Abstract
Mag can be used not only as controllable damping devices but also to emulate a controllable positive or negative stiffness in combination with the dissipative force. However, the dissipative nature of MR dampers constrains the stiffness control. This work formulates the problem of combined stiffness and damping control with MR dampers if the damper is subjected to pure harmonic motion. A new method is presented that ends up in precise stiffness emulation with MR dampers, also when the sum of the stiffness and dissipative forces is constrained by the semi-active nature and residual force of MR dampers. The new control concept is applied to a semi-active tuned mass damper with an MR damper (MR-STMD). The numerical and experimental results demonstrate that the MR-STMD outperforms the passive TMD significantly.
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Acknowledgements
This research was supported by AGH University of Science and Technology, Department of Process Control, Krakow, Poland (statutory research funds No. 11.11.130.560) and Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland. The authors gratefully acknowledge the technical support of the industrial partner Maurer Söhne GmbH & Co. KG, Munich, Germany.
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Maślanka, M., Weber, F. (2013). Precise Stiffness Control with MR Dampers. In: Catbas, F., Pakzad, S., Racic, V., Pavic, A., Reynolds, P. (eds) Topics in Dynamics of Civil Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6555-3_8
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DOI: https://doi.org/10.1007/978-1-4614-6555-3_8
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