Enhancing energy harvesting in low-frequency rotational motion by a quad-stable energy harvester with time-varying potential wells

Three-dimensional nonlinear extreme vibrations of cantilevers based on a geometrically exact model

“…Beam, plate, and shell structures can be found in various engineering systems [1,2,3,4,5,6,7,8]. As a sub-class of these structures, cantilevers are present in numerous engineering applications ranging from macro [9,10,2] to nano scale, such as micro/nano-electromechanical systems, micro gyroscopes, vibration energy harvesters, and scanning probe microscopy [11,12,13,14,15,16].…”

Multistable vibration energy harvesters: Principle, progress, and perspectives

“…By using the Lagrange equation, the nonlinear magnetic force calculation model and so on, they gave a theoretical model to predict nonlinear dynamic response characteristics and output voltages of the MEH [92]. It was found that bistable/tristable/quad-stable vibration energy harvesters could vibrate in their high-energy interwell orbit and generate large-amplitude output voltage under appropriate rotation conditions [93], as shown in Figure 8(b). During the human walking or running, there is also a circular/rotational motion around the knee.…”

Piezoelectric vibration energy harvester: Operating mode, excitation type and dynamics

“…Zayed et al 145 designed a quad-stable 2-DOF energy harvester that can obtain a superior 7.3 Hz broadband over a bistable energy harvester at an acceleration of 3 m/s 2 . Mei et al 146 designed a quad-stable piezoelectric energy harvester for low-frequency rotational motion. They demonstrated through theoretical studies, numerical calculations and experimental validation that the quad-stable structure could operate over a lower and wider frequency range than the bistable and tri-stable.…”