Design and Characteristics Analysis of Self-Powered Damper

Based on the demand of four independent in wheel motor driven electric vehicle, an innovative design of self-powered smart damper is proposed in this paper. It takes advantage of the ball sleeve to compress several piezoelectric sets, which can convert the oscillatory vibration into unidirectional movement of the generator, with the function of mechanical rectifier, can capture more energy. The damper is composed of electro rheological elastomers material, and it is parallel with the energy harvesting device on the structure to reduce the size and increase the effective stroke damper. Piezoelectric voltage is loaded to electro rheological elastomers after being processed by circuit so as to realize the self feedback control. Electro rheological elastomers model, ball pressure energy harvesting model and self feedback control of vehicle suspension model are established. The control effect of self feedback control and passive control are compared by simulation.