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Title: Smart magnetorheological dampers with embedded sensors for vibration control applications
Authors: Lam, KH
Or, SW 
Chan, HLW 
Chen, ZH
Ni, YQ 
Keywords: Seismic protection
Issue Date: 2007
Source: Proceedings of the 3rd International Conference on Structural Health Monitoring of Intelligent Infrastructure , Vancouver, British Columbia, Canada, 13-16 November 2007, p. 160 How to cite?
Abstract: Smart magnetorheological (MR) dampers with embedded piezoelectric transducers have been developed to provide a closed-loop vibration control of bridge cables. The smart MR damper consists of a lead zirconate titanate (PZT) piezoelectric sensor integrated with a conventional MR damping device. The piezoelectric sensor is used to sense the external excitation forces exerted on the smart damper. The sensing-while-damping function of the smart damper offers great potential for real-time cable vibration control. To optimize the performance of the smart damper, the force sensors have been fabricated using different preloading conditions. The optimal condition has been determined from the calibration of the force sensors which was performed using force-controlled tests on a Material Test System (MTS). The performance tests of the smart MR damper have been conducted by mounting the smart MR damper on a MTS operating in a displacement-controlled excitation of sine waves with different driving conditions to the smart damper. The relationship between the applied current to the smart damper and the force sensed by the piezoelectric sensor is significant to provide the closed-loop vibration control. The experimental results proved that the smart MR damper has potential in the applications of real-time, closed-loop vibration control of civil and mechanical structures.
ISBN: 978-0-9736430-4-6
Appears in Collections:Conference Paper

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