This paper presents a new self-powered hybrid electromagnetic damper that can mitigate vibration of a structure. The damper is able to switch between a power-regenerative passive mode and a semi-active mode depending on the power demand and capacity. The energy harvested in the passive mode due to suppression of vibration is employed to power up the sensing and electronic components necessary for the semi-active control. This provides a hybrid control capability that is autonomous in terms of its power requirement. The device mechanism and the circuitry that can realize this self-powered electromagnetic damper are described in this paper. The parameters that determine the device feasible force region are distinguished. The function of this proposed damper is numerically evaluated by incorporating it for structural vibration reduction in a TMD system under ground motion excitation. It is demonstrated that under a target intensity of earthquake, the damper is inclined to operate more in the semi-active mode as more power flows into the device. This performance gain is attained autonomous without the need of external power supply.
Maziar Jamshidi and Chih Chen Chang, "A new self-powered electromagnetic damper for structural vibration control," Proc. SPIE 10168, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017, 101682E (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 29, 2017; Published: 12 April 2017); https://doi.org/10.1117/12.2256657.
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