Design and experimental analysis of self-sensing SSDNC technique for semi-active vibration control

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A semi-active vibration control technique using nonlinear synchronized switch damping on negative capacitance (SSDNC) is proposed in this article. SSDNC, as one of the effective nonlinear vibration damping techniques, has been intensively investigated and discussed in recent years. In comparison with the classical SSDNC technique, the proposed self-sensing approach realizes the SSDNC technique by using analog circuits, which require neither external sensors nor controllers. In particular, the stability of the switching shunt circuit using negative capacitance (NC) is addressed. The theoretical and experimental analysis reveals that the saturation of the operational amplifier in synthetic NC can prevent the proposed SSDNC circuit from trapping into instability and yielding the best attenuation performance. The final experiments show that the proposed approach exhibits excellent single-mode damping performance and is sufficiently robust.

» Author: Wei Tang, Li-bo Wang, Yu-mei Ren, Bin Bao and Jing-jun Cao

» Reference: Wei Tang et al 2018 Smart Mater. Struct. 27 085028

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