Active vibration control of vehicle engine-body system using Hinfin control method

Engine mounts have great effects on the noise and vibration harshness (NVH) characteristics in automobiles. Nowadays the NVH characteristics is becoming a very sensitive issue in the design of passenger cars and thus engineers tend to pay much attention to development of better mounting methods/devices than ever. A prototype active engine mount (AEM) system was developed to improve the NVH characteristics while maintaining high static stiffness to support the engine load. The AEM consists of a conventional hydraulic engine mount and an internal electromagnetic actuator. The robust H_infin controller was adopted to cancel out the force transmitted through the AEM. The experimental result confirmed that can control unwanted vibration from the engine operation by using active mounts system