## 5 Experimental Setup and Verification Analysis
### System Resistance Measurement
In the subsequent step, we tested the system with resistances of 45 K, 50 K, 55 K, 60 K, and 65 K ohms, recording the corresponding voltage and electric power as shown in Table 2. Utilizing this data, we plotted the ohm-volt and ohm-electric power diagrams (Figures 20 and 21). Analysis of Table 2 and Figure 21 reveals that when the attached resistance is 55 K, the system achieves its highest output power at 0.161765483 mW. Figure 19: Ohms-power diagram with 1 g.  
Figure 18: Ohms-volts diagram with 1 g.  
Continuing the experiments, we added a 5-g mass to the end of the lever element slapping the piezoelectric patch, measuring the open-circuit voltage of the system. After five experiments, the average voltage was found to be 5.783 volts. Five additional experiments yielded an average voltage of 2.064 volts, using a 30 K-ohm resistance as the load resistance in the system. By substituting the average voltage into Equation (43), the theoretical internal resistance of the system was calculated to be approximately 54,043 ohms (rounded to 54 K ohms). We then tested the system with resistances of 44 K, 49 K, 54 K, 59 K, and 64 K ohms, recording the corresponding voltage and electric power as shown in Table 3. Using this data, we plotted the ohm-volt and ohm-electric power diagrams (Figures 22 and 23). Analysis of Table 3 and Figure 23 reveals that when the attached resistance is 54 K, the system achieves its highest output power at 0.179359314 mW. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \(\mathbf{\Omega}\) & \(\mathbf{1}\) & \(\mathbf{2}\) & \(\mathbf{3}\) & \(\mathbf{4}\) & \(\mathbf{5}\) & **Average (V)** & **mW** \\ \hline
0 & 6.067 & 6.059 & 5.989 & 5.977 & 6.042 & 6.027 & \\ \hline
30,000 & 2.047 & 2.104 & 2.255 & 2.236 & 2.020 & 2.132 & 0.1515 \\ \hline
45,000 & 2.795 & 2.757 & 2.821 & 2.756 & 2.803 & 2.787 & 0.1553 \\ \hline
50,000 & 2.940 & 2.944 & 2.947 & 2.963 & 2.860 & 2.931 & 0.1562 \\ \hline
55,000 & 3.114 & 3.106 & 3.127 & 3.125 & 3.105 & 3.115 & 0.1618 \\ \hline
60,000 & 3.186 & 3.153 & 3.196 & 3.215 & 3.191 & 3.188 & 0.1564 \\ \hline
65,000 & 3.309 & 3.279 & 3.322 & 3.279 & 3.272 & 3.292 & 0.1548 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Corresponding voltage and power for different resistances of 3 g mass added to the lever end. Figure 20: Ohms-volts diagram with 3 g.  
Finally, we introduced a 7-g mass block to the end of the lever and carried out five trials. The average measured voltage in these experiments was 5.737 volts. The theoretical value of the internal resistance of the system was calculated to be 54,550 ohms (rounded to 55 K ohms). Employing load resistances of 30 K, 45 K, 50 K, 55 K, 60 K, and 65 K ohms, we calculated the corresponding voltage and electric power as presented in Table 4. Figures 24 and 25 depict their respective ohm-volt and ohm-electric power diagrams. It is evident from Table 4 and Figure 25 that when the load resistance is 55 K, the system attains its highest output electric power at 0.167406107 mW. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{\(\mathbf{\Omega}\)} & \multicolumn{6}{c}{**Voltage (V)**} & \multirow{2}{*}{**Average (V)**} \\  & **1** & **2** & **3** & **4** & **5** & **Average (V)** \\ \hline
0 & 5.884 & 5.657 & 5.669 & 6.004 & 5.701 & 5.783 \\ \hline
30,000 & 2.007 & 1.994 & 1.989 & 2.112 & 2.218 & 2.064 & 0.1420 \\ \hline
44,000 & 2.755 & 2.655 & 2.662 & 2.614 & 2.817 & 2.700 & 0.1657 \\ \hline
49,000 & 2.929 & 2.894 & 2.959 & 2.862 & 2.947 & 2.918 & 0.1738 \\ \hline
54,000 & 3.174 & 3.011 & 3.269 & 3.098 & 3.008 & 3.112 & 0.1794 \\ \hline
59,000 & 3.128 & 3.106 & 3.303 & 3.324 & 3.315 & 3.235 & 0.1774 \\ \hline
64,000 & 3.116 & 3.488 & 3.420 & 3.283 & 3.399 & 3.341 & 0.1744 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Corresponding voltage and power for different resistances of 5 g mass added to the lever end.