Tunable Parameter/Gain and rapid acceleration

I am having difficulty using Tunable parameters. Here is how it looks inside simulink mdl = 'Mymodel.mdl':

 *  Constant Block (value 1)---> GainA -> mpt.paramter constant block

I will be running this simulation on a single set of input dataset in a for loop, changing the gain for each itiration (with same input vector).

Sample Code:

 for i=1:10000
    if i==1
      rtp = Simulink.BlockDiagram.buildRapidAcceleratorTarget(mdl);
    end
  Simulink.BlockDiagram.modifyTunableParameters(rtp,'GainA',Input_Gain(i));
  SimOutput = sim(mdl,'SimulationMode','rapid','RapidAcceleratorUpToDateCheck','off');
 end
-----------

This code need to build new rapid target for each itiration else it runs same model again and again without changing GainA. Is there any way around?

Answer 1

[Kaustubha Govind]

But you never pass the modified parameter into SIM right? Simulink.BlockDiagram.modifyTunableParameters creates a new RTP structure. It doesn't apply it to the model.

Try:

rtp = Simulink.BlockDiagram.buildRapidAcceleratorTarget(mdl);
for i=1:10000
  new_rtp = Simulink.BlockDiagram.modifyTunableParameters(rtp, ...
                                                'GainA',Input_Gain(i));
  SimOutput =  sim(mdl,'SimulationMode','rapid', ... 
                   'RapidAcceleratorUpToDateCheck','off', ...
                   'RapidAcceleratorParameterSets', new_rtp);
end

Answer 2

[Jayesh Kavathe]

Cant thank you enough for a quick solution on this! This works perfectly for me :)

[Paul]

I looked through the Simulink R2012A documentation on TMW website for the functions Simulink.BlockDiagram.modifyTunableParameters and

Simulink.BlockDiagram.buildRapidAcceleratorTarget and couldn't find them. Can someone point me to the doc page where I can learn about them?

[Kaustubha Govind]

Paul: Unfortunately, it doesn't look like there is a doc page, but you can find some information using "help Simulink.BlockDiagram.modifyTunableParameters" and "help Simulink.BlockDiagram.buildRapidAcceleratorTarget". I found information about the usage from this demo: http://www.mathworks.com/products/simulink/demos.html?file=/products/demos/shipping/simulink/sldemo_parfor_paramsweep_suspn_raccel.html