To reduce noise and vibration harshness in automobile, a prototype of active engine mount(AEM) with magnetic actuator is developed. The AEM is designed based on hydraulic engine mount so that it can act as a passive hydraulic engine mount, in case when it is out of order. In the process of AEM design, a dynamic model, which describes the dynamic characteristics of the AEM, is suggested; the magnetic actuator is designed to meet the design criteria; the analog control circuit is constructed, which consists of PD controller with lead compensator for compensation of the nonlinearity in the magnetic force; and the motion of the decoupler is determined so that the transmitted force through the AEM vanishes.
Experimental results show that the AEM model is suitable for predicting the dynamic behavior of the prototype. And it is also experimentally verified that the AEM is capable of reducing significantly transmitted force.
