Search found 1176 matches

by Thomas Uchida
Fri Sep 20, 2019 6:20 am
Forum: OpenSim
Topic: Inverse dynamics with no external reaction forces
Replies: 3
Views: 66

Re: Inverse dynamics with no external reaction forces

The Inverse Dynamics Tool computes the net joint forces/moments that are required to produce the motion you provide. Please see the documentation here: https://simtk-confluence.stanford.edu/display/OpenSim/Getting+Started+with+Inverse+Dynamics . You may also want to run through Tutorial 3 - Scaling,...
by Thomas Uchida
Fri Sep 20, 2019 6:14 am
Forum: OpenSim
Topic: Gait2354 model metabolic rate.
Replies: 1
Views: 39

Re: Gait2354 model metabolic rate.

Please see the references at the bottom of the "Simulation-Based Design to Reduce Metabolic Cost" page (https://simtk-confluence.stanford.edu/d ... bolic+Cost).
by Thomas Uchida
Fri Sep 20, 2019 6:09 am
Forum: OpenSim
Topic: Mass of actuators
Replies: 1
Views: 46

Re: Mass of actuators

You could adjust the mass and inertia of the Body to which the actuator is mounted, or you could create a new Body with the mass and inertia properties of your actuator and weld (https://simtk.org/api_docs/opensim/api_ ... ml#details) that Body to the finger.
by Thomas Uchida
Wed Sep 18, 2019 12:58 pm
Forum: OpenSim
Topic: using ScaleScaleSet
Replies: 2
Views: 72

Re: using ScaleScaleSet

There are example files in the Models directory, under "Gait2354_Simbody" and "Gait2392_Simbody". You could also use the GUI to create and save a setup file, and open the file in a text editor to see the syntax.
by Thomas Uchida
Wed Sep 18, 2019 7:29 am
Forum: OpenSim
Topic: Inverse dynamics with no external reaction forces
Replies: 3
Views: 66

Re: Inverse dynamics with no external reaction forces

I wanted to check the muscle effort involved in it, just due to the gravity (so without any external reaction forces) so I run a ID simulation
ID doesn't compute muscle forces; you should run Static Optimization or CMC.
by Thomas Uchida
Tue Sep 17, 2019 10:29 am
Forum: OpenSim
Topic: Display messages in MATLAB
Replies: 1
Views: 95

Re: Display messages in MATLAB

Please see Forum Topic 8603: viewtopicPhpbb.php?f=91&t=8603
by Thomas Uchida
Mon Sep 16, 2019 9:15 am
Forum: OpenSim
Topic: Undefined function or variable 'Storage'.
Replies: 1
Views: 42

Re: Undefined function or variable 'Storage'.

Have you run configureOpenSim.m in the new version of Matlab? https://simtk-confluence.stanford.edu/d ... nvironment
by Thomas Uchida
Mon Sep 16, 2019 9:11 am
Forum: OpenSim
Topic: How to convert XML file into osim model.
Replies: 6
Views: 196

Re: How to convert XML file into osim model.

Is there any another option to provide actuator to the gai2354model. Yes, you could edit the OSIM file manually (e.g., using Notepad++). You can use the XML Browser in the GUI to determine what code to add (Help menu -> XML Browser -> select the desired class), but you will need to modify the prope...
by Thomas Uchida
Sun Sep 15, 2019 3:31 pm
Forum: OpenSim
Topic: How to Use a Different Marker Set
Replies: 2
Views: 69

Re: How to Use a Different Marker Set

The "Marker (.trc) Files" page in the documentation might be helpful: https://simtk-confluence.stanford.edu/d ... c%29+Files.
by Thomas Uchida
Fri Sep 13, 2019 7:10 pm
Forum: OpenSim
Topic: how CoM calculation of BodyKinematics works in Analyze Tool?
Replies: 3
Views: 93

Re: how CoM calculation of BodyKinematics works in Analyze Tool?

I found the function "get_mass_center()". It seems to get the mass center of the body. So I want to know how the function "get_mass_center()" works? What's the equation it uses? There is no equation because the center of mass is a property of the Body (see the API documentation for the get_mass_cen...