MATLAB: Can I tune a structure field or a parameter type of non-double with Simulink Design Optimizer 1.1(R2009b)

Simulink Design Optimization

I have a parameter in a model that is the field of a structure. For example, for the "Value" field in the dialog box of a Gain block, I may dereference a structure such as struct.gainval. I wish to use Simulink Design Optimizer on this field but I am not able to select it from the tunable parameters list because it is not there.

Best Answer

It is not possible to select a structure or the field of a structure for a tunable parameter in Simulink Design Optimizer 1.1 (R2009b).

As a workaround, you must create a scalar double from the structure and use the parameter of type double in the dialog box.

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MATLAB: Do I receive an error when trying to linearize a model with inport block of non-double datatype as the input point in Simulink Control Design

This enhancement has been incorporated in Release 2007b (R2007b). For previous product releases, read below for any possible workarounds:

The ability to handle external inputs (inport blocks) of non-double or complex datatypes is not available with the Simulink Control Design Toolbox.

To work around this issue, use an inport block of double data type and then use a signal-conversion block after the inport block to convert the signal back to the required data type.

MATLAB: Block parameter and values in simulink

get_param(gcb,'DialogParameters')

That function returns a struct with all of the dialog parameters for the current block. Or replace gcb with the name of whatever block you care about. The fields of that struct define the parameters of the block that you can interrogate. For a Gain block:

>> d=get_param(gcb,'DialogParameters')
d = 
  struct with fields:
                         Gain: [1×1 struct]
               Multiplication: [1×1 struct]
                     ParamMin: [1×1 struct]
                     ParamMax: [1×1 struct]
             ParamDataTypeStr: [1×1 struct]
                       OutMin: [1×1 struct]
                       OutMax: [1×1 struct]
               OutDataTypeStr: [1×1 struct]
                    LockScale: [1×1 struct]
                      RndMeth: [1×1 struct]
    SaturateOnIntegerOverflow: [1×1 struct]
                   SampleTime: [1×1 struct]
>> get_param(gcb,'OutMax')
ans =
    '[]'

Best Answer

Related Solutions

MATLAB: Do I receive an error when trying to linearize a model with inport block of non-double datatype as the input point in Simulink Control Design

MATLAB: Block parameter and values in simulink

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