Controllable Electro- and Magnetorheological Damper for Oscillation Reduction of a Stepper Motor

We designed and constructed an electrorheological (ER) and a magnetorheological (MR) damper to reduce the oscillations of the rotor of a stepper motor after positioning. The effectiveness of the MR and ER dampers were measured with an electronic unit – designed for this work –attached on one end of the shaft of the (double-shaft) rotor. The unit contained a digital accelerometer, some data acquisition and signal condition circuits, a battery for power supply, and a radio frequency module for transmitting the measured data to a processing software implemented in LabVIEW. Settling times of the oscillations at different applied field strengths were recorded and compared to results of simulations performed in Simulink

Keywords:

stepper motor , electrorheological fluid , magnetorheological fluid , electrorheological damper , magnetorheological damper