Optimal design of monocrystal piezoelectric generator for different vibration forms

To optimize structure and enhance energy-generation capability of monocrystal piezoelectric generator under specific working environment, a analysis model of energy conversion is established. The piezoelectric generator is optimized for different forms of vibration in two-dimensional. For shock style, Design optimization should improve the stress distribution of piezoelectric transducer under the premise to meet the strength conditions. Taking the wind piezoelectric generator as an example, considering practical application, the weights of related factors which comprise area of piezoelectric membrane, structure volume and energy-generation capability are calculated. The results of two dimensions optimal design for monocrystal piezoelectric generator with cantilever beam structure show that the performance is improved compared with rectangle and trapezoid structure. For forced vibration, design optimization should ensure the natural frequency be consistent with the environment, while minimizing the shape change to adapt to the specific working environment. Compared to the one-dimensional optimization design, two-dimensional structure optimization design can improve the utilization of space effectively.