MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Especificaciones descargar pdf (Pagina 26)

2 Building Models

2-14

Input and Output Types

General Case

As mentioned in “Signal Types” on page 2-8, Model Predictive Control Toolbox software

supports three input types and two output types. In a Model Predictive Control Toolbox

design, designation of the input and output types determines the controller dimensions

and has other important consequences.

For example, suppose your plant structure were as follows:

Plant Inputs Plant Outputs

Two manipulated variables (MVs) Three measured outputs (MOs)

One measured disturbance (MD) Two unmeasured outputs (UOs)

Two unmeasured disturbances (UDs) 

The resulting controller has four inputs (the three MOs and the MD) and two outputs

(the MVs). It includes feedforward compensation for the measured disturbance, and

assumes that you wanted to include the unmeasured disturbances and outputs as part of

the regulator design.

If you didn't want a particular signal to be treated as one of the above types, you could do

one of the following:

• Eliminate the signal before using the model in controller design.

• For an output, designate it as unmeasured, then set its weight to zero (see “Output

Weights”).

• For an input, designate it as an unmeasured disturbance, then define a custom state

estimator that ignores the input (see “Disturbance Modeling and Estimation”).

Note By default, the toolbox assumes that unspecified plant inputs are manipulated

variables, and unspecified outputs are measured. Thus, if you didn't specify signal

types in the above example, the controller would have four inputs (assuming all

plant outputs were measured) and five outputs (assuming all plant inputs were

manipulated variables).

For model CSTR, default Model Predictive Control Toolbox assumptions are incorrect.

You must set its InputGroup and OutputGroup properties, as illustrated in the above

code, or modify the default settings when you load the model into the design tool.

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DN788	User Manual LG DN788 User's Manual, 24 pages
HT355SD-A2	User Manual LG HT355SD-A2 User's Manual, 32 pages
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DVX642H	User Manual LG DVX642H User's Manual, 24 pages
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DR787T	Specifications LG DR787T Specifications, 2 pages
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DVX692H	User Manual LG DVX692H User manual, 24 pages
LHX-557	User Manual LG LHX-557 User's Manual, 56 pages
VT 4015	User Manual LG VT 4015 User's Manual, 28 pages
LH-T1000	User Manual LG LH-T1000 User's Manual, 36 pages
DGK775	User Manual LG DGK775 User manual, 50 pages
LDA-730	User Manual LG LDA-730 User's Manual, 44 pages
DH4220S	User Manual LG DH4220S User's Manual, 40 pages
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MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Especificaciones Pagina 26