulty in their determination. Nevertheless, two methods, respectively in time and frequency domain, are presented under the framework of LMI or constrained optimization.

Original languageEnglish
Title of host publicationPID Control for Multivariate Processes
Number of pages25
Publication statusPublished - 2008
Externally publishedYes

Publication series

NameLecture Notes in Control and Information Sciences
ISSN (Print)0170-8643

ASJC Scopus subject areas

  • Library and Information Sciences


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