Simulink Control Design™ - MathWorks

If your hardware has low memory on board, use this option when tuning in external mode.

With this option, Simulink only generates code for the online frequency response

estimation functionality. Because no code is deployed for the PID design functionality, the

result is reduced memory usage on the hardware. In this case, after the estimation is

done, the PID gains are computed in Simulink on the host computer and then sent back to

the autotuner block.

The PID gain calculation at the end of the tuning process demands much more

computation load than online frequency response estimation. If the controller sample time

is very fast, some hardware might not be able to finish the calculation within an execution

cycle. Therefore, having the host computer to perform the PID gain calculation also

enables you to tune a PID controller with fast sample time on hardware with limited

computing power.

bdclose(mdl)

See Also

Open-Loop PID Autotuner

More About

• “How PID Autotuning Works” on page 8-6


• “PID Autotuning for a Plant Modeled in Simulink” on page 8-9


• “Tune PID Controller in Real Time Using Closed-Loop PID Autotuner Block” on page
  8-39

8 PID Autotuning