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Construct Linear Time Invariant (LTI) Models

2-15

Use setmpcsignals to make type definition. For example

CSTR = setmpcsignals(CSTR, 'UD', 2, 'UO', 2);

sets InputGroup and OutputGroup to the same values as in the previous example. The

CSTR display would then include the following lines:

Input groups:

Name Channels

Unmeasured 2

Manipulated 1

Output groups:

Name Channels

Unmeasured 2

Measured 1

Notice that setmpcsignals sets unspecified inputs to Manipulated and unspecified

outputs to Measured.

LTI Model Characteristics

Control System Toolbox software provides functions for analyzing LTI models. Some

of the more commonly used are listed below. Type the example code at the MATLAB

prompt to see how they work for the CSTR example.

Example Intended Result

dcgain(CSTR) Calculate gain matrix for the CSTR model's

input/output pairs.

impulse(CSTR) Graph CSTR model's unit-impulse response.

linearSystemAnalyzer(CSTR) Open the Linear System Analyzer with the

CSTR model loaded. You can then display

model characteristics by making menu

selections.

pole(CSTR) Calculate CSTR model's poles (to check

stability, etc.).

step(CSTR) Graph CSTR model's unit-step response.

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MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Specifiche Pagina 27