Author : Nitin H. Ambhore, D. R. Pangavhane and Shyamsundar D. Hivarale

Magneto-rheological (MR) dampers are semi-active control tools that have received a lot of attention in recent years due to their structural simplicity, wide range of applications, low energy consumption, high capacity and high reliability. MR dampers are being developed for a wide variety of applications where controllable damping is desired. MR fluids represent a class of smart materials whose rheological properties change in response to the application of a magnetic field. MR fluid dampers are new type of vibration control elements, having the advantages of rapid damping and stiffness changing in the presence of an applied magnetic field. Multiple types of devices have been designed to implement this versatile fluid. Some examples of devices in which MR fluids have been employed include dampers, clutches, brakes and transmissions, polishing machines and to control gun recoil on naval gun turrets. Automobile suspension and structural vibration control systems are among the most frequent uses of such dampers. The main challenge to the expansion of using these dampers is presenting a model capable of simulating their non-linear and complex hysteresis behaviors in a suitable manner. So far many different models have been presented for simulation of hysteresis of magneto-rheological dampers.

Keywords: MR damper, nonparametric models, polynomial model.

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.2 (June- 2013)