Hi everyone, I've been trying to use RRA in a case where I have an exoskeleton model attached to a skeletal model (without muscles) using bushing forces and RRA has been crashing. This was a case where I wanted to perform an ID analysis to calculate the forces applied by the human, to achieve a spec...

Hi Nick, I appreciate your prompt response. I was wondering whether there was something available that I was missing. I also found out about the ExpressionBasedCoordinateForce function which might also turn out to be useful. I will need to test whether the mathematical expressions/functions I want t...

Hello everyone, I've been trying to carry out an inverse dynamics analysis on a human-exoskeleton model but struggle to find the OpenSim tool which is best suited to my problem. The task: In its simplest form the task can be abstracted as a bicep curl, where the shoulder is locked and the elbow can ...

Hello everyone, Is it possible to change the muscle activation model through MATLAB? I noticed that one property of Millard2012AccelerationMuscle is 'MuscleFirstOrderActivationDynamicModel' and I can see in Doxygen that a class for 'MuscleSecondOrderActivationDynamicModel' exists. Is there a method ...