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Flexure control using piezostack actuators: design and implementation

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3 Author(s)
Kermani, M.R. ; Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont., Canada ; Patel, R.V. ; Moallem, M.

In this paper, the application of high control authority piezostack actuators (PSAs) for active vibration control of large-scale flexible structures is studied. The idea is to add PSAs at appropriate locations of a flexible structure in order to strengthen its stiffness characteristics. In this regard, a flexible link of a macro-micro manipulator system actuated with PSAs is considered. The design of a mechanism for converting the force produced by a PSA to a bending moment is presented and a model for a system consisting of a flexible beam and a PSA is obtained. To this end, the solution of the governing partial differential equation with nonhomogeneous boundary conditions is obtained. Using singular value decomposition of the controllability Grammian of the system, optimum values for actuator parameters are obtained. The experimental results confirm that the suggested method can open up new possibilities in active vibration control of large-scale structures that require a large amount of control authority.

Published in:

Mechatronics, IEEE/ASME Transactions on  (Volume:10 ,  Issue: 2 )

Date of Publication:

April 2005

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