The Response Analysis of Multi-Field Coupled Piezoelectric Energy Harvester Under White Gaussian Noise Excitation

Due to the large vibration of fully mechanized mining equipment, using multi-field coupled piezoelectric energy harvester will efficiently solve the difficulty of wireless monitoring power supply by capture vibration energy. The study of dynamic characteristics of the MPEH under random excitation can effectively guide the design and optimization of the piezoelectric energy harvester. We make investigation of the distance effect of magnet, noise spectrum density and damping on the dynamic response characteristics of the MPEH under longitudinal and horizontal excitation. The results show that narrowing magnetic distance under longitudinal excitation, reducing damping ratio or increasing excitation spectral density can enhance the probability of large period vibration and increase the average power of the system.