| Optimization objective | Analysis type | Planted depth/mm | PZT materials | PZT thickness/mm | PZT diameter/mm |
| Open voltage U3/V | k1 | 75.574 | 111.785 | 75.333 | 83.160 |
| k2 | 96.642 | 108.718 | 110.308 | 89.346 | |
| k3 | 102.4512 | 84.893 | 100.883 | 110.052 | |
| k4 | 122.7922 | 92.064 | 110.935 | 114.902 | |
| R | 47.218 | 26.891 | 35.602 | 31.742 | |
| Relative deformation ratio p | k1 | 4.8 | 4.72 | 5.88 | 5.28 |
| k2 | 4.76 | 4.88 | 5.00 | 4.84 | |
| k3 | 4.88 | 4.92 | 4.68 | 4.76 | |
| k4 | 5.04 | 4.96 | 3.92 | 4.60 | |
| R | 0.28 | 0.24 | 1.96 | 0.68 |