Search found 47 matches

by Musa Audu
Wed Jul 17, 2024 1:58 pm
Forum: Simbody: SimTK multibody dynamics API
Topic: SimTK Initial Velocity Analysis:
Replies: 2
Views: 2322

Re: SimTK Initial Velocity Analysis:

Great! Thanks Sherm. I'll look into that. I appreciate your help.
by Musa Audu
Wed Jul 17, 2024 1:14 pm
Forum: Simbody: SimTK multibody dynamics API
Topic: SimTK Initial Velocity Analysis:
Replies: 2
Views: 2322

SimTK Initial Velocity Analysis:

Is there a SimTK function to do initial velocity analysis for a closed-loop system? Something similar to sdinitvel function of good old SDFAST?
Thanks.
Musa
by Musa Audu
Thu Jul 11, 2024 12:13 pm
Forum: OpenSim
Topic: Using SimTK Assemblar object to assemble Closed-Chain systems
Replies: 2
Views: 2645

Re: Using SimTK Assemblar object to assemble Closed-Chain systems

Thanks a lot Sherm. That works for compilation. Now I have another problem. The assembler only runs once: assembler.getNumAssemblySteps() = 1 and assembler.getNumGoalEvals() = 1. The gen coords are not changed from their mis-assembled values. Am I doing something wrong or missing a step somewhere? T...
by Musa Audu
Thu Jul 11, 2024 9:58 am
Forum: OpenSim
Topic: Using SimTK Assemblar object to assemble Closed-Chain systems
Replies: 2
Views: 2645

Using SimTK Assemblar object to assemble Closed-Chain systems

We are trying to enforce constraints for a system with closed-chains using the Assembler object using the following: auto &system = osimModel.getMultibodySystem(); Assembler assembler(system); assembler.assemble(state); This assembles the model but most of the generalized coordinate bounds were viol...
by Musa Audu
Fri Apr 12, 2024 12:14 pm
Forum: OpenSim
Topic: MocoOutputTracking Goal Problems:
Replies: 2
Views: 610

Re: MocoOutputTracking Goal Problems:

Great. Thanks Nick. We do use the setOutputIndex() function to select the desired index of the vector to use for the foot position. We appreciate your insight and look forward to a future version that allows inclusion of dynamic stretching of the reference desired trajectory to match the current tim...
by Musa Audu
Fri Apr 12, 2024 8:09 am
Forum: OpenSim
Topic: MocoOutputTracking Goal Problems:
Replies: 2
Views: 610

MocoOutputTracking Goal Problems:

Hi, We have two questions that we hope someone can help us with: Q.1. We want to track the trajectory of a particular body segment (such as the toes) with MocoOutputTrackingGoal. We defined the output path for the body as: "FootGoal->setOutputPath("/bodyset/ltoes|position");". Is this the correct wa...
by Musa Audu
Fri Jul 29, 2022 2:56 pm
Forum: OpenSim
Topic: Controller Plugin crashes OpenSim
Replies: 0
Views: 333

Controller Plugin crashes OpenSim

I have a problem that started since OpenSim 4.2 and up to the current 4.4. I defined a muscle controller function and created a dll file as a plugin for it. In these versions of OpenSim, the GUI will only load the model files containing this controller if I add the file to a 'plugin' folder and put ...
by Musa Audu
Sat Apr 02, 2022 9:11 am
Forum: OpenSim
Topic: Building C++ code in Windows Visual Studio with OpenSim static libraries
Replies: 0
Views: 205

Building C++ code in Windows Visual Studio with OpenSim static libraries

Has anyone succeeded in building a Windows Visual Studio API application (C++) with OpenSim static libraries only? I have tried this in several ways with no success. I will appreciate any insight on how to do this if at all it is possible.
by Musa Audu
Sun Jul 25, 2021 3:39 pm
Forum: OpenSim
Topic: Plugin Error:
Replies: 5
Views: 1147

Re: Plugin Error:

Thank you very much for that guidance. It works; after I have cleaned out my previous API installation and made a fresh installation with a more recent version. Apparently I must have been mixing versions of the API and GUI installations. Thank you.
by Musa Audu
Wed Jul 21, 2021 8:17 pm
Forum: OpenSim
Topic: Virtual IMUs with IMUPlacer:
Replies: 2
Views: 526

Re: Virtual IMUs with IMUPlacer:

Great, Thanks Ayman. I will get to that version and see how this works.