ENCH352

Process Dynamics and Control

Syllabus

Introduction (4 hours)
1. Concept of process dynamics and control
2. Review of Laplace transform methods, Laplace transform of disturbances, and forcing functions
3. Solution of ordinary differential equations, development of transfer functions and their properties
4. Dynamic model building of simple systems
Dynamic Behavior of Open-Loop System (12 hours)
1. Response of first and second order system to various forcing functions (Step, pulse, impulse and ramp)
2. Examples of first and second order systems (Thermocouple, level tank, U-tube manometer)
3. Lumped and distributed parameters
4. Interacting and non-interacting processes
5. Linearization of nonlinear models
6. Inverse response, poles and zeros and their effect
7. Processes with time delay
8. Approximation of higher-order systems
Dynamic Behavior of Closed-Loop System (10 hours)
1. Block diagram representation of process systems, closed loop transfer functions
2. Classification of controllers (On-off, P, PI and PID) and control strategy
3. Response of closed loop feedback control system
4. Servo and regulator problems, offset calculation
5. Stability analysis of closed loop feedback systems: Characteristic equations, Routh-Hurwitz stability criterion, root locus diagram
Frequency Response (7 hours)
1. Frequency domain analysis
2. Control system design by frequency response
3. Gain and phase margin, nyquist stability criterion, bode diagram
4. Methods of tuning of controllers
Process Applications (12 hours)
1. Advanced control strategies: Feed forward, cascade, ratio control, adaptive and inferential control
2. Control valves: Types, operation, sizing, characteristics and positioner
3. Application to equipment such as distillation-columns, reactors
4. Design of control system for complete plants

Practicals

Flow control by manual and pump speed
Direct and indirect control of heater temperature by varying heater power
Pressure controlled by pump speed and solenoid valve
Level control by pump speed and solenoid valve
Feedforward and cascade control
Characterization of flow properties of control valves: linear, equal percentage, and quick opening

Syllabus

Introduction (4 hours)

Concept of process dynamics and control
Review of Laplace transform methods, Laplace transform of disturbances, and forcing functions
Solution of ordinary differential equations, development of transfer functions and their properties
Dynamic model building of simple systems

Dynamic Behavior of Open-Loop System (12 hours)

Response of first and second order system to various forcing functions (Step, pulse, impulse and ramp)
Examples of first and second order systems (Thermocouple, level tank, U-tube manometer)
Lumped and distributed parameters
Interacting and non-interacting processes
Linearization of nonlinear models
Inverse response, poles and zeros and their effect
Processes with time delay
Approximation of higher-order systems

Dynamic Behavior of Closed-Loop System (10 hours)

Block diagram representation of process systems, closed loop transfer functions
Classification of controllers (On-off, P, PI and PID) and control strategy
Response of closed loop feedback control system
Servo and regulator problems, offset calculation
Stability analysis of closed loop feedback systems: Characteristic equations, Routh-Hurwitz stability criterion, root locus diagram

Frequency Response (7 hours)

Frequency domain analysis
Control system design by frequency response
Gain and phase margin, nyquist stability criterion, bode diagram
Methods of tuning of controllers

Process Applications (12 hours)

Advanced control strategies: Feed forward, cascade, ratio control, adaptive and inferential control
Control valves: Types, operation, sizing, characteristics and positioner
Application to equipment such as distillation-columns, reactors
Design of control system for complete plants

Practicals

Flow control by manual and pump speed

Direct and indirect control of heater temperature by varying heater power

Pressure controlled by pump speed and solenoid valve

Level control by pump speed and solenoid valve

Feedforward and cascade control

Characterization of flow properties of control valves: linear, equal percentage, and quick opening