Simulink Control Design™ - MathWorks

Block Type Linearization Issue Possible Fix

Blocks with

discontinuities

Blocks with discontinuities typically

have poor linearization results when

the operating point is near the

discontinuity.

• Treat the block as a
  gain of 1 during
  linearization. To do
  so, select the Treat
  as gain when
  linearizing block
  parameter.


• Specify a custom
  block linearization.
  For examples, see
  “Specify Linear
  System for Block
  Linearization Using
  MATLAB Expression”
  on page 2-162 and
  “Specify D-Matrix
  System for Block
  Linearization Using
  Function” on page 2-
  163.
  Event-Based
  Subsystems
  (triggered
  subsystems)

Blocks within event-based subsystems

linearize to zero because such

subsystems do not trigger during

linearization.

When possible, specify a

custom event-based

subsystem linearization

as a lumped average

model or periodic

function call subsystem.

For more information,

see “Linearize Event-

Based Subsystems

(Externally Scheduled

Subsystems)” on page 2-

195.

4 Troubleshooting Linearization Results