Specifications

Linearize Simulink Models
2-29
The step response from feed concentration to output CSTR/2 displays an interesting
inverse response. An examination of the linear model shows that CSTR/2 is the residual
CSTR concentration, C_A. When the feed concentration increases, C_A increases initially
because more reactant is entering, which increases the reaction rate. This rate increase
results in a higher reactor temperature (output CSTR/1), which further increases the
reaction rate and C_A decreases dramatically.
Export Linearization Result
If necessary, you can repeat any of these steps to improve your model performance.
Once you are satisfied with your linearization result, drag and drop it from the Linear
Analysis Workspace to the MATLAB Workspace in the Linear Analysis Tool. You can
now use your linear model to design an MPC controller.
Related Examples
• “Design Controller Using the Design Tool”