IC8451 – NOTES & QP
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IC8451 – SYLLABUS
UNIT I SYSTEMS AND REPRESENTATION
Basic elements in control systems: — Open and closed loop systems — Electrical analogy of mechanical and thermal systems — Transfer function — AC and DC servomotors — Block diagram reduction techniques — Signal flow graphs.
UNIT II TIME RESPONSE
Time response: — Time domain specifications — Types of test input — I and II order system response — Error coefficients — Generalized error series — Steady state error — Root locus construction- Effects of P, PI, PID modes of feedback control –Time response analysis.
UNIT III FREQUENCY RESPONSE
Frequency response: — Bode plot — Polar plot — Determination of closed loop response from open loop response — Correlation between frequency domain and time domain specifications
UNIT IV STABILITY AND COMPENSATOR DESIGN
Characteristics equation — Routh Hurwitz criterion — Nyquist stability criterion- Performance criteria — Effect of Lag, lead and lag-lead compensation on frequency response-Design of Lag, lead and laglead compensator using bode plots.
UNIT V STATE VARIABLE ANALYSIS
Concept of state variables — State models for linear and time invariant Systems — Solution of state and output equation in controllable canonical form — Concepts of controllability and observability.