Search found 21 matches

by Erik Dijkstra
Wed Mar 05, 2014 7:00 am
Forum: OpenSim
Topic: CoordinateActuator forces reference frame
Replies: 0
Views: 148

CoordinateActuator forces reference frame

Hi, When running the Inverse Dynamics Tool one gets the forces/moments of the CoordinateActuators. I tried to find in which reference frame these forces/moments are expressed but could not find this in the documentation. My guess would be the parent body of the respective joint on which the Coordina...
by Erik Dijkstra
Tue Jan 21, 2014 6:54 am
Forum: OpenSim
Topic: Marker or point location in API
Replies: 2
Views: 310

Re: Marker or point location in API

Hi Ayman,

Thanks for the reply! I already found and figured out the ways to transform the points to another body.


Best regards,
Erik
by Erik Dijkstra
Thu Jan 16, 2014 1:51 am
Forum: OpenSim
Topic: Marker or point location in API
Replies: 2
Views: 310

Marker or point location in API

Hi, I would like to get the location of a point on a body through the API. The location of the point of interest should scale along with the body it is attached to. I haven't found a way to define a point on a body so the only option I could think of is to define a marker on the body and get its pos...
by Erik Dijkstra
Wed Nov 27, 2013 6:44 am
Forum: OpenSim
Topic: Implementation of Static Optimization
Replies: 2
Views: 612

Re: Implementation of Static Optimization

Daniel thank you for sharing your code. I think it will help me later on to get data from/feed data to the optimizer at intermediate levels and not just at the end. In the mean time I think I found the code which can help me to build a modified optimization. I downloaded the source code for OpenSim,...
by Erik Dijkstra
Mon Nov 25, 2013 7:07 am
Forum: OpenSim
Topic: Implementation of Static Optimization
Replies: 2
Views: 612

Implementation of Static Optimization

Hi all, I would like to perform an optimization with the OpenSim model using the API, preferably through MATLAB. However, I could not find out how I get all the necessary data from the model. My thought was to start from the Static Optimization from the Analysis Tool but I cannot find its implementa...
by Erik Dijkstra
Mon Nov 25, 2013 6:29 am
Forum: OpenSim
Topic: OpenSim crash in IK analysis
Replies: 3
Views: 968

Re: OpenSim crash in IK analysis

Hi James,

Thank you for the suggestion.
I tested a few times and so far it seems to solve the problem with the IK tool. Thanks!

Best regards,
Erik
by Erik Dijkstra
Tue Nov 19, 2013 2:35 am
Forum: OpenSim
Topic: OpenSim crash in IK analysis
Replies: 3
Views: 968

OpenSim crash in IK analysis

Hi all, I am trying to run Inverse Kinematics Tool in OpenSim 3.1.0 but I encounter some problems. First of all it does not auto fill the weighting section when loading the setup file. IK doesn't run without because then I get the following in the message window: Loaded model subject01 from file C:\...
by Erik Dijkstra
Fri Nov 15, 2013 1:39 am
Forum: OpenSim
Topic: Crashes During Joint Reaction Analyis
Replies: 10
Views: 7595

Re: Crashes During Joint Reaction Analyis

I have a similar problem. I run the Analyze Tool for Static Optimization from MATLAB.
I call the Analyze Tool in a loop but in the second iteration MATLAB suddenly shuts down. My error report looks similar to that from Liying, see attachment.

Best regards,
Erik
by Erik Dijkstra
Mon Jun 03, 2013 11:58 pm
Forum: OpenSim
Topic: Model offset during scaling
Replies: 0
Views: 165

Model offset during scaling

Hi all, I encounter a problem which I think is GUI related. When I am working on scaling a model, the new model appears in the view with a slight offset. Looking at the model and navigating in the view after a few scaling iterations becomes impossible as the model is no longer visible in the view. S...
by Erik Dijkstra
Tue Mar 12, 2013 8:22 am
Forum: OpenSim
Topic: Optimization constraints
Replies: 3
Views: 519

Re: Optimization constraints

Hi Ayman, Thank you for your reply. I successfully build the coordinate limits in the model. However, I can't seem to get the limits working by constraining in the optimization instead of in the model. I wrote an inequality constraint by getting the elbow coordinate value and specify that it should ...