NDLI: H$_{∞}$ drift control of time-delayed seismic structures

Content Provider	Springer Nature Link
Author	Chang, Chang Ching Lin, Chi Chang
Copyright Year	2009
Abstract	In this paper, an optimal H $_{∞}$ control algorithm was applied to the design of an active tendon system installed at the first story of a multi-story building to reduce its interstory drift due to earthquake excitations. To achieve optimal control performance and to guarantee the stability of the control system, an optimum strategy to select control parameters γ and α was developed. Analytical expressions of the upper and the lower bounds of γ and α were obtained for a single degree-of-freedom system with state feedback control. The selection ranges for both γ and α are graphically defined so that the controlled system is always stable and the control performance is better than by the conventional LQR control algorithm. Numerical results from a controlled three-story building under real earthquake excitations demonstrate that the peak first interstory drift can be significantly reduced with maximum control force around 10% of the building weight. An optimum design flow chart was provided. In addition, for a time-delayed structure, this study gave explicit formulae to calculate the critical values of γ and α. The system stability and control performance can thus be guaranteed even with time delay.
Starting Page	617
Ending Page	626
Page Count	10
File Format	PDF
ISSN	16713664
Journal	Earthquake Engineering and Engineering Vibration
Volume Number	8
Issue Number	4
e-ISSN	1993503X
Language	English
Publisher	Institute of Engineering Mechanics, China Earthquake Administration
Publisher Date	2010-01-20
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	H$_{∞}$ control time delay stability analysis active control active tendon system state feedback control Vibration, Dynamical Systems, Control Civil Engineering Geotechnical Engineering
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geophysics Mechanical Engineering Geotechnical Engineering and Engineering Geology Civil and Structural Engineering

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