Kathleen, what CAD-system do you use? I developed an extension for CREO (Pro/Engineer) that can convert open chain mechanisms to OpenSim multibody models. Please contact me if you want me to convert your assembly.
Daniel
Search found 24 matches
- Wed Aug 10, 2016 5:14 am
- Forum: OpenSim
- Topic: Importing a CAD Model Into OpenSim
- Replies: 2
- Views: 693
- Tue Apr 12, 2016 1:23 am
- Forum: OpenSim
- Topic: Decorative Geometry in GUI
- Replies: 2
- Views: 612
Re: Decorative Geometry in GUI
Thanks Ayman,
I think I' ll just wait for the 4.0 release. Since I have some students working with my models It wouldn't make sense to let them work with a pre-release. So we stick with 3.2.
At least I know that my implementation is correct.
Regards,
Daniel
I think I' ll just wait for the 4.0 release. Since I have some students working with my models It wouldn't make sense to let them work with a pre-release. So we stick with 3.2.
At least I know that my implementation is correct.
Regards,
Daniel
- Mon Apr 11, 2016 10:06 am
- Forum: OpenSim
- Topic: Decorative Geometry in GUI
- Replies: 2
- Views: 612
Decorative Geometry in GUI
Hi all, I recently implemented a custom force model component and implemented the ModelComponent method "generateDecorations()" to visualize my force within the GUI. However the decorations only show up within the OpenSim visualizer. The GUI seems to ignore them. Is there an alternative way to equip...
- Sun Nov 08, 2015 6:01 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: sensitivity of jacobian transpose force mapping
- Replies: 1
- Views: 437
sensitivity of jacobian transpose force mapping
Hi all, I am working on an inverse kinematics solution that accounts for static equilibrium conditions. The goal is to find system configurations q that a) satisfy several kinematic tasks (e.g. reaching for an object) b) allow the system to be in static equilibrium meaning that in mobility space all...
- Mon May 11, 2015 4:32 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Constraint forces and implementation
- Replies: 3
- Views: 819
Re: Constraint forces and implementation
Ok, and here what I did with it so far: We are currently working on a project dealing with FEA simulations of human bones. Therefore we want to use force boundary conditions obtained from OpenSim models. This includes all muscle forces, joint reactions and constraint forces directly applied to a bod...
- Mon May 11, 2015 4:09 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Constraint forces and implementation
- Replies: 3
- Views: 819
Re: Constraint forces and implementation
This is Sherm's reply: 1) The Constraint base class methods can only deal with features common to all constraints, but a "point of application" only makes sense for certain constraints. Some constraints act on joint axes rather than bodies (couplers), some apply pure torques to bodies (orientation c...
- Mon May 11, 2015 4:08 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Constraint forces and implementation
- Replies: 3
- Views: 819
Constraint forces and implementation
The following two questions on Simbodys kinematic constraints were originally discussed between Sherm an me. However since others might be interested as well, I start this new topic: 1) In Simbody a constraint provides the method Constraint:getConstraintForcesAsVectors() to obtain the corresponding ...
- Fri Oct 31, 2014 1:57 am
- Forum: OpenSim
- Topic: Kinect as input for model/motion
- Replies: 4
- Views: 2041
Re: Kinect as input for model/motion
Hello Everyone, we created a software to record motion sequences to opensim using the kinect device. It is not as easy as one might think. Since the KINECT SDK only gives you the spatial orientations of limbs as a rotation matrix, you have to determine the joint angles by decomposing this matrix int...
- Thu Oct 23, 2014 2:48 am
- Forum: OpenSim
- Topic: any function to calc position of a point rel to ground?
- Replies: 4
- Views: 1857
Re: any function to calc position of a point rel to ground?
Hey Sina,
there is a more direct way of transforming the coordinates from a local cos to the global "ground" cos.
Take a look at the method: model.getSimbodyEngine().transformPosition(..)
Best Regards,
Daniel
there is a more direct way of transforming the coordinates from a local cos to the global "ground" cos.
Take a look at the method: model.getSimbodyEngine().transformPosition(..)
Best Regards,
Daniel
- Mon Oct 20, 2014 7:44 am
- Forum: OpenSim
- Topic: CMC results on "free" motions reasonable?
- Replies: 1
- Views: 1039
CMC results on "free" motions reasonable?
Hi everyone, my colleague and me were currently discussing about CMC simulations. Out of curiosity I created a model of a simple 1-DOF pendulum with a coordinate actuator assigned to the pivot. We simulated 0.5 seconds of free swinging motion using the forward dynamic tool. Free means no excitation ...