Thanks, Chris.

Hi all, I have a question related to the definition of external ground reaction forces as controls, to use the in an inverse dynamics analysis, and the realization of the system. In the model we have defined the Ground Reaction Forces as two sets of three Point Actuators and three Torque Actuators a...

Thanks, Tom,

I will try to follow your suggestions.

Míriam

Hi, Tom,

I've tried also to model the non-linear spring as an ExpressionBasedBushingForce and it also works OK.

Thanks,
Míriam

Hi all, I’m trying to model the knee motor of an active KAFO, which is intended for SCI patients. In the model, it is a CoordinateActuator that acts on the knee_angle coordinate. The workflow I want to use is to define an excitation pattern for the motor based on the controls for the knee torque tha...

Hi Tom,

I've solved this issue: The orthosis shank joint has the following orientation in parent: 0 3.1415 0, so I've put the same orientation for the Bushing and now it works OK.

Thanks again for your suggestions,
Míriam

Hi, Tom, thanks for your comments. I've tried the first approach and it works OK. I have the Bushing force defined between the calcn_r (and _l) and the tibia_r (and _l). I have computed the orientation that I have to enter for having an initial torque with ankle angle zero. For testing this, I have ...

Hi all, I want to model the orthosis ankle stiffness using Bushing Forces. I have done an experiment to find the rotational stiffness of the orthosis ankle joint. I assume that the expression is linear: Ankle_Torque = Ankle_Torque_0 + k*Ankle_angle So I have modeled it on the orthosis ankle joint, f...

Hi Apoorva, What I want to do is to model the ankle stiffness and the knee motor actuation. For trying different values, what I thought was to run different FD simulations (with different values for these two elements, and the controls for joint torques computed from the experimental motion through ...

Thanks, Tom,

I am working on the examples on SO and CMC.

But I would like to stay at torque level, without descending at muscles. It is possible to run a FD without considering muscles? What should I do for that?

Thanks again,
Míriam Febrer