A vibration-control platform on the basis of magnetorheological elastomers

Resumo

The design of a vibration-control platform on the basis of magnetorheological (MR) elastomers is described. The platform is designed for protecting precision equipment and instruments against external vibrations at frequencies of up to 200 Hz and amplitudes of up to 100 µm. The platform contains four active dampers on the basis of MR elastomers and four elastic-support units with a mass corrector using which the platform is adjusted to a required equipment mass and a required resonance frequency. The proposed platform provides passive vibration isolation at a level of ∼10 dB at frequencies of from 0.5 to 30 Hz and vibration amplitudes of up to 500 µm. The results of experimental studies of transient processes (the minimum transient-process time is 30 ms), the transfer coefficient of the vibration-displacement amplitude, and the mechanical hysteresis are presented.