## Search found 136 matches

Thu May 30, 2019 2:05 pm
Forum: OpenSim
Topic: Converting c3d to mot
Replies: 1
Views: 724

### Re: Converting c3d to mot

You could contact the owners of that project: https://simtk.org/projects/c3d2opensim
Or you could search the forum to find similar questions and answers: viewtopicPhpbb.php?f=91&t=10025&p=0&start=0&view=
Thu May 30, 2019 1:55 pm
Forum: OpenSim
Topic: Joint in Opensim Model
Replies: 2
Views: 679

### Re: Joint in Opensim Model

The SpatialTransform in OpenSim describes how the Child frame moves with respect to the Parent frame of a CustomJoint. It specifies the permissible movement (by user provided functions) on 6 axes (3 rotational and 3 translational TransformAxes) parameterized by generalized coordinates (the joint's c...
Thu May 30, 2019 1:37 pm
Forum: OpenSim
Topic: CEINMS tutorial
Replies: 1
Views: 555

### Re: CEINMS tutorial

Consider posting on the CEINMS forum: indexPhpbb.php?group_id=840&pluginname=phpBB
Thu May 30, 2019 1:31 pm
Forum: OpenSim
Topic: Coordinate frame of Joint angles in "kinematics" analysis
Replies: 1
Views: 504

### Re: Coordinate frame of Joint angles in "kinematics" analysis

Thu May 30, 2019 1:24 pm
Forum: OpenSim
Topic: Joint lock constraint is ignored when calculating ResidualForce?
Replies: 5
Views: 1137

### Re: Joint lock constraint is ignored when calculating ResidualForce?

You do not need additional actuators to lock a joint. You either a.) care about the coordinate force necessary to enforce the lock (that is what ID provides now) or b.) you don't, in which case can simply ignore what ID computes. Adding an actuator to enforce the lock (to result in zero residual) wo...
Mon Mar 18, 2019 1:58 pm
Forum: OpenSim
Topic: Scapulothoracic joint model not opening
Replies: 13
Views: 3151

### Re: Scapulothoracic joint model not opening

It could be helpful to see the command(s) you entered in the scripting shell. Some guesses are that you may not be providing the complete path to library and/or you a providing the library's file extension.
Wed Mar 06, 2019 10:22 am
Forum: OpenSim
Topic: add distributed force to model
Replies: 2
Views: 788

### Re: add distributed force to model

Adding PrescribedForces seems like the right way to go if you want apply external forces at known points on the model as functions of time. If it is point forces between bodies in the model, then use a variant of a PointToPointForce (Spring, ExpressionBased or Actuator).
Wed Mar 06, 2019 10:07 am
Forum: OpenSim
Topic: MoBL_ARMS - Mistake in ID
Replies: 3
Views: 945

### Re: MoBL_ARMS - Mistake in ID

A couple of things come time mind: 1. Is it possible that the handle is imparting large moments on the hand that requires very large shoulder internal rotation and forearm pronation moments (e.g. to twist the handle) to oppose it? How is the handle modeled and which "r_z" coordinate was limited and ...
Fri Feb 08, 2019 3:43 pm
Forum: OpenSim
Topic: Scapulothoracic joint model not opening
Replies: 13
Views: 3151

### Re: Scapulothoracic joint model not opening

Plugins (MacOSX, WinX64) for 4.0 were just added to the SimTK page for the SacpulothoracicJoint: https://simtk.org/frs/download_confirm. ... oup_id=986
Wed Oct 24, 2018 9:14 pm
Forum: 2018 Fall OpenSim Virtual Workshop
Topic: Seth model availabilty [SOLVED]
Replies: 4
Views: 1096

### Re: Seth model availabilty

Validating muscles that control the scapulothoracic joint is a work in progress. Which muscles are you interested in?