CO2: Derive the response of systems for various types input disturbances
CO3: Knowledge of feedback control with servo and regulatory action
CO4: Analyze open, closed loop responses and stability of systems
CO5: Design control systems of P/ PI /PID type and their tuning
Course Content
Module 1: (12 hours)
General principles of process control, basic control elements, degree of freedom and fixing of control parameters, simple system analysis, Laplace transformation and transfer functions, block diagrams, linearization, effect of poles, zeros and time delays on system response, response of first order systems, transfer function, transient response, step response, impulse response, sinusoidal response, physical examples of first order systems, liquid level, mixing process, linearization, response of first order systems in series, non-interacting systems, interacting systems, higher order systems, second order and transportation lag, under damped systems, step response, impulse response, sinusoidal response.
Module 2: (14 hours)
The control system, block diagram, servo problem and regulator problem, negative feed-back and positive feedback controllers and final control elements, ideal transfer functions, proportional, proportional integral and proportional integral derivative controllers, on-off controllers, supervisory control and data acquisition (SCADA),distributed control system (DCS), Stability, root locus, frequency response using Bode and Nyquist plots
Module 3: (13 hours)
control system design by frequency response, Bode stability criterion, gain and phase margins, Z-N controller settings, advanced control strategies, cascade control, feed forward control, ratio control, Smith predictor, internal model control, Control tuning and process identification, tuning rules (Ziegler-Nichol Rules and Cohen-Coon rules), process identification, step testing, semi-log plots for modeling control valves, control valve construction, valve sizing, valve characteristics, effective valve characteristics
Reference:
1. D.R. Coughanowr, S. E. LeBlanc, Process System Analysis and Control, 3rd Ed., McGraw Hill, 2017.
2. D.E. Seborg, T.F. Edgar and D.A. Mellichamp, Process Dynamics and Control, 2nd Ed., John Wiley and Sons, 2004.
3. B.W. Bequette, Process Control: Modeling, Design and Simulation, Prentice Hall, New Delhi, 2003.
4. W.L. Luyben, Process Modeling Simulation and Control for Chemical Engineers, 2nd Ed., McGraw Hill,1990