The generalized forced oscillation method for tuning PID controllers

Area of Science:

• Control Engineering
• Automation Systems
• Process Control

Background:

• Proportional-Integral-Derivative (PID) controllers are fundamental in industrial automation.
• Existing tuning methods, like Ziegler-Nichols, have limitations in plant applicability.
• A need exists for generalized PID controller tuning applicable to diverse systems.

Purpose of the Study:

• To propose a generalized tuning methodology for PID controllers.
• To extend the practical appeal of established methods to more complex systems.
• To enable automated application of the proposed tuning technique.

Main Methods:

• A novel relay feedback experiment utilizing a relay with adjustable phase (RAP) is employed.
• The tuning methodology relies on formulas derived from measurements obtained during the RAP experiment.
• The approach is validated using experimental results from a liquid processing plant.

Main Results:

• The proposed generalized tuning methodology demonstrates effective PID controller tuning.
• The RAP-based experiment allows application to a wider range of industrial plants.
• Experimental validation confirms the methodology's performance and practical feasibility.

Conclusions:

• The generalized PID tuning methodology offers a practical and broadly applicable solution.
• The RAP-based relay feedback experiment facilitates robust and automatable controller tuning.
• This approach enhances the performance and applicability of PID control in industrial settings.