Simulink Control Design™ - MathWorks

Block Type Linearization Issue Possible Fix

Blocks with

nondouble-precision

signals

Blocks that have nondouble-precision

inputs signals or states and do not have

defined analytic Jacobians linearize to

zero.

Convert the nondouble-

precision data types to

double-precision. For

more information, see

“Linearize Blocks with

Nondouble Precision

Data Type Signals” on

page 2-193.

Blocks that linearize

using numerical

perturbation rather

than defined analytic

Jacobians

Blocks that are located near

discontinuous regions, such as S-

Functions, MATLAB function blocks, or

lookup tables, are sensitive to

numerical perturbation levels. If the

perturbation level is too small, the

block linearizes to zero.

Change the numerical

perturbation level of the

block. For more

information, see

“Change Perturbation

Level of Blocks

Perturbed During

Linearization” on page

2-191.

See Also

More About

• “Linearization Troubleshooting Overview” on page 4-2


• “Identify and Fix Common Linearization Issues” on page 4-9

See Also