This course is directed to anyone who would like to gain a better understanding of how to tune control loops-whether they have tuned loops but would like to become more proficient or they have never tuned a loop before.
At the end of the course, the participants will be able to;
- Define the concepts of PID control.
- Explain the operation of the components in a closed loop control system including static and dynamic functions.
- Identify the requirements for open loop and closed loop stability.
- Use three methods to tune a control system for stated quality control.
- Apply the functions of cascade control loops and the advantage of cascade control over single element feedback control.
- Tune a cascade control loop for optimum control.
- Apply the principles and design features of feedforward control.
- Tune a feedforward control system for optimum control.
- Identify the advantages of feedforward control over feedback control.
- Apply the operation and function of ratio control systems.
- Tune ratio control systems.
- Review of Feedback Control Concepts and Components: History of Control Operation | Concepts | Pictorial Representation | Disturbances in the Loop.
- Control Modes: Proportional | Integral | Derivative.
- Dynamic and Steady State Considerations: Gain | Dead Time | Time Constant.
- Tuning Control Systems: Closed Loop Tuning Using Ziegler Nichols Method | Evaluation and Control Criteria.
- Cascade Control: Primary Loop | Secondary Loop | Design and Tuning Criteria.
- Ratio Control: Applications | Implementation.
- Feedforward Control: Criteria | Applications | Tuning | Implementation | Material and Energy Balances.
- Safety Concerns and Procedures when Operating Control Systems.
Classroom/Laboratory Exercises:
- Demonstrate the operation of components required for closed loop control.
- Review start-up procedures for single- and multi-loop systems.
- Tune feedback control loops via a number of different methods.
- Tune cascade, ratio, and feedforward control systems.
- Tune using PC-based simulation software.
- Observe operation and tuning of a feedback control loop.
- Tune cascade, ratio, and feedforward control systems using PC-Based simulation software.
A hand-held calculator should be brought to class.
- Registrants are expected to have a basic understanding of instrumentation and controls (either by working experience or taking fundamental courses such as ISA's FG07: Introduction to Industrial Automation and Control) as this course does not cover that material.
3 Days
