Choosing a Compensator Design Approach

Simulink Control Design provides two tools to tune Simulink blocks, such as Transfer function and PID Controller blocks:

• PID Tuner

• SISO Design Tool

Use the following table to determine which tool supports what you want to do.

	PID Tuner	SISO Design Tool
Supported Blocks	PID Controller PID Controller 2DOF	Linear blocks
Loop Structure	Single-loop control systems	Single- or multi-loop control systems
Control Design Approach	Simple automatic PID gain tuning by specifying system response time and stability margins	Graphically tune poles and zeros on design plots, such as Bode, root locus, and Nichols Use a PID, LQG, IMC, Robust Control Loop Shaping, and Simulink Design Optimization automated tuning method
Analysis of Control System Performance	Step response for reference tracking and disturbance rejection Open-loop Bode and Nichols charts	Any combination of responses for any input reference or disturbance in your Simulink model using SISO Tool LTIViewer

If you have a nonlinear plant, the software automatically linearizes your model before tuning the controller blocks.

Designing Compensators

Automatic PID Tuning

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