Course PEF3006 Process Control Fall 2018 Cascade control

Slides:

Advertisements

Similar presentations

Air and Water Chiller Basic Class

Advertisements

5387 Avion Park Drive Highland Heights, Ohio INTUNE v4.4 Demonstration.

Part IV ：Enhancements to Single-Loop PID Feedback Control

Controller Design, Tuning. Must be stable. Provide good disturbance rejection---minimizing the effects of disturbance. Have good set-point tracking---Rapid,

1 ChE / MET Apr 12 Process Linearity, Integral Windup, PID Controllers Linearity, Windup, & PID.

CHE 185 – PROCESS CONTROL AND DYNAMICS

Contents of the presentation:

Introduction to Industrial Control Systems

Cascade, Ratio, and Feedforward Control

Chapter 6 Control Using Wireless Throttling Valves.

Cascade and Ratio Control

26 Nov 12 Process Linearity, Integral Windup,

Topic 5 Enhanced Regulatory Control Strategies. In the previous lecture…  Plant test  Interacting loops.

Topic 4 Controller Actions And Tuning. Chemical Processes Self-regulating Process Dynamics SS Gain, Kp Deadtime, θ Lag, τ Integrating Process Dynamics.

1 ChE / MET Apr 12 Cascade Control: Ch 09 Ratio Control: Ch 10 Advanced control schemes.

CSE 425: Industrial Process Control 1. About the course Lect.TuTotal Semester work 80Final 125Total Grading Scheme Course webpage:

Inferential Control Control Using a Single Secondary Measurement.

Feedforward Control ( 前馈控制 ) Dai Lian-Kui Shen Guo-jiang Institute of Industrial Control, Zhejiang University.

Cascade Control Systems (串级控制系统)

Feedforward Control ( 前馈控制 ) Liankui DAI Institute of Industrial Control, Zhejiang University, Hangzhou, P. R. China 2009/04/22.

Control Systems Design Slovak University of Technology Faculty of Material Science and Technology in Trnava 2007.

4 Starting Tips to Keep Your Car in Top Condition

Dynamics Seminar Section 3 Process Control

Automatic control systems III

Instrumentation Process Control

Presentation at NI Day April 2010 Lillestrøm, Norway

Feedback Control System

Mathematical Models for Simulation, Control and Testing

PEF3006 Process Control Fall 2017 Sensors By Finn Haugen

Introduction to process control

Course PEF3006 Process Control Fall 2017 Lecture: Process dynamics

Course PEF3006 Process Control Fall 2017 Actuators By Finn Haugen

Course IIA1117 Control Engineering Fall 2017 Plant-wide control

State estimation (Kalman filter)

Feedforward Control (前馈控制)

Model-based Predictive Control (MPC)

Tuning of PID controllers

Start program Start Start Time Duration Counter.

Quicken capital one download error

Av Finn Aakre Haugen IA3112 Automatiseringsteknikk og EK3114 Automatisering og vannkraftregulering Høstsemesteret 2017 Gain scheduling.

Course PEF3006 Process Control Fall 2018 Feedforward Control

Tuning of PID controllers

PID controller: Reverse or direct action?

Process Control Engineering

Model-based Predictive Control (MPC)

Course PEF3006 Process Control Fall 2018 Lecture: Process dynamics

Course PEF3006 Process Control Fall 2018 PID Control

Course PEF3006 Process Control Fall 2017 Controllers By Finn Haugen

State estimation (Kalman filter)

Introduction to process control

IA3112 Automatiseringsteknikk Høsten 2018

Course IIA1117 Control Engineering Fall 2017 Cascade control

Averaging (or equalizing) level control

Course IIA1117 Control Engineering Fall 2018 Cascade control

Course IIA1117 Control Engineering Fall 2018 Plant-wide control

Av Finn Aakre Haugen IA3112 Automatiseringsteknikk og EK3114 Automatisering og vannkraftregulering Høstsemesteret 2018 Gain scheduling.

Course PEF3006 Process Control Fall 2017 Cascade control

Course PEF3006 Process Control Fall 2017 Feedforward Control

How a control system may become unstable

Averaging (or equalizing) level control

Course IIA1117 Control Engineering Fall 2018 Ratio control

Course IIA1117 Control Engineering Fall 2017 Ratio control

On-Off Control (alternative to PID)

Averaging (or equalizing) level control

On-Off Control (alternative to PID)

How a control system may become unstable

Performance and Robustness of the Smith Predictor Controller

PID controller: Reverse or direct action?

Course PEF3006 Process Control Fall 2017 PID Control

Some critical questions

Presentation transcript:

By Finn Aakre Haugen (finn.haugen@usn.no) Course PEF3006 Process Control Fall 2018 Cascade control By Finn Aakre Haugen (finn.haugen@usn.no) USN. PEF3006 Process Control. Haugen. 2018

Faster (more effective) compensation of process disturbances. Benefit of cascade control (comparing with ordinary single loop control): Faster (more effective) compensation of process disturbances. USN. PEF3006 Process Control. Haugen. 2018

Review: Single-loop control system 3 Review: Single-loop control system USN. PEF3006 Process Control. Haugen. 2018

Cascade control system 4 Improved structure with faster (more effective) disturbance compensation: Cascade control system USN. PEF3006 Process Control. Haugen. 2018

Interpretation: With cascade control, the original actuator is substituted by a "new" well-behaving" actuator: USN. PEF3006 Process Control. Haugen. 2018

USN. PEF3006 Process Control. Haugen. 2018 Controller tuning: First, tune the secondary controller (with the primary controller in Manual mode). Then, tune the primary controller (with the secondary controller in Auto mode). USN. PEF3006 Process Control. Haugen. 2018

Example 1: Cascade control of temperature in a vessel 7 Simulator (unzip all the files, and then run the exefile). USN. PEF3006 Process Control. Haugen. 2018

Which of the control structures is the best? Example 1 cont.: Comparing performance indexes IAE (Integral of Absolute value of control Error): Excitation Single-loop Cascade Their ratio (Sprang = step) (Forstyrrelse = disturbance) Which of the control structures is the best? USN. PEF3006 Process Control. Haugen. 2018

Example 2: Cascade control of heat exchanger Simulator USN. PEF3006 Process Control. Haugen. 2018