## 4 Simulation and Result Analysis
### Contribution Rate Analysis
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.009 & 2.004 & 3.010 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.004 & 2.002 & 3.031 \\ Line spectrum amplitude (nT) & 0.1964 & 161.861 & 0.1912 \\ Half-energy bandwidth & 24.4257 & 33.0105 & 5.7716 \\ Centroid frequency (Hz) & 12.7852 & 15.8890 & 3.4438 \\ Standard deviation & 0.1420 & 144.0268 & 0.2461 \\ Skewness factor & 0.0083 & 0.3563 & 0.3150 \\ Kurtosis factor & 1.6274 & 2.4961 & 1.7593 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.004 & 2.002 & 3.031 \\ Line spectrum amplitude (nT) & 0.1964 & 161.861 & 0.1912 \\ Half-energy bandwidth & 24.4257 & 33.0105 & 5.7716 \\ Centroid frequency (Hz) & 12.7852 & 15.8890 & 3.4438 \\ Standard deviation & 0.1420 & 144.0268 & 0.2461 \\ Skewness factor & 0.0083 & 0.3563 & 0.3150 \\ Kurtosis factor & 1.6274 & 2.4961 & 1.7593 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.004 & 2.002 & 3.031 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.009 & 2.004 & 3.010 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.004 & 2.002 & 3.031 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.009 & 2.004 & 3.010 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.004 & 2.002 & 3.031 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.009 & 2.004 & 3.010 \\ Line spectrum amplitude (nT) & 0.0414 & 106.454 & 0.0091 \\ Half-energy bandwidth & 22.4313 & 29.8627 & 6.1274 \\ Centroid frequency (Hz) & 11.7879 & 15.3541 & 3.6701 \\ Standard deviation & 0.0423 & 95.8806 & 0.0098 \\ Skewness factor & 0.1144 & 0.3662 & 0.2455 \\ Kurtosis factor & 1.5950 & 2.5386 & 1.6464 \\ \hline \hline \end{tabular}
\begin{tabular}{c c c} \hline \hline
**Feature Name** & **Shaft Frequency Magnetic Field** & **Wake Magnetic Field** & **Equipment Magnetic Field** \\ \hline Line spectrum frequency (Hz) & 2.004 & 2.002 & 3.031 \\ Line spectrum amplitude (nT) & 0.01964 & 161.861 & 0.1912 \\ Half-energy bandwidth & 24.4257 & 33.0105 & 5.7716 \\ Centroid frequency (Hz) & 12.7852 & 15.8890 & 3.4438 \\ Standard deviation & 0.1420 & 144.0268 & 0.2461 \\ Skewness factor & 0.0083 & 0.3563 & 0.3150 \\ Kurtosis factor & 1.6274 & 2.4961 & 1.7593 \\ \hline \hline \hline \end{tabular}
\end{table}