Magnetic Coupling Analysis of a Two-DOF Piezoelectric Cantilever Beam

Two-DOF cantilever beams have gradually demonstrated the advantage of high output power in the field of piezoelectric vibration energy harvesting, enabling multi-directional and self-adaptive energy harvesting. Introducing the magnetic coupling effect into a two-DOF cantilever beam can further expand the energy output characteristics of the cantilever beam. This article derives the expression formula of three-dimensional magnetic force, studies the effect of magnetic coupling on the vibration response of a two-DOF cantilever beam, and simulates the changes in the total potential energy and magnetic force of the system with the position and vibration displacement of the cantilever beam. This study can further expand the application scenarios of two-DOF cantilever beams.