Dear Colleagues,

Energy harvesting is an important developing technology of the twenty-first century. It can be defined as the gathering of naturally available energy for local use. Mechanical vibration energy harvesting (EH) is accomplished by some category of transduction mechanisms. The commonly used vibration-based EH mechanisms are electromagnetic (EM), triboelectric (TE), and piezoelectric (PE), among which EM are the most common approaches. Electromagnetic energy harvesting can utilize the relative movement between its magnet and coil and it offers a high-efficiency energy conversion and a very low-frequency operation due to the simple mechanical-resonator composition of the device.

The mechanical vibration sources contain a vibrating structure, a human body movement, water/air flow-induced vibration, etc. The features (nature, amplitude, and frequency) of the mechanical excitation depend on the vibration sources. Therefore, the harvesters for vibration EH must be appropriate for the vibration characteristics to work successfully and efficiently. Maximum mechanical vibration-based EHs based on the mechanisms of resonance condition can be investigated as a mass-spring-damper system, and deliver maximum energy under resonant conditions. Using low-frequency vibrations for EH is attractive due to its availability throughout the ambient environment. However, significant power generation at low-frequency vibrations at fixed acceleration amplitude is challenging because the frequency decreases with the decrease in power flow.

This challenge can be overcome using frequency wideband mechanisms, for example, nonlinear springs, multi-frequency harvesters, harvester array, mechanical stoppers, and frequency tunable mechanisms.

The Special Issue will present recent developments and analyze, model, and implement suitable and reliable mechanical vibration electromagnetic EHs to scavenge significant power from low-frequency vibrations sources.

Dr. Md Salauddin
Guest Editor

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• Electromagnetic energy harvesters
• MEMS-based electromagnetic energy harvesters
• Miniaturized electromagnetic energy harvesters
• Wind-driven electromagnetic energy harvesters
• Springless electromagnetic energy harvesters
• Gear module
• Rotational
• Mechanical vibration energy harvesters
• Halbach magnets array
• Low-frequency vibration
• Human-body-induced vibration
• Wideband electromagnetic energy harvesters
• Frequency tuning
• Multi-frequency
• Non-linear system
• Non-resonant
• Multidirectional energy harvester
• Wearable and portable smart electronic devices applications
• Biomedical applications
• Healthcare and environmental monitoring applications
• Human–machine–interface applications
• Self-powered sensors
• IoT applications