Active Vibration Protection System with Controlled Viscosity of Working Environment

The article considers new approaches to optimizing the parameters of a magnetorheological transformer (MRT). The effect of a vortex magnetic field on the sedimentation of magnetic particles in a magnetorheological fluid (MRF) is considered. The creation of such a field leads not only to a change in the viscosity of the MRF, but also to the creation of a magnetic vortex. This magnetic vortex terminates the processes of sedimentation and deposition of MRF and counteracts gravitational forces. The article presents a structural diagram of a hydromount with MRT with a coaxial throttle channel controlled by a rotating magnetic field. A mathematical description of the motion of magnetorheological media in magnetic fields of a hydromount is made using the hydrodynamic equation of motion of the medium and the Maxwell equation. The article shows that with an increase in the frequency of the input vibration signal, frequency modulation of the Umov-Poynting vector occurs. Therefore, the damping process is enriched with high-frequency components, which are actively absorbed in a viscous magnetorheological medium. Hence, a rotating magnetic field in a coaxial throttle channel contributes to more efficient damping.