Chaos control and impact suppression in rotor-bearing system using magnetorheological fluid
1 Federal Technological University of Paraná, UTFPR – Department of Mathematics, 84016-210 Ponta Grossa, PR, Brazil
2 Technological Institute of Aeronautics, ITA – Department of Mechanical Engineering, 12228-900 São Jose dos Campos, SP, Brazil
Received: 10 July 2015
Revised: 9 September 2015
Published online: 20 November 2015
In this paper a general dynamic model of a rotor-bearing system using magnetorheological fluid (MR) is presented. The mathematical model of the rotor-bearing system results from a Jeffcott rotor with two-degrees of freedom and discontinuous supports. The effect of magnetorheological fluid on vibration is investigated based on a model of a modified LuGre dynamical friction model. A comparison with equivalent rotor-bearing system is made to verify the contribution of MR in this system. In this study two different implementations of the control procedure are presented, one eliminating the chaotic behavior and the second suppressing the unbalancing vibration so as to avoid impact in rotor-bearing system. First, to control the undesirable chaos in rotor-bearing system a damped passive control methodology is used. On the other hand, to suppressing the impact vibration, the Fuzzy Logic Control is considered. Results demonstrate that undesirable behaviors of rotor can be avoided by varying the damping force.
© EDP Sciences, Springer-Verlag, 2015