Simulink Control Design™ - MathWorks

(Tuis.) #1

Signal Selection


Use this section of the dialog box to specify noise input locations and performance output
locations. Also specify any locations at which to open loops for evaluating the tuning goal.



  • Specify noise inputs (w)


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 LQG cost
for a noise input 'u' and performance output 'y', click Add signal to list and
select 'u'. To constrain the LQG cost for a MIMO response, select multiple signals or
a vector-valued signal.


  • Specify performance outputs (z)


Select one or more signal locations in your model as performance outputs. To
constrain a SISO response, select a single-valued output signal. For example, to
constrain the LQG cost for a noise input 'u' and performance output 'y', click
Add signal to list and select 'y'. To constrain the LQG cost for a MIMO response,
select multiple signals or a vector-valued signal.


  • Evaluate LQG objective 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.


LQG Objective


Use this section of the dialog box to specify the noise covariance and performance
weights for the LQG goal.


LQR/LQG Goal
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