Change forces in Matlab

[Ana de Sousa]

Hello, I would like to know how may I change a force through Matlab code.
I know that for torques is:

Code: Select all

osimModel.updActuators().get('gear_load').addInControls(Vector(1, controlActionLoad(controlIteration)), modelControls);

But I would like to apply a force in a specific direction and in a specific point in a body. I would also like to change it at each iteration.

I appreciate any help with this matter.

[Dimitar Stanev]

You can use the PrescribedForce:

https://simtk.org/api_docs/opensim/api_ ... Force.html

Use case example:

https://github.com/opensim-org/opensim- ... t.cpp#L149

[Ana de Sousa]

Thank you for the response, Dimitar!

May I ask you how do I use PrescribedForce in Matlab? The example from the link is in cpp, and when I look for the same name in Matlab (PrescribedForce), it does not find it in org.opensim.modeling.*

[Ana de Sousa]

Sorry, actually, I am able to create the force, but I do not know how I change it in Matlab.

Code: Select all

% Create force
pelvis_Force = PrescribedForce(pelvis);

pelvis_Force.setName('pelvis_force');
pelvis_Force.setForceFunctions(Constant(0), Constant(250), Constant(0));

% Add the force to the model
osimModel.addForce(pelvis_Force); % Add the force to the model