EC304 Automatic Control System
Topic outline
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Basic idea of control systems and their classification, Transfer Function of Electrical, Mechanical systems, Feedback and its effects, Mathematical Models of Physical Systems, Analogous systems, Block Diagram, Signal Flow Graph (SFG) and Mason's Gain Formula.
CO1: Given a system, students shall be able to represent the system in mathematical form, identify type of the system, apply block reduction technique and Mason’s Gain formula to obtain the transfer function of the given system, and formulate differential equation to represent the model of a mechanical system into equivalent electrical system and solve using Laplace transform.-
Feedback unit I
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Time Domain Analysis:
Type and order of the system-Typical Test Signals for the Time response of control system-Unit Step, unit ramp and unit impulse- response of first and second order systems – static and dynamic error coefficients-Basic ideas of Proportional, Derivative, Integral and PID Controllers, Study of electronic controllers.
CO2: For a given system, student shall be able to analyze and evaluate the system in time domain and predict the performance in time domain for different standard input signals. Evaluate the steady-state error.-
Feedback unit 2
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Stability and Frequency Domain Analysis:
Concept of stability, Asymptotic and conditional Stability, Routh Hurwitz criterion, Root locus-Basic Theory and Properties of Root locus – Procedure for construction of Root loci.
Frequency Domain Analysis- Frequency Response – Frequency Domain Specifications, Correlation between Time and Frequency Response, Polar Plot, Bode Plot, Nyquist Stability Criterion, M and N circle.
CO3: For a given system, student shall be able to analyze the system in frequency domain and explain the nature of stability. Examine and analyze the stability by Nyquist criterion and Bode Plot-
Quiz 2
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Feedback unit 3
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Design through Compensation Technique:
Compensation Techniques – Lag compensator – Lead compensator – Lag Lead compensator, Design of Closed Loop Control System using Root Locus and Bode Pot Compensator.
CO4: For a given unstable system, students shall be able to identify and select the suitable compensator. To make the system stable select and design the suitable compensator for implementation. To develop the compensator by using Bode Plot and Root Locus.-
Feedback unit 4
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State Variable Analysis:
Introduction, State Space Representation, State Models of Linear Systems, State Equations, State Transfer Matrices, Controllability and Observability.
Introduction to digital control Systems, Digital/ Discrete Time System, Linear Discrete System, Difference Equation, Role of z transform in discrete time system.
CO5: For a given a system, student shall be able to find the mathematical model called state-space representation and will be able to understand the conversion between transfer function and state-space model. Solve the system to find the time response from state-space representation. Analyze the system and obtained the transfer function from state-space model and vice versa-
Feedback unit 5
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