Search found 1375 matches

by jimmy d
Mon Dec 16, 2019 8:15 am
Forum: OpenSim
Topic: Cannot post long question
Replies: 1
Views: 238

Re: Cannot post long question

My first suggestions is not to post a long question. People volunteer to answer questions and that takes time-- time that is in short supply. Long questions take a long time to read, think about, and formulate a response. You are less likely to get an answer if you ask such a question. Keep question...
by jimmy d
Fri Dec 13, 2019 8:15 am
Forum: OpenSim
Topic: .mot file
Replies: 2
Views: 413

Re: .mot file

You can leverage the Matlab Structs() and a conversion function to build your own motion files. Below is a simple example of defining a motion for a single time for three model coordinates. You can update easily by defining an array of coordinate values for each of the coordinates in your model. Goo...
by jimmy d
Tue Dec 10, 2019 7:21 am
Forum: OpenSense
Topic: Error importing APDM data
Replies: 5
Views: 819

Re: Error importing APDM data

Hi, Kevin-

The IMU tracking methods, including all the fixes, have been rolled into the upcoming OpenSim 4.1 release. The Beta release is almost ready to send out and I can ping you when it is ready to get tested if you would like to try it out?

-J
by jimmy d
Fri Dec 06, 2019 10:15 am
Forum: OpenSense
Topic: coordinate system of the sensors
Replies: 7
Views: 1344

Re: coordinate system of the sensors

Further, the tibia_r body knode BF_ at gastroc_r shows only a half body (half cylinder) with a single y-part. Maybe this is a bug. :?
This is not a body, it is a WrapObject. The behavior of the wrap object seems to be what it is designed for so I am not sure what the problem is?
by jimmy d
Fri Dec 06, 2019 8:41 am
Forum: OpenSim
Topic: Markers can't follow the motion
Replies: 2
Views: 397

Re: Markers can't follow the motion

It is hard from the picture to know what the behavior of the model marker R_Frame_upper is. What do you mean by 'markers can't follow the motion of the external parts'? Do the model markers stay in a single global location during an inverse kinematics simulation? Or does the marker move with the mod...
by jimmy d
Thu Dec 05, 2019 11:33 am
Forum: OpenSim
Topic: OpenSim 4 0 on Mac no Examples and Default Models
Replies: 1
Views: 233

Re: OpenSim 4 0 on Mac no Examples and Default Models

When you open the 4.0 GUI for the first time, it asks you where you want to install the resource folder. If you missed that, or not sure where you specified, you can for the GUI to re-ask you by typing installResources() in the GUI scripting shell window.
by jimmy d
Thu Dec 05, 2019 8:46 am
Forum: OpenSense
Topic: coordinate system of the sensors
Replies: 7
Views: 1344

Re: coordinate system of the sensors

Hi, Henrike-

We have been working on fixes to the bugs and they will be included in the soon-to-be-released OpenSim 4.1 beta. We can include you in the beta testing group if you would like to test the fixes?

Cheers,
-J
by jimmy d
Thu Dec 05, 2019 8:12 am
Forum: OpenSim
Topic: how to measure the bushing force
Replies: 4
Views: 861

Re: how to measure the bushing force

You can add a force analysis in the Analyses Pane
by jimmy d
Thu Dec 05, 2019 7:48 am
Forum: OpenSim
Topic: Matlab Crashes on initSystem() / Frame not connected error && motion can't be displayed
Replies: 7
Views: 1997

Re: Matlab Crashes on initSystem() / Frame not connected error && motion can't be displayed

Java exception occurred: java.io.IOException: Failed to connect Socket 'frame' of type Frame (details: Component 'tibia_r_geom_1' could not find '..' of type Frame. Make sure a component exists at this path and that it is of the correct type. Thrown at component.h:764 in getComponent().). In Object...
by jimmy d
Thu Dec 05, 2019 7:27 am
Forum: OpenSim
Topic: CMC - Muscle and tendon Stiffness
Replies: 2
Views: 539

Re: CMC - Muscle and tendon Stiffness

It may be useful to investigate the fiber lengths and velocities-- perhaps the fiber velocity is such that the muscle cannot generate hardly any force so the optimizer preferentially uses other actuators.