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Feedback Control Architectures

When you open Control System Designer from MATLAB®, you can select one of six possible control architecture configurations.

ConfigurationBlock DiagramFeatures
1

  • Single feedback loop

  • Compensator (C) and plant (G) in forward path

  • Sensor dynamics (H) in feedback path

  • Prefilter F

2

  • Single feedback loop

  • Compensator (C) and sensor dynamics (H) in feedback path

  • Prefilter F

3

  • Compensator (C) and plant (G) in forward path

  • Feedforward prefilter F for input disturbance attenuation

  • Sensor dynamics (H) in feedback path

4

  • Nested multiloop architecture

  • Outer loop with compensator (C1) in forward path

  • Inner loop with compensator (C2) in feedback path

  • Sensor dynamics (H) in feedback path

5

  • Standard Internal Model Control (IMC) architecture

  • Compensator (C) in forward path

  • Plant G1 and plant predictive model G2

  • Disturbance model Gd

  • Prefilter F

6

  • Cascaded multiloop architecture with the inner loop in the forward path of the outer loop.

  • Compensator (C1, C2) in the forward path and sensor dynamics (H1, H2) in the feedback path (both loops)

  • Prefilter F

If your control application does not match one of the supported control architectures, you can use block diagram algebra to convert your system to match an architecture. For an example of such an application, see Design Multiloop Control System.

Note

If you are unable to match your application to one of the supported control architectures, consider using the Control System Tuner app to design your control system.

See Also

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