PASSIVE INERTIAL AMPLIFICATION FOR ENHANCED LOW-FREQUENCY VIBRATION ENERGY HARVESTING

This paper presents a comprehensive experimental investigation of a vibration energy harvesting system incorporating an inertial amplification mechanism. Conventional linear vibration energy harvesters suffer from narrow bandwidth and poor performance in low-frequency and broadband excitation environments. To overcome these limitations, a dual pendulum electromagnetic energy harvester coupled through a geometric inertial amplifier and a low stiffness coupling spring is proposed. The inertial amplifier introduces acceleration-dependent inertial forces that magnify relative motion without increasing physical mass, thereby significantly improving electromechanical conversion efficiency. Experimental results shown 80–150% improvement in harvested power compared to uncoupled systems. The proposed passive inertial amplification approach provides a scalable, efficient, and robust solution for low-frequency vibration energy harvesting. Keywords: Inertial amplifier, Energy Harvesting, Pendulums, Coupling, electromagnetic