NDLI: Robust control for structural systems with parametric and unstructured uncertainties

Content Provider	IEEE Xplore Digital Library
Author	Sheng-Guo Wang Yeh, H.Y. Roschke, P.N.
Copyright Year	2001
Description	Author affiliation: Coll. of Eng., North Carolina Univ., Charlotte, NC, USA (Sheng-Guo Wang)
Abstract	Tall, slender structures and long bridges that inherit numerous uncertainties due to model errors, stress calculations, material properties, and load environments, may undergo large forces from natural hazards such as earthquakes and strong wind events. The paper develops a robust active control approach with parametric uncertainties in the system and control input, and unstructured uncertainties in disturbance input matrices based on an uncertain structural system. Special single valued decomposition (SVD) is applied to structured uncertain structures. The robust control law provides robust relative stability, an H/sub /spl infin//-norm disturbance attenuation and H/sub 2/ optimality. The H/sub /spl infin// norm of the transfer function from the external disturbance forces (e.g., earthquake, wind, and etc.) to the observed system states is restricted by a prescribed attenuation index /spl delta/. Preservation of robust H/sub 2/ optimality of uncertain structural systems is discussed. Considered uncertainties are both structured uncertainties and norm-bounded unstructured uncertainties. Numerical simulations that use the robust controller show significant reduction in vibrations. The resulting approach to robust control may be applied to analysis and design of practical structural systems.
Sponsorship	American Autom. Control Council
Starting Page	1109
Ending Page	1114
File Size	578852
Page Count	6
File Format	PDF
ISBN	0780364953
ISSN	07431619
DOI	10.1109/ACC.2001.945868
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Robust control Uncertainty Earthquakes Control systems Robust stability Attenuation Bridges Stress Material properties Hazards
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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