EE-304-E CONTROL SYSTEM ENGINEERING
EE-304-E CONTROL SYSTEM ENGINEERING
CLASS WORK : 50
EXAM : 100
UNIT1. INTRODUCTORY CONCEPTS :
System/Plant model, types of models, illustrative examples of plants and their inputs and outputs, controller, servomechanism, regulating system, linear time-invariant (LTI) system, time-varying system, causal system, open loop control system, closed loop control system, illustrative examples of open-loop and feedback control systems, continuous time and sampled data control systems. Effects of feedback on sensitivity (to parameter variations), stability, external disturbance (noise), overall gain etc. Introductory remarks about non-linear control systems.
UNIT2. MATHEMATICAL MODELLING :
Concept of transfer function, relationship between transfer function and impulse response, order of a system, block diagram algebra, signal flow graphs : Mason’s gain formula & its application, characteristic equation, derivation of transfer functions of electrical and electromechanical systems. Transfer functions of cascaded and non-loading cascaded elements. Introduction to state variable analysis and design.
UNIT3. TIME DOMAIN ANALYSIS :
Typical test signals, time response of first order systems to various standard inputs, time response of 2nd order system to step input, relationship between location of roots of characteristics equation, w and wn, time domain specifications of a general and an under-damped 2nd order system, steady state error and error constants, dominant closed loop poles, concept of stability, pole zero configuration and stability, necessary and sufficient conditions for stability, Hurwitz stability criterion, Routh stability criterion and relative stability.
UNIT4. ROOT LOCUS TECHNIQUE :
Root locus concept, development of root loci for various systems, stability considerations.
UNIT5. FREQUENCY DOMAIN ANALYSIS :
Relationship between frequency response and time-response for 2nd order system, polar, Nyquist, Bode plots, stability, Gain-margin and Phase Margin, relative stability, frequency response specifications.
UNIT6. COMPENSATION :
Necessity of compensation, compensation networks, application of lag and lead compensation, basic modes of feedback control, proportional, integral and derivative controllers, illustrative examples.
UNIT7. CONTROL COMPONENTS :
Synchros, AC and DC techo-generators, servomotors, stepper motors, & their applications, magnetic amplifier.
TEXT BOOK :
1. Control System Engineering : I.J.Nagrath & M.Gopal; New Age
REFERENCE BOOKS :
1. Automatic Control Systems : B.C.Kuo, PHI.
2. Modern Control Engg : K.Ogata; PHI.
3. Control Systems – Principles & Design : Madan Gopal; Tata Mc Graw Hill.
4. Modern Control Engineering.R.C.Dorl & Bishop; Addison-Wesley
NOTE: Eight questions are to be set – at least one from each unit. Students have to attempt five questions.
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