To find the operating point, use the Linear Analysis Tool. To open the Linear Analysis Tool,
in the Simulink model window, select Analysis > Control Design > Linear Analysis.In the Linear Analysis Tool, on the Linear Analysis tab, in the Operating Point drop-
down list, select Take Simulation Snapshot.In the Enter snapshot times to linearize dialog box, in the Simulation snapshot times
field, enter 0.045, which is enough time for the closed-loop system to reach steady state.7 PID Controller Tuning