A dual-beam piezo-magneto-elastic wake-induced vibration energy harvesting system for high-performance wind energy harvesting

Energy harvesting through wind-induced vibration holds great potential for using wind energy to power low-power devices. To effectively improve the working performance of energy harvesters, appropriate structural design is crucial. This video introduces a dual-beam piezomagnetoelastic energy harvesting system with wake vibration to improve the working performance of aeroelastic energy harvesters in environments with different wind speeds. The system contains two piezoelectric beams coupled by magnets (thus forming upstream and downstream energy harvesters), and a foam cylinder is attached to each beam. A corresponding dynamic model is provided, and output characteristics are obtained at different wind speeds. Results and experimental verification show that both upstream and downstream energy harvesters can realize efficient energy harvesting. When the wind speed exceeds a certain critical value, the amplitudes of the displacement and stress of the system are high. The threshold value of the wind speed is about 1.25 m/s. At a wind speed of 10.2 m/s and a magnet spacing of 20 mm, the output power of the system reaches 4.9 × 10−4 W. Furthermore, the wind speed threshold of the proposed system can be adjusted by an equivalent nonlinear restoring force. Matlab scripts, MAT data files, and CSV data used to obtain images are included, which are presented in FIG and PNG formats.