Search found 4 matches
- Tue Oct 31, 2023 12:07 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Modal Analysis
- Replies: 3
- Views: 1075
Re: Modal Analysis
Hi Sherm, thanks for your reply. The documentation states that calcSystemJacobian() returns a mapping from generalized speeds to the spatial velocities of all the bodies. In contrast, the modal analysis requires the derivatives of the system equations of motion with respect to the generalized coordi...
- Mon Oct 30, 2023 4:06 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Modal Analysis
- Replies: 3
- Views: 1075
Modal Analysis
Hi,
the 'Simbody Theory Manual' mentions that modal analyses could be performed using the dynamic, internal coordinate Jacobian. Is this actually possible with the current Simbody version?
Thank you!
Simon
the 'Simbody Theory Manual' mentions that modal analyses could be performed using the dynamic, internal coordinate Jacobian. Is this actually possible with the current Simbody version?
Thank you!
Simon
- Tue Sep 27, 2022 10:33 pm
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Constraints between massless bodies
- Replies: 2
- Views: 673
Re: Constraints between massless bodies
Hi Sherm,
thank you for the prompt reply. I will modify my model to avoid the singularity.
Regards,
Simon
thank you for the prompt reply. I will modify my model to avoid the singularity.
Regards,
Simon
- Tue Sep 27, 2022 6:16 am
- Forum: Simbody: SimTK multibody dynamics API
- Topic: Constraints between massless bodies
- Replies: 2
- Views: 673
Constraints between massless bodies
Hi, is it possible to enforce constraints between parts if one side of the constraint is massless? An example would be one massless pendulum in 'ExampleCustomConstraint.cpp', which results in 'nan's on my machine. I suppose that this fails because the constraint forces need some non-zero inertia ele...