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Journal of Applied Nonlinear Dynamics 2(3) (2013) 303--314 | DOI:10.5890/JAND.2013.08.005

C.A. Kitio Kwuimy; C. Nataraj

Center for Nonlinear Dynamics and Control, Department of Mechanical Engineering Villanova University, 800 Lancaster Avenue, Villanova, PA 19085, USA

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Abstract

This papers considers an electromechanical butterfly valve and discusses the conditions for appearance of bistability and bursting oscillations. The critical nonlinear stiffness coefficient and inlet velocities leading to such dynamics are obtained as a function of the system parameters, and the effects of external perturbation on the bursting response of the system are illustrated. It is observed that the driving parameters and the direct current voltage strongly affect the sharpness, the number of strikes, the amplitude of the strikes and the time interval between the strikes. Combinations of large-amplitude oscillations and small- amplitude oscillations are obtained for the electric circuit, while combination of fast-slow dynamics is obtained for the mechani- cal part. The results of the paper provide potential criteria for evaluating and optimizing system performance.

Acknowledgments

This work is supported by the US Office of Naval Research under the grant ONR N00014-08-1-0435. Thanks are due to Mr Anthony Seman III of ONR and Dr. Stephen Mastro of NAVSEA, Philadelphia.

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