Hello Muhammad,
I understand that you are trying to plot the frequency response of open loop and closed loop systems and trying to visualize the hysteresis effect in Simulink.
The open loop and closed loop frequency responses can be obtained by using the “Frequency Response Estimator” block in Simulink. This block can Estimate plant frequency responses during simulation or in real time and can be used for getting the bode plots. For getting the open loop response make the corresponding open loop system and make the appropriate connections from the system directly to “Frequency Response Estimator” block and observe the frequency response. For the closed loop frequency response design a feedback control system and then connect the input of the system to the “Frequency Response Estimator” block. There is no direct way of getting open loop and closed loop frequency responses. Separate control systems of each type must be made and then connected to this block to get the respective frequency responses.
For the second part to observe the effect of hysteresis you require a plot of variation of the displacement signal with time. Simulink provides multiple methods to observe variation of signals with time. A scope block can be connected to displacement signal and the reference signal in the model to compare both the signal’s variation with time. Other options are to use the simulation data inspector, logging the signals and exporting to workspace and then plotting them.
You can refer to the following documentation for more information:
