The damping device based on magnetoactive elastomer

In this work, the potential of magnetoactive elastomers for the use in active-damping devices is discussed. The compression characteristics of the elastomer in an alternating magnetic field have been preliminary investigated to obtain an estimate for the potential dynamic parameters of the proposed device. According to the obtained dependence, the amplitude of the reaction decreases with the increasing frequency. This is determined by the frequency characteristic of the elastomer as well by some losses of current in the coil and core of the electromagnet. The stiffness of the proposed device for various levels of the control signal has been also investigated. For the largest control signal of 2 A the stiffness of the damper is about 5 N/mu m. The experimental studies of the transition process of the damper as a function of an applied external load (positioned at a zero point after loading) allow to test the time of response of the device, which does not exceed 500 ms.