首页   按字顺浏览 期刊浏览 卷期浏览 Plant directionality, coupling and multivariable loop-shaping
Plant directionality, coupling and multivariable loop-shaping

 

作者: J. S. FREUDENBERG,  

 

期刊: International Journal of Control  (Taylor Available online 1990)
卷期: Volume 51, issue 2  

页码: 365-390

 

ISSN:0020-7179

 

年代: 1990

 

DOI:10.1080/00207179008934071

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

We study the multivariable loop-shaping problem when the plant is ill-conditioned and feedback properties at both plant input and output are of interest. Directionality and coupling are described, using the singular value decomposition and principal angles between high- and low-gain subspaces. Our first results are new first-order approximations to feedback properties at one loop-breaking point in terms of the open loop transfer function at that point. Secondly, we study the relation between feedback properties at different loop-breaking points in the event that the plant is ill-conditioned. The nominal relation is studied first. Then robustness is studied, using a first-order approximation to feedback properties at one point with respect to uncertainty at the other. This analysis yields conditions that must be satisfied by feedback properties at one point to prevent poor feedback properties at the other. Finally, these two sets of results are combined to show how feedback properties at both points may be manipulated by shaping the open loop transfer function at one point.

 

点击下载:  PDF (854KB)



返 回