Course code: wb2400

Course name: Process Control

This concerns a Course 

ECTS credit points: 3

Faculty of Mechanical Engineering and Marine Technology

Section of Systems and Control Engineering

Lecturer(s): dr.Sj.Dijkstra

Tel.:  015 - 27 85606 /      

Catalog data:

Dynamic control, Real process characteristics,

Common control loops, Linear controllers, nonlinear control elements,multiple-loop systems, cascade control, feedforward control, interaction and decoupling, applications.

Course year:

MSc 1^st year

Semester:

2A / 2B

Hours per week:

2

Other hours:

Assessment:

Computer test

Assessment period:

, ,

(see academic calendar)

Prerequisites (course codes):

wb2207

Follow up (course codes):

Detailed description of topics:

Feedback of dynamic systems. Stability and loop gain margin. Deadtime as limiting factor in process control. PI-controller tuning, performance index.

Real process characteristics. Valve characteristics, secondary lags, multicapacity systems.

Common control loops: Flow control, dynamic characteristics, flowmeter characteristics;  Pressure regulation, liquid pressure, gas pressure, vapor pressure; Quality control, dynamics of mixing, quality measurements; Temperature control, multiple interacting lags.

Linear controllers, performance criteria, error magnitude, integratde error, statistical error. PID controllers, tuning for set-point changes.

Model-based controllers, Internal Model Control, Model Predictive Control.

Nonlinear controllers. Amplitude-dependa\ent gain. Limit-cycles. Nonlinear dynamics, deadband, velocity limit, on-off control.

Multiple-loop control. Cascade control, secondary and primary loop. Tuning cascade controllers.

Selective control, adaptive control, self tuning control.

Feedforward control. Ratio control systems. Dynamic compensation. Combining feedback and feedforward.

Interaction and decoupling. Relative-Gain Array method, calculation of RGA.

Effects of interacting loops, negative relative gains. Decoupling, rational decouplers. Linear Multivariable systems.

Energy transfer and conversion systems, mass-transfer operations, batch process control examples.

Course material:

• Copies of the powerpoint sheets are available.
• The examples for the simulations with explanation are available as hard copy and on Blackboard

References from literature:

• Shinskey "Process Control Systems" McGraw-Hill, 4th edition, 1996

Remarks assessment, entry requirements, etc.:

The knowledge of basic control techniques is the starting point for this course

Learning goals:

1. describe the basic rules of tuning feedback controllers in process control and the difficulty to control processes with delays

2. describe the effect of other dynamic elements in a control loop like sensors and actuators

3. analyse common features of real processes

4. describe the working of the most common control loops in process industry

5. select the most suited controller type for different applications : P, PI- and PID controllers and model based controllers

6. describe the use of certain non-linear control elements

7. extend a simple feedback control loop into a multi loop controller scheme like cascade control and combined feedback and feed forward control

8. describe the effect of interaction in systems in which more than one controlled variable

9. analyse in a simple way the amount of interaction in a system and be able to design a decoupling controller

Computer use:

With MATLAB/SIMULINK a wide range of examples from the process industry are studied

Laboratory project(s):

none

Design content:

The design of control structures for processes is studied

Percentage of design:  50%