## Appendix A  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**System Status** & \(C_{\mathrm{S}}\) **(mm)** & \(K_{\mathrm{a}}\) **(N-m)** & \(\mu_{\mathrm{s}}\) **(Pa-s)** \\ \hline Before optimization & \(8\times 10^{-5}\) & \(3\times 10^{6}\) & 0.02 \\ \hline No fault & \(4\times 10^{-5}\) & \(8\times 10^{6}\) & 0.038 \\ (after optimization) & & & \\ \hline Misalignment faults & \(2\times 10^{-4}\) & \(6\times 10^{5}\) & \(5\times 10^{-3}\) \\ (after optimization) & & & \\ \hline Misalignment-rubbing coupling faults & \(8\times 10^{-5}\) & \(6\times 10^{5}\) & \(5\times 10^{-2}\) \\ (after optimization) & & & \\ \hline \hline \end{tabular}
\end{table}
Table 3: SFD parameters of the rotor system under three conditions.  
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