Modeling of a Rope-Driven Piezoelectric Vibration Energy Harvester for Low-Frequency and Wideband Energy Harvesting

Abstract

In this work, a mechanical model of a rope-driven piezoelectric vibration energy harvester (PVEH) for low-frequency and wideband energy harvesting was presented. The rope-driven PVEH consisting of one low-frequency driving beam (LFDB) and one high-frequency generating beam (HFGB) connected with a rope was modeled as two mass-spring-damper suspension systems and a massless spring, which can be used to predict the dynamic motion of the LFDB and HFGB. Using this model, the effects of multiple parameters including excitation acceleration, rope margin and rope stiffness in the performance of the PVEH have been investigated systematically by numerical simulation and experiments. The results show a reasonable agreement between the simulation and experimental study, which demonstrates the validity of the proposed model of rope-driven PVEH. It was also found that the performance of the PVEH can be adjusted conveniently by only changing rope margin or stiffness. The dynamic mechanical model of the rope-driven PVEH built in this paper can be used to the further device design or optimization.

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“…It was further observed that the piezo functionality might be easily altered by merely modifying the cable width or rigidity. 341 The future discovery of novel piezoelectric materials and flexible substrates, as well as Artificial Intelligence, may lead to the development of new technologies for self-powered retinal implants. Overall, the chip's location influences the electrodes and retinal impact capabilities.…”

Special Issue on Energy Harvesters and Self-Powered Sensors for Smart Electronics

“…Under continuous heating, such temperature-triggered cycles were repeated with electric power generation. Zhang et al [7] investigated a rope-driven piezoelectric energy harvester for broadband and low-frequency energy harvesting, which consists of a low-frequency cantilever and a high-frequency cantilever connected by a rope. After systematic simulation and experiment, the characteristics of the rope-driven energy harvester were validated, indicating that its performance could be conveniently adjusted by the rope margin or stiffness.…”