Dear colleagues, can you specify, is possible, from personal experience, the (auto)tuning methods or procedures for closed-loop control algorithms, applied to real processes? If your experience includes other algorithms other than the PID, the information is, of course, welcome. Generally each important automation hardware/software company has own self-tuning (PID) procedure, but very, very succinct described. Thank, You!
In my experience, the best way of tuning the PI(D) controller on real processes is this:
This procedure can be automated on a custom microcontroller to achieve auto-tuning.
I think you can find useful reading the paper:
Balestrino, A.; Landi, A.; Medaglia, M.; Satler, M., "Performance Indices and Tuning in Process Control," Control and Automation, 2006. MED '06. 14th Mediterranean Conference on , vol., no., pp.1,6, 28-30 June 2006
Relay feedback auto tuning method proposed by Åström and Hägglund (1984) is an appropriate apporach for tuning the gain of P/PI/PID controller. Its main advantages are its simplicity, robustness and no needs to break the control loop.
1. Relay feeback auto tuning method can excit the dynamic of the considered plant in the closed loop;.
2. Time responses ID method is used for open-loop system only for the dynamic of the plant will be suppressed by feedback.
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