Linearize Plant
You can linearize a block or subsystem in your Simulink model without defining separate
analysis points for the block inputs and outputs. The software isolates the selected block
from the rest of the model and computes a linear model of the block from the block inputs
to the block outputs.Linearizing a block in this way is equivalent to specifying open-loop input and open-loop
output analysis points at the block inputs and outputs, respectively. For more information
on specifying analysis points in your model, see “Specify Portion of Model to Linearize” on
page 2-13.Linearize Plant Using Linear Analysis Tool
This example shows how to linearize a plant subsystem in a Simulink model using the
Linear Analysis Tool.Open Simulink model.mdl = 'watertank';
open_system(mdl)For this system, the Water-Tank System block contains all the nonlinear dynamics. To
linearize this system, open the Linear Analysis Tool, and select the block as a linearization
I/O set.To open the Linear Analysis Tool, in the Simulink model window, right-click the Water-
Tank System block, and select Linear Analysis > Linearize Block.2 Linearization