A Dynamic Model of Arm-Equipped Rotational Energy Harvester During Human Locomotion

A dynamic model of arm-equipped rotational energy harvester (EH) during human walking is proposed. The model describes realistic arm swing based on a two link with shoulder and elbow joints rotation, and includes the electro-mechanical coupling with a rotational electret EH. It is found that output power around 77 µW can be obtained with a rotational electret EH at the walking speed of 1.22 m/s, with minimum outpour power of 40µW. Optimum design of rotational electret EH for human walking can be made with this type of model.