This is a series of assorted short lectures. The present content focuses on frequency domain analysis for single input systems.
Learn basic metrics to quantify how close a system is to instability.
Learn the connection between Nyquist diagrams and Bode plots.
Learn one major reason why you cannot trust stability margins even though they are still useful.
Learn the concepts of return difference and vector margin to avoid being mislead by classical stability margins.
Learn how to interpret stability margins when there are more than one.
Learn what the loop gain transfer function is, how it is used to determine stability margins, and one common mistake to avoid when forming the loop gain for a given closed loop system.