Syllabus

Digital control systems – sample and hold systems ‐ Jury stability criterion – Implementation of digital controllers – tunable PID controllers – Digital compensator design using root locus and frequency response methods.

Linear versus nonlinear systems ‐ Describing function analysis ‐ common nonlinearities ‐ Analysis of non‐linear systems using phase plane technique ‐ condition for stability ‐ Stability in the sense of Lyapunov and absolute stability ‐ Popov's stability criterion ‐ Lure’s Transformation. Nonlinear control system design problem ‐ Concept of variable ‐ structure controller and sliding control.