Board multimodal vibration control using piezoelectric synchronized switch damping techniques

Several types of vibration control using piezoelectric materials exist. The method used here is Synchronized Switching Damping (SSD). It offers several advantages, for example a multimodal damping is achievable without complex circuits. This paper deals with the application of the SSD techniques to the vibration control of a clamped board. An example of possible application is an embedded electronic Printed Circuit Board. The experimental structure is exposed. A model taking into account the multimodal behaviour of the structure is then developed. After that, two different improvements are presented in order for the SSD techniques to accept a multimodal excitation. Finally, theoretical and experimental results are compared. Both show an attenuation of, respectively, 20 dB, 6 dB and 8 dB on the three first flexion modes of the board simultaneously.