期刊
IET CONTROL THEORY AND APPLICATIONS
卷 4, 期 11, 页码 2631-2638出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-cta.2009.0429
关键词
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资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/F06022X/1]
- Royal Society
- EPSRC [EP/F06022X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F06022X/1] Funding Source: researchfish
Real parametric uncertainty is common in many applications. In this study, the authors analyse the robust stability of feedback loops of single-input single-output systems with negative imaginary frequency response subject to real parametric uncertainty. A recent result on the stability of such feedback loops is specialised to this case, resulting in a very simple stability condition dependent only on the steady-state parameters of the systems. The structured singular value for this system type is also obtained, and it is shown that it yields related but more constrained, easily computable stability guarantees. In a numerical example, the robust stability of a control loop for a DC machine subject to real parametric uncertainty is analysed.
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