On suppression of chaotic motions of a portal frame structure under non-ideal loading using a magneto-rheological damper
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Federal University of Technology-Paraná - UTFPR, Ponta Grossa, PR
University Paulista State - UNESP, Rio Claro, SP
Federal University of ABC - UFABC, Santo Andre, SP
Journal of Theoretical and Applied Mechanics 2015;53(3):653-664
We consider chaotic motions of a portal frame structure under non-ideal loading. To suppress this chaotic behavior, a controlling scheme is implemented. The control strategy involves application of two control signals and nonlinear feedforward control to maintain a desired periodic orbit, and state feedback control to bring the system trajectory into the desired periodic orbit. Additionally, the control strategy includes an active magneto-rheological damper to actuate the system. The control force of the damper is a function of the voltage applied in the coil of the damper that is based on the force given by the controller.
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