Several researchers have investigated the vibration based energy harvesting over the last few decades, with the ultimate goal of powering small electronic components (such as wireless sensors) by using the vibration energy available in their environment. Of all the basically available transaction mechanisms that can be used for the vibration-to-energy conversion, piezoelectric transducer has received the most attention in the literature. Due to their high power densities and ease of application, the Piezoelectric materials are preferred for energy harvesting.