Modelling and Control of a Magneto-Rheological Vibration Damper

摘要

In this report, the authors describe a study to investigate the feasibility of developing a controllable vibration isolator based upon an MR squeeze-flow damper. The experiments demonstrate conclusively that it is feasible to control the transmissibility of a vibration isolator by manipulating the current supplied to an MR damper. The results also show that significant electromagnetic forces are generated by the damping device in the absence of MR fluid. There are two important implications of this latter result. First, in some applications, purely electromagnetic control of transmissibility may be possible - Second, electromagnetic forces do need to be included in an effective mathematical model. The available mathematical model was used in a numerical study to examine feedback control of the vibration isolator. The study shows that, using a simple switching strategy, significant performance gains might be available.