Notice how the actual response, or the measured response, is differentfrom the simulated response in the simulation graph. The SI ModelSimulation VI simulates the response of the system without considering theactual response of and the noise dynamics in the system.The block diagram in Figure 9-17 shows how you can use the SI ModelResidual Analysis VI with the ARX model identified in the User-DefinedCriterion section to analyze the residuals.