Autotuning automatically tests different parameter values for a PID controller to determine the best response. A variety of methods exist for testing these parameters. PID and Fuzzy Logic VIs support the following methods for PID autotuning:

  • Ziegler-Nichols
  • Internal Model Control
  • Cohen-Coon
  • Chien-Hrones-Reswick

The Autotuning Wizard and most of the autotuning PID VIs use the Ziegler-Nichols method or, if Ziegler-Nichols is not possible, the Internal Model Control method. Only the PID Autotuning Design VI can implement the Cohen-Coon and Chien-Hrones-Reswick tuning methods.