Active control of high frequency vibration in uncertain structures

Abdul Muthalif, Asan Gani and Langley, Robin S (2006) Active control of high frequency vibration in uncertain structures. In: The 13th International Congress on Sound and Vibration , 2-6 July 2006, Vienna, Austria.

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Abstract

The active suppression of structural vibration is normally achieved by either feedforward or feedback control. In the absence of a suitable reference signal feedforward control cannot be employed and feedback control is the only viable approach. Conventional feedback control algorithms (e.g. LQR and LQG) are designed on the basis of a mathematical model of the system and ideally the performance of the system should be robust against uncertainties in this model. The aim of this paper is to numerically investigate the robustness of LQR and LQG algorithms by designing the controller for a nominal system, and then assessing (via Monte Carlo simulation) the effects of uncertainties in the system. The ultimate concern is with the control of high frequency vibrations, where the short wavelength of the structural deformation induces a high sensitivity to imperfection. It is found that standard algorithms such as LQR and LQG are generally unfeasible for this case. This leads to a consideration of design strategies for the robust active control of high frequency vibrations. The system chosen for the numerical simulation concerns two coupled plates, which are randomized by the addition of point masses at random locations.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	3352/24596
Uncontrolled Keywords:	vibration
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User:	Ir. Ts. Dr Asan Gani Abdul Muthalif
Date Deposited:	22 Aug 2013 09:51
Last Modified:	22 Aug 2013 09:51
URI:	http://irep.iium.edu.my/id/eprint/24596

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