Specifications

3 Designing Controllers Using the Design Tool GUI

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It is good practice to specify the prediction and control horizons such that

P M t t

d max

- D?

Here, P is the prediction horizon, M is the control horizon, t

d,max

is the maximum delay,

and Δt is the control interval. In the Control interval (time units) box, which specifies

Δt, enter 1. Then, because the maximum ioDelay for the DC model is 8.1 minutes, t

d,max

Δt is 8.1. You can satisfy the inequality by setting P = 30 and M = 5. In the Prediction

horizon (intervals) box, enter 30, and in the Control horizon (intervals) box, enter

Now that you have specified the controller horizons, simulate the model to test the

controller performance. In the tree, select Scenarios > Scenario1.