Survey on broadband techniques for vibration energy harvesting

Abstract

Various energy harvesting systems have been proposed in the last years. The use of ambient energy, such as vibration energy, has evoked great interests. Most vibration-based converters generate the maximum power only when the generator is excited at its resonance frequency. To overcome this limitation, researchers focus on strategies for increasing the working bandwidth of an energy harvester. Due to the amount of different approaches for broadband energy harvesting, we suggest a categorization. This review presents a classification of the current techniques. Every technique has its own benefits and drawbacks and is suitable for different applications. This review presents the categorization and describes each conversion technique. Typical research approaches are shown to get a better understanding of the energy harvesting techniques. The advantages and drawbacks are presented, and the suitability is shown for each category.

An Approximate Probability Density Function for Nonlinear Vibration Energy Harvesting

“…(24) with respect to 3 x results in Second, the probability and probability flux is assumed to be zero at infinite boundary, i.e., 3 2 1 3 3 2 1 3 2 1 2 1 3 3 3 3 2 1 3 3 …”

“…However, some excitations have broad bandwidth and time-varying properties in practice, e.g., wind loads and sea waves. In such a case, the linear vibration energy harvester becomes inefficient [2,3]. To overcome this limitation, the techniques of broadband vibration energy harvesting have been developed.…”

Broadband frequency response of a nonlinear resonator with clearance for energy harvesting

“…Energy harvesting based on nonlinear resonators can provide more efficient ambient energy converters for various frequencies [1][2][3][4] comparing to linear devices [5]. The role of nonlinearities [6] is important not only in broadening of frequency in the main resonance region but also in involving the subharmonic and superharmonic frequencies in multiple solutions.…”

Characterization the influences of diodes to piezoelectric energy harvester

“…The purpose of mechanical design is to increase the harvester's bandwidth, efficiency, and low frequency compatibility [1][2][3][4]. The purpose of the interface circuit is to rectify and condition the output voltage, and store and manage the electrical energy [5].…”