MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Specifiche Scaricare il pdf (Pagina 72)

3 Designing Controllers Using the Design Tool GUI

3-22

Normalizing Response Amplitudes

When you're using the Channel Grouping: All option, you might find that the variables

have very different scales, making it difficult to view them together. You can choose to

normalize the curves, so that each expands or contracts to fill the available plot area.

For example, the plot below shows two plant outputs together (Channel Grouping: All

option). The outputs have very different magnitudes. When plotted together, it's hard to

see much detail in the smaller response.

The plot below shows the normalized version, which displays each curve's variations

clearly.

The y-axis scale is no longer meaningful, however. If you want to know a normalized

signal's amplitude, use a data marker (see “Adding a Data Marker” on page 3-18).

Note that the two data markers on the plot below are at the same normalized y-axis

location, but correspond to very different amplitudes in the original (unnormalized)

coordinates.

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MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Specifiche Pagina 72