Bode diagram: Application in the area and the critical point.

[lufer17]

Hello I am having difficulty understanding the Bode Diagram, regarding its practical application in the area and the critical point.

I'll explain in a summarized form what I understood. From this analysis, we can find out if the system is stable, unstable, critical point, using Bode diagram, relation to the gain margin and phase in a system.
Questions regarding practical application in the area:

Example a robotic arm with sensor, when an anomaly occurs in the system because of the signal that is unstable (the operation is out of control), when it is working normally the system is stable. Is the example you said about the robotic arm correct? In practice, I don't know where it is applied.

Doubt regarding the critical point: I don't know what really is about the critical point, I know that when the signals cross we find the critical point, I don't know the consequence and application in the area.

 

[BigBoss]

Gain Margin and Phase Margin both are critical metrics of Feedback Systems whatever the system is.Robotic Arms are surely a kind of Feedbacked devices and the Stability must be carefully examined in term of Gain and Phase Margin.Otherwise the arm moves out of control due to possible Instability.