Hi Nick, for the purpose of this workshop that works well, thanks a lot. # Create ipopt.opt file with the specified options with open("ipopt.opt", "w") as file: file.write("output_file opensim.log\n") file.write("file_append yes\n") solution = study.solve() # Display the content of the Ipopt output ...

Hi everyone! I'm preparing a workshop on Moco and setting up an environment in Google Colab to run some examples. Here's the link: https://colab.research.google.com/drive/1rzxUwK_c0FF4HxPmxMkvLQYZBjtDsTzs?usp=sharing Everything works well: I installed OpenSim successfully and was able to run a simpl...

Hi Nick! Thank you so much for your response, it couldn't have come at a better time for my project! The recent release was exactly what I needed. :D I just updated my Conda environment to the latest version and downloaded the new Moco inverse example from the official OpenSim documentation. Then, I...

Hey Pasha, thanks again for your suggestions! Unfortunately, I can't create a Controller because it's an abstract class and can't be instantiated. I tried a quick workaround using PrescribedController: my_controller = osim.PrescribedController() my_controller.addActuator(muscle_rect_fem_r) model.add...

Hi Pasha, thanks a lot for the response! I need to understand more about OpenSim's structure to implement this properly. For instance, I'm a bit confused about the roles of muscles, actuators, and controllers in the framework. I was playing around with your code today: 1. I cannot seem to be able to...

Hi everyone! I'm working on a project, and I need some advice. I want to group muscles in a specific area to share the same activation . Is there a way to do this in OpenSim Moco, or does it need to be handled in OpenSim itself (by modelling)? For example, my model has two muscles: the rectus femori...

Hi Johanna, for your information, we've included a new version (1.1) that solves the path issue.

Thanks a lot for your response, Thomas. In our cycling analysis, we are using the marker positions and external forces applied to the feet to calculate the joint moments through ID. However, since we do not have data on the forces exerted at the seat, the computed residual wrench encompasses these u...

Hi all, I'm working with some data and considering using the Residuals Reduction Algorithm (RRA). My datasets are 1. Leg extension exercise: I collected markers data and force platform data (both feet). But I'm missing the forces on the chair as the person is seated. 2. Seated cycling: I collected m...

Hi Johanna, thanks for the message. I'll add the relative paths in a future version!

Meanwhile, you can edit the XML file and point to the path in your computer to CyclingGeometry. Worst case scenario this is just a matter of visualisation and shouldn't matter in terms of simulations.