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Title: Non-symmetrical semi-active vibration control based on synchronized switching damping
Authors: Ji, H
Qiu, J
Zhang, J
Nie, H
Cheng, L 
Issue Date: 2014
Publisher: International Institute of Acoustics and Vibrations
Source: 21st International Congress on Sound and Vibration 2014, ICSV 2014, 2014, v. 4, p. 3078-3085 (CD-ROM) How to cite?
Abstract: An unsymmetrical switch circuit is designed for semi-active control method based on syn-chronized switching damping principle of piezoelectric actuators. A bypass capacitor and an additional switch are used to realize unsymmetrical bipolar voltage. The control logic of the switches is introduced in detail and the switched voltages, which directly influence the control performance, are derived as functions of the vibration amplitude and the outputs of the voltage sources. Experiments were carried out to verify the designed circuit and the theoretical results of the switched voltage. For simplification of experimental conditions the beam is fully clamped and the voltage is fully generated by the voltage source. The influence of the voltage source and bypass capacitor on the actuator was investigated. Experimental results show that the circuit leakage is a critical factor to the amplification of actuator voltage. The voltage ratio increases with increasing bypass capacitance, but its increasing rate decreases.
Description: 21st International Congress on Sound and Vibration 2014, ICSV 2014, Beijing, 13-17 July 2014
ISBN: 9781634392389
Appears in Collections:Conference Paper

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