Abstract
Smart materials and structures have attracted a significant amount of attention for their vibration control potential in engineering applications. Compared to the traditional active technique, shunt damping utilizes an external circuit across the terminals of smart structure based transducers to realize vibration control. Transducers can simultaneously serve as an actuator and a sensor. Such unique advantage offers a great potential for designing sensorless devices to be used in structural vibration control and reduction engineering. The present literature combines piezoelectric shunt damping (PSD) and electromagnetic shunt damping (EMSD), establishes a unified governing equation of PSD and EMSD, and reports the unique vibration control performance of these shunts. The schematic of shunt circuits is given and demonstrated, and some common control principles and equations of these shunts are summarized. Finally, challenges and perspective of the shunt damping technology are discussed, and suggestions made based on the knowledge and experience of the authors.
Highlights
Some smart materials and structures that possess unique electromechanical characteristics have been widely used for active vibration control, such as magneto-rheological fluid damper [1], piezoelectric damper [2,3,4,5], shape memory alloy [6,7] and eddy current damper [8,9,10,11]
Shunt damping technology has been widely studied and it has shown a good potential in vibration control engineering
We summarized shunt damping control by combing piezoelectric shunt damping (PSD)
Summary
Some smart materials and structures that possess unique electromechanical characteristics have been widely used for active vibration control, such as magneto-rheological fluid damper [1], piezoelectric damper [2,3,4,5], shape memory alloy [6,7] and eddy current damper [8,9,10,11]. Over the past several years the shunt damping vibration control technique has terminals of a transducer. If a high magnetostrictive material, such as Terfenol-D, is used as a rod, the dynamic strain can be increased by 0.2% Based on this characteristic, Fukada et al [39] extended the shunt damping method from PSD to that of magnetostrictive transducers, and results implied that the stiffness can be controlled by connecting an external negative inductance circuit. This review displays a variety of the research investigations in shunt damping technique based on passive and active classification, either PSD or electromagnetic shunt damping (EMSD)
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