Dynamic interaction of energy-harvesting backpack and the human body to improve walking comfort

Vibration energy harvesting from backpacks has the potential to generate electrical power while leading no significant user metabolic cost increase. Many researchers have invented different energy-harvesting backpacks, but dynamics between human body and backpack not been studied thoroughly in literature. The goal of this paper is investigate dynamic interaction improve comfort. amplitude phase force transmitted are characterized ground reaction forces (GRF) after wearing detail. It found that tuning parameters can reduce GRF push-off (when muscle injects into body) potentially System performance optimized based on walking comfort criteria. Three i.e., fixed, SDOF, 2DOF-linear, 2DOF-with-MMR analyzed compared. tradeoff analyzed, guidelines for design summarized. mechanical-motion-rectifier-based system peak by 16% experimentally verified.