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http://dx.doi.org/10.5000/EESK.2006.10.6.093

Stability of Saturation Controllers for the Active Vibration Control of Linear Structures  

Moon, Seok-Jun (한국기계연구원)
Lim, Chae-Wook (한국자동차부품연구원)
Huh, Young-Chul (한국기계연구원)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.10, no.6, 2006 , pp. 93-102 More about this Journal
Abstract
Control input's saturation of active control devices for large structures under large external disturbances are often occurred. It is more difficult to obtain the exact values of mass and stiffness as structures are higher. The modelling errors between mathematical models and real structures must be also included as parameter uncertainties. Therefore, in active vibration control of civil engineering structures like buildings and bridges, the robust saturation controller design method considering both control input's saturation and parameter uncertainties of system is needed. In this paper, stabilities of linear optimal controller LQR, modified bang-bang controller, saturated sliding mode controller, and robust saturation controller among various controllers which have been studied and applied to active vibration control of buildings are investigated. Especially, unstable phenomena of the LQR, the modified bang-bang controller and the saturated sliding mode controller when the control input is saturated or parameter uncertainties exist are presented to show the necessity of the robust saturation controller. The robust stability of the robust saturation controller are shown through a numerical example of a 2DOF linear vibrating system and an experimental test of the two-story structure with an active mass damper (AMD).
Keywords
saturation controller; control input's saturation; parameter uncertainty; stability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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