Abstract: Vibration energy harvesting is one of the most promising technologies. The majority of current researchers obtain 10 mW to 100 mW power,[2] which has only limited applications in self-powered wireless sensors and low-power electronics. The vibrations in some situations can be very large, for example, the vibrations of tall Buildings , long bridges, vehicle systems, railroads, ocean waves, and even human motions.

Keywords: machines vibration, VEH, piezo-electric, vibration energy.