Enhanced synchronized switch damping control to cancel out the beating phenomenon

Gabriele Cazzulani; Marco Costantini; Francesco Braghin

doi:10.1117/12.2259942

11 April 2017 Enhanced synchronized switch damping control to cancel out the beating phenomenon

Gabriele Cazzulani, Marco Costantini, Francesco Braghin

Proceedings Volume 10164, Active and Passive Smart Structures and Integrated Systems 2017; 1016420 (2017) https://doi.org/10.1117/12.2259942
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

Synchronized Switch Damping control is one of the most interesting solutions for vibration suppression proposed in the last years. It is based on the electromechanical coupling provided by piezoelectric actuators. By connecting the piezoelectric actuator to a shunting circuit (typically a RL one) and properly switching between open and closed circuit, an equivalent hysteresis cycle is created and the structure energy is dissipated. It is known that, in order to maximize the damping effect the resistance of the circuit must be reduced. Anyway, as shown in literature, this effect is limited by the presence of a beating effect when the resistance is lower than a certain threshold. The aim of this paper is to analyse the beating phenomenon in order to propose new solutions to cancel it. The paper will show some innovative solutions modifying the shunting circuit to avoid the beating phenomenon and thus increase the control performance. These solutions will be described from a theoretical point of view and then tested to demonstrate their effect.

Citation Download Citation

Gabriele Cazzulani, Marco Costantini, and Francesco Braghin "Enhanced synchronized switch damping control to cancel out the beating phenomenon", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 1016420 (11 April 2017); https://doi.org/10.1117/12.2259942

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