Simulink Control Design™ - MathWorks

(Tuis.) #1

Check Analysis Point Placement


Incorrect placement of analysis points, including linearization I/Os and loop openings, can
result in blocks being inappropriately included in or excluded from the linearization result
linearization.

Check Linearization I/O Points Placement


After linearizing the model, check the block linearization values to determine which
blocks are included in the linearization.

Blocks can be missing from the linearization path for different reasons.

Incorrect placement linearization I/O points can result in inappropriately excluded blocks
from linearization. To fix the problem, specify correct linearization I/O points and repeat
the linearization. For more information, see “Specify Portion of Model to Linearize” on
page 2-13.

Blocks that linearize to zero (and other blocks on the same path) are excluded from
linearization. To fix this problem, troubleshoot linearization of individual blocks, as
described in “Block Linearization Troubleshooting” on page 4-62.

Check Loop Opening Placement


Incorrect loop opening placement causes unwanted feedback signals in the linearized
model.

To fix the problem, check the individual block linearization values to identify which blocks
are included in the linearization. If undesired blocks are included, place the loop opening
on a different signal and repeat the linearization.

See Also


More About



  • “Block Linearization Troubleshooting” on page 4-62

  • “Opening Feedback Loops” on page 2-19


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