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An ultra-low frequency vibration energy harvester with zigzag piezoelectric spring actuated by rolling ball

Energy HarvestingEngineeringVibrationsZigzag Piezoelectric SpringPiezoelectric NanogeneratorsMechanical EngineeringMechatronicsMechanical SystemsActive Vibration ControlNonlinear Vibration ControlPiezoelectricityPiezoelectric MaterialVibration Control