Simulink Control Design™ - MathWorks

Tips

• To assert that the phase margin is satisfied, select both Include gain and phase
  margins in assertion on page 16-201 and Enable assertion on page 16-215.


• You can add or modify phase margins from the plot window:
  
  
  • To add new phase margin, right-click the plot, and select Bounds > New Bound.
    Select Phase margin in Design requirement type, and specify the margin in
    Phase margin.
  
  
  • To modify the phase margin, drag the segment. Alternatively, right-click the bound,
    and select Bounds > Edit Bound. Specify the new phase margin in Phase
    margin >.
  
  
  
  

You must click Update Block before simulating the model.

Command-Line Information

Parameter: PhaseMargin

Type: character vector

Value: [] | 30 | positive finite value. Must be specified inside single quotes ('').

Default: '[]' for Nichols Plot block, '30' for Check Nichols Characteristics block.

See Also

Plot Linear Characteristics of Simulink Models During Simulation on page 2-82

“Verify Model at Default Simulation Snapshot Time” on page 14-6

Include closed-loop peak gain in assertion

Check that the closed-loop peak gain is less than the value specified in Closed-loop peak

gain (dB) < on page 16-206, during simulation. The software displays a warning if the

closed-loop peak gain is greater than or equal to the specified value.

By default, negative feedback, specified in Feedback sign on page 16-129, is used to

compute the closed-loop peak gain.

This parameter is used for assertion only if Enable assertion on page 16-215 in the

Assertion tab is selected.

16 Blocks — Alphabetical List