**ES411 - Control systems**

The primary focus is to introduce the basic concepts of control systems, control techniques for design and analysis of real world problems and their simulation and verification using MATLAB/Simulink. This course covers the topics of GATE examination.

The topics covered include :

Introduction to control systems: open loop and closed loop control, components of a basic control loop, Feedback systems, Mathematical models of physical systems.

Block diagram representation of control systems: Transfer function of a system, block diagram reduction technique.

Signal flow graph representation of control systems: obtaining transfer function of a control system.

Transient response analysis: Design specifications, Time response of first, second and higher order systems, Steady state error and error constants.

Stability analysis: concepts of poles and zeros, Routh-Hurwitz criterion, Root Locus technique.

Frequency response analysis: Bode, Polar and Nyquist plots, stability analysis in frequency domain, closed loop frequency response.

Compensators: lead and lag compensators in frequency domain. Proportional (P), Proportional plus Integral (PI), Proportional plus Derivative (PD) and Proportional plus Integral plus Derivative control.

State Variable representation: State model of LTI systems, solution of state equation, state transition matrix, controllability and observability.

Verification of control techniques using MATLAB/Simulink environment.

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