A Novel Energy-Harvesting Rotational Inertial Dual-Tuned Mass Damper with Semi-Active Control for Human-Induced Structural Vibration Suppression

This study proposes a novel energy-harvesting rotational inertial dual-tuned mass damper (EH-RIDTMD) integrated with a semi-active damping control strategy, for the simultaneous human-induced vibration mitigation and energy harvesting in large-span floors. The system features a dual-tuned mechanical design combined with an electromagnetic damper that employs a ball-screw transmission mechanism and a buck-boost converter circuit. Based on theoretical modeling and Simulink co-simulation, this study analyzes the electromechanical coupling characteristics and uncovers the frequency-dependent damping response behavior governed by four fixed points in the acceleration spectrum. Subsequently, it proposes a frequency-driven semi-active control protocol that achieves real-time damping adaptation through duty cycle modulation, enabling effective vibration suppression while preserving energy harvesting capability. Comparative analysis demonstrates the semi-active EH-RIDTMD outperforms passive designs in sustained vibration control, particularly outside the frequency fixed-point region, with the harvested energy capable of powering its control circuitry. The proposed solution addresses critical challenges of conventional TMD systems by integrating mass amplification, adaptive damping, and sustainable energy recovery in space-constrained applications.