Development and Control Experiments of MR-Fluid Actuator.

Abstract

Device in human machine interface such as interactive force display system requires not only high power and quick response, but also safety for human. Magnetorheological (MR) fluids are materials that change their rheological behavior by an applied magnetic field. The devices using MR fluids have an ability to provide high torque, low inertia, safe device and simple interface. In this study, we propose the magnetic circuit method to develop an actuator using MR fluid. The magnetic characteristics is analyzed by means of the finite element method. In order to investigate the characteristics of the developed MR fluid actuator, the experiments are examined. Finally, the torque control system is constructed and the response of torque is improved.