ER 유체와 압전 작동기를 이용한 엔진마운트의 모델구성 및 성능해석

This paper presents a new prototype of an engine mount for a passenger vehicle featuring ER(electro-rheological) fluids and piezoelectric actuators. A mathematical model of the proposed engine mount is derived using the bond graph method which is inherently adequate to model the interconnected hydro-mechanical system. In the low frequency domain, the ER fluid is activated upon imposing electric field for vibration isolation while the piezoactuator is employed in the high frequency domain. On-off control algorithm is formulated for the ER fluid, and the H_∞ control technique is adopted for the piezoactuator. Computer simulation is undertaken in order to demonstrate the isolation effect of the engine mount over wide operating frequency range.