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.

1. M.Gopal, ‘Digital Control and State variable methods: Conventional and Intelligent control systems’, Tata McGraw Hill, 3rd Ed.,2009.

1. H. K. Khalil, ‘Nonlinear Systems’, Prentice Hall, 3rd Ed., 2002.

2. S.Sastry, ‘Nonlinear Systems: Analysis, Stability and Control’, Springer, 1999.

3. Nijmeijer, Henk, Schaft, Arjan van der, ‘Nonlinear Dynamical Control Systems’, Springer, 1990.

4. Graham, McRuer, Analysis of Nonlinear Control Systems.