Specifications

3 Designing Controllers Using the Design Tool GUI
3-38
CSTR Disturbance 1 Scenario
Copy Disturbance 1. Rename the copy Disturbance 2, and set its Controller option to
OutputSteps.
If necessary, close any open simulation plot windows. Simulate both scenarios. CSTR
Outputs for Disturbance Scenarios 1 and 2 and CSTR Inputs for Disturbance Scenarios 1
and 2 show the results.
CSTR Outputs for Disturbance Scenarios 1 and 2 shows that default controller (case 1)
returns to the setpoint in less than one third the time required by the modified controller
(case 2). Its maximum deviation from the setpoint is also 10% smaller. CSTR Inputs for
Disturbance Scenarios 1 and 2 shows that in both cases the input moves are smooth and
of reasonable magnitude. (It also shows the input disturbance.)