Autotuning PID Controllers (PID and Fuzzy Logic)

Often, many PID controllers are poorly tuned. As a result, some controllers are too aggressive and some controllers are too sluggish. Tuning a controller involves adjusting the parameters of the system to get the desired, or optimal, response. However, manually tuning PID controllers can be difficult when you do not know the process dynamics or disturbances. In this case, you can use autotuning to automatically test different parameter values and determine the best response.

Choose from the following VIs that integrate autotuning based on your specific application needs and your knowledge of tuning theory.

Use Case	VI Name
Autotuning that runs with minimal user input or knowledge of tuning algorithms. Single VI implements a controller for a system and allows tuning.	PID Advanced Autotuning VI
Autotuning that runs with minimal user input or knowledge of tuning algorithms. Single VI implements a controller for a system with significant deadtime�and allows tuning. How-To: Programmatically Implementing and Autotuning a PID Controller	PID Autotuning (Temperature) VI
Controlling the autotuning technique used to identify the system. Other PID VIs automatically determine the technique. Tuning system parameters, then passing the output parameters to the PID Advanced VI to implement that controller. How-To: Programmatically Autotuning a Previously Implemented PID Controller	PID Online Autotuning VI
Generating PID parameters for a system given an input/output signal. This technique is useful when you have insufficient information about the system and you want to develop initial parameters based on system response. Provides access to multiple methods for determining PID parameters. Other PID VIs automatically determine the method.	PID Autotuning Design VI
Performing interactive autotuning in a dialog box that you use to configure the process. Not supported on RT or FPGA hardware targets. How-To: Implementing Autotuning with the Autotuning Wizard	PID Autotuning VI
PID applications with high-speed control and/or high channel count on an FPGA target. Implements a fixed-point PID algorithm.	PID (FPGA) VI

Related Information

Updating PID Parameters After Autotuning

Logging Parameter Values After Autotuning

Online Autotuning Techniques

Autotuning Methods for Testing PID Parameters