A frequency response model matching method for PID controller design for processes with dead-time.

Area of Science:

• Control Systems Engineering
• Process Control

Background:

• Integrating processes are common in industrial applications but challenging to control.
• Traditional PID controller tuning methods can be complex for these systems.

Purpose of the Study:

• To develop a new PID controller design method for integrating processes.
• To utilize frequency response matching for accurate parameter tuning.
• To offer two distinct approaches for controller design.

Main Methods:

• A double feedback loop configuration with stabilizing inner loop and outer loop PID tuning via frequency response matching.
• A direct design approach considering a load-disturbance rejection model.
• Utilizing two low-frequency points for matching, leading to linear algebraic equations for parameter calculation.

Main Results:

• The proposed methods provide a systematic way to obtain PID controller parameters.
• Effectiveness demonstrated through several examples from existing literature.
• Comparison with well-established design methods shows competitive performance.

Conclusions:

• The frequency response matching method offers an effective and straightforward approach for PID controller design in integrating processes.
• Both proposed design strategies yield accurate controller parameters.
• The method is validated against existing techniques, confirming its utility.