Configure Referenced Model to Use Model Arguments Grouped Into Structure

You can use structures to reduce the effort of maintenance when you want to add, rename, or delete arguments. With structures, the mathematical functionality of the models is the same.

To replace the parameter values with structures forex_model_arg_refandex_model_arg, follow these steps.

Open modelex_model_arg_ref. This model represents a reusable algorithm.

open_system('ex_model_arg_ref')

Create a structure that contains one field for each of the parameter objects that exist in theex_model_arg_refworkspace. Specify a value for each field.

structForInst1.gain = 3.17; structForInst1.coeff = 1.05;

Store the structure in aSimulink.Parameterobject.

structForInst1Param = Simulink.Parameter(structForInst1);

Copy theSimulink.Parameterobject into theex_model_arg_refmodel workspace. For this example, name the copy of the objectstructArg.

modelWorkspace = get_param('ex_model_arg_ref','ModelWorkspace'); assignin(modelWorkspace,'structArg',copy(structForInst1Param));

ConfigurestructArgas the only model argument.

set_param('ex_model_arg_ref','ParameterArgumentNames','structArg')

In theex_model_arg_refmodel, set theGain参数的获得块structArg.gainand set theNumeratorparameter of the Discrete Filter block tostructArg.coeff.

set_param('ex_model_arg_ref/Gain',“获得”,'structArg.gain') set_param('ex_model_arg_ref/Discrete Filter',...'Numerator','structArg.coeff')

Copy the existing structure asstructForInst2Param.

structForInst2Param = copy(structForInst1Param);

Set the field values in the two structures to the same numbers that you used to set the model argument values in the Model blocks.

structForInst1Param.Value.coeff = 0.98; structForInst1Param.Value.gain = 2.98; structForInst2Param.Value.coeff = 1.11; structForInst2Param.Value.gain = 3.34;

Open modelex_model_arg. This model represents a system model that uses multiple instances of the reusable algorithm.

open_system('ex_model_arg')

For model instanceModel, setstructArgtostructForInst1Param. For model instanceModel1, setstructArgtostructForInst2Param.

instSpecParamsStruct = get_param('ex_model_arg/Model','InstanceParameters'); instSpecParamsStruct1 = get_param('ex_model_arg/Model1','InstanceParameters'); instSpecParamsStruct(1).Value ='structForInst1Param'; instSpecParamsStruct1(1).Value ='structForInst2Param'; set_param('ex_model_arg/Model','InstanceParameters',instSpecParamsStruct); set_param('ex_model_arg/Model1','InstanceParameters',instSpecParamsStruct1);

Use Bus Object as Data Type of Structures

You can use aSimulink.Busobject as the data type of the structures. The bus object makes sure that the characteristics of the instance-specific structures, such as the names and order of fields, match the characteristics of the structure in the model workspace.

To set the data type of the structures to bus objects, follow these steps.

Use theSimulink.Bus.createObjectfunction to create the bus object. The hierarchy of elements in the object matches the hierarchy of the structure fields. The default name of the object isslBus1.

Simulink.Bus.createObject(structForInst1Param.Value);

Rename the bus object by copying it.

myParamStructType = copy(slBus1);

Set the data type of the parameter objects in the base workspace by using the bus object.

structForInst1Param.DataType ='Bus: myParamStructType'; structForInst2Param.DataType ='Bus: myParamStructType';

For thestructArgobject, setDataTypetoBus: myParamStructType.

temp = getVariable(modelWorkspace,'structArg'); temp = copy(temp); temp.DataType ='Bus: myParamStructType'; assignin(modelWorkspace,'structArg',copy(temp)); close_system('ex_model_arg_ref',0) close_system('ex_model_arg',0)