Introduction (05 Periods)
Concept of automatic control, Advantages of automatic control, manual and automatic
control, physical and block diagrams.
2. Elements of control System (10 Periods)




Definition- input means, controlling means, actuating means, measuring means, final
control elements.
3. Process Characteristics (15 Periods)
Process variables, process degree of freedom, forcing function, step function, ramp,
impulse, sinusoidal function and Laplace transformation.
4. Elements of process dynamics (22 Periods)
Time constant and oscillatory element, determination of system function or transfer
function of the following- sketch physical diagram and block diagram
4.1 I
st order system or time constant element- Naked bulb thermometer, Stirred tank
heater, Mixing process, R.C. Circuit, Liquid levels, Two time constant type liquid
vessel cascaded i.e. non interacting and non-cascaded, i.e. interacting.
4.2 IInd order system or oscillatory type element- Bulb in themowell, Mechanical
damper.
Response of Ist order system to step, ramp, impulse and sinusoidal inputs. Response of IInd
order system to step change (transient response).
5. Controller Characteristic or Modes of Control Action (15 Periods)
Block diagram of a control system, negative and positive feedback system, servo and
regulatory problem, control valve mechanism and its transfer function, elements of
controller, proportional control, integral control, proportional-integral control,
proportional derivative control proportional-integral-derivative control, two positions
control.
6. Closed Loop in Automation Control (14 Periods)
Standard block diagram symbol, overall transfer function for a single loop system,
overall transfer function for change in set point and for change in load, overall transfer
function in multi loop control system, unit step response of the following:
6.1 Proportional control at stirred tank heater for set point change and for load
change.
6.2 Proportional integral control of stirred tank heater for set point change and load
change
7. Introduction to Programmable Logic Controller (PLC) and Distributed Control System
(DCS) (03 Periods)