University Course
A complete introduction to feedback systems — from transfer functions and frequency response to state-space methods and modern controller design. Built for engineering students who want rigorous theory paired with hands-on, interactive notebooks.
1 of 8 chapters published
Introduction to Transfer Functions
How we describe linear time-invariant systems in the frequency domain using ratios of polynomials in s.
Poles and Zeros
Understanding how the roots of the numerator and denominator shape system behavior.
Bode Plots
Visualizing magnitude and phase response of a system across frequency.
Nyquist Criterion
Determining closed-loop stability from the open-loop frequency response.
PID Control
Designing proportional-integral-derivative controllers for real-world systems.
State Space Representation
Modeling systems with state variables instead of high-order differential equations.
Controllability and Observability
Determining whether a system can be controlled and whether its state can be inferred.
Root Locus
Tracing how closed-loop pole locations move as controller gain varies.