# EC6405 Control System Engineering Previous Year Question Papers

EC6405 Control System Engineering Previous Year Question Papers

B.E – Electronics and Communication Engineering, Second Year 4th Semester EC6405 Control System Engineering Previous Year Question Papers For The Regulation 2013.

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OBJECTIVES:
• To introduce the elements of a control system and their modeling using various Techniques.
• To introduce methods for analyzing the time response, the frequency response and the stability of systems
• To introduce the state variable analysis method
UNIT I – CONTROL SYSTEM MODELING
Basic Elements of Control System – Open loop and Closed loop systems – Differential equation – Transfer function, Modeling of Electric systems, Translational and rotational mechanical systems – Block diagram reduction Techniques – Signal flow graph.
UNIT II – TIME RESPONSE ANALYSIS
Time response analysis – First Order Systems – Impulse and Step Response analysis of second order systems – Steady state errors – P, PI, PD and PID Compensation, Analysis using MATLAB.
UNIT III – FREQUENCY RESPONSE ANALYSIS
Frequency Response – Bode Plot, Polar Plot, Nyquist Plot – Frequency Domain specifications from the plots – Constant M and N Circles – Nichol‟s Chart – Use of Nichol‟s Chart in Control System Analysis. Series, Parallel, series-parallel Compensators – Lead, Lag, and Lead-Lag Compensators, Analysis using MATLAB.
UNIT IV – STABILITY ANALYSIS
Stability, Routh-Hurwitz Criterion, Root Locus Technique, Construction of Root Locus, Stability, Dominant Poles, Application of Root Locus Diagram – Nyquist Stability Criterion – Relative Stability, Analysis using MATLAB.
UNIT V – STATE VARIABLE ANALYSIS
State space representation of Continuous Time systems – State equations – Transfer function from State Variable Representation – Solutions of the state equations – Concepts of Controllability and Observability – State space representation for Discrete-time systems. Sampled Data control systems – Sampling Theorem – Sampler & Hold – Open loop & Closed loop sampled data systems.