Simulink Control Design™ - MathWorks

• Specify stochastic inputs

Select one or more signal locations in your model as noise inputs. To constrain a SISO

response, select a single-valued input signal. For example, to constrain the gain from a

location named 'u' to a location named 'y', click Add signal to list and select

'u'. To constrain the noise amplification of a MIMO response, select multiple signals

or a vector-valued signal.

• Specify stochastic outputs

Select one or more signal locations in your model as outputs for computing response

to the noise inputs. To constrain a SISO response, select a single-valued output signal.

For example, to constrain the gain from a location named 'u' to a location named

'y', click Add signal to list and select 'y'. To constrain the noise amplification

of a MIMO response, select multiple signals or a vector-valued signal.

• Compute output variance with the following loops open

Select one or more signal locations in your model at which to open a feedback loop for

the purpose of evaluating this tuning goal. The tuning goal is evaluated against the

open-loop configuration created by opening feedback loops at the locations you

identify. For example, to evaluate the tuning goal with an opening at a location named

'x', click Add signal to list and select 'x'.

TipTo highlight any selected signal in the Simulink model, click. To remove a signal

from the input or output list, click. When you have selected multiple signals, you can

reorder them using and. For more information on how to specify signal locations

for a tuning goal, see “Specify Goals for Interactive Tuning” on page 10-39.

Weights

Use the Left weight WL and Right weight WR text boxes to specify the frequency-

weighting functions for the tuning goal.

WL provides the weighting for the output channels of H(s), and WR provides the

weighting for the input channels.

10 Control System Tuning