blockPIIntegralTime

Identify the integral time of a PI controller
Diagram of PIIntegralTimeOpen the diagram
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Information

This block calculates the integral time of a PI model as

Ti = 0.35 L + 13 L T2/(T2 + 12 L T + 7 L2),

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

References

Garpinger, Olof, Tore Hägglund, and Karl Johan Åström (2014) "Performance and robustness trade-offs in PID control." Journal of Process Control 24.5 (2014): 568-577.

Connectors

TypeNameDefaultDescription
Buildings.Controls.OBC.CDL.Interfaces.RealInputTTime constant of a first-order plus time-delay (FOPTD) model
Buildings.Controls.OBC.CDL.Interfaces.RealInputLTime delay of the FOPTD model
Buildings.Controls.OBC.CDL.Interfaces.RealOutputTiTime constant for the integral term

Revisions

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