다물리 시뮬레이션을 통한 차량용 압전 유압 완충기에 대한 연구

A Piezoelectric Energy Harvesting Shock Absorber (PEHSA) System of a Vehicle is developed and analyzed. While driving a vehicle, only about 20% of fuel energy is consumed for driving to overcome air drag force and friction between the tires and the road. In particular, vibration energy caused by a bumpy road, vehicle speed, acceleration, deceleration, braking, steering, etc, is dissipated by shock absorber in the vehicle suspension. The objective of this paper is to develop a new suspension system of the vehicle including a shock absorber combined with piezoelectric materials as an energy harvester which transforms vibration energy to electrical energy. The multi-physics simulation was performed using Comsol Multiphysics for expecting the characteristics of the PEHSA system.