Non-symmetrical semi-active vibration control based on synchronized switching damping

Hongli Ji; Jinhao Qiu; Jin Zhang; Hong Nie; Li Cheng

doi:10.1117/12.2045878

1 April 2014 Non-symmetrical semi-active vibration control based on synchronized switching damping

Hongli Ji, Jinhao Qiu, Jin Zhang, Hong Nie, Li Cheng

Proceedings Volume 9057, Active and Passive Smart Structures and Integrated Systems 2014; 90571R (2014) https://doi.org/10.1117/12.2045878
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

An unsymmetrical switch circuit is designed for semi-active control method based on synchronized 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. Simulations were carried out to verify the design circuit and the theoretical results of the switched voltage. The voltage ratio increases with increasing bypass capacitance, but its increasing rate decreases. The results show that large bypass capacitor is needed to realize a voltage ratio of 3, which is common in some piezoelectric actuator such as MFC.

Citation Download Citation

Hongli Ji, Jinhao Qiu, Jin Zhang, Hong Nie, and Li Cheng "Non-symmetrical semi-active vibration control based on synchronized switching damping", Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90571R (1 April 2014); https://doi.org/10.1117/12.2045878

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