Purpose In this study, a hybrid vibration-based energy harvester is proposed which utilizes electromagnetic and piezoelectric transduction mechanisms. Methods The paper is divided into three parts: experimental investigation, numerical modeling and statistical analysis. In the experimental part, the system is prepared by floating a magnet inside a coiled fluid container. Then, the container is subjected to vibrations and voltage measurement is performed. Highest values for measured data in the experiments are 740 mV and 58 μW for peak-to-peak voltage and electrical power, respectively. In the second part, numerical modeling is used to investigate the effect of various parameters on the energy harvesting performance as well as to its design, analysis and prediction. Effective parameters are categorized as dimensionless numbers and simulations are designed using the response surface methodology (RSM) approach based on the central composite design (CCD) method. Results and Conclusions The results show that there are many qualitative similarities between numerical graphs and experimental data and a preliminary estimate of the probable energy harvesting can be obtained from the variations of the interface parameters. Finally, the effect of considered parameters is statistically investigated using analysis of variance (ANOVA) method. The highest contribution percentage of input parameters on the numerical results are calculated which is related to the top to bottom side length ratio of the container and its amplitude of oscillations.
