blockPIDGain

Identify the control gain of a PID controller
Diagram of PIDGainOpen the diagram
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Information

This block calculates the control gain of a PID model as

k = 1/kp + (0.2 + 0.45 T/L),

where kp is the gain of the first-order plus time-delay (FOPTD) model, T is the time constant of the FOPTD model, and L is the time delay of the FOPTD model.

References

Åström, Karl Johan and Tore Hägglund (2004) "Revisiting the Ziegler–Nichols step response method for PID control." Journal of Process Control 14.6 (2004): 635-650.

Connectors

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Interfaces.RealInputkpGain of a first-order plus time-delay (FOPTD) model
Buildings.Controls.OBC.CDL.Interfaces.RealInputTTime constant of the FOPTD model
Buildings.Controls.OBC.CDL.Interfaces.RealInputLTime delay of the FOPTD model
Buildings.Controls.OBC.CDL.Interfaces.RealOutputkControl gain

Revisions

  • June 1, 2022, by Sen Huang:
    First implementation.