Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Update second half of mass distribution chapter for 2023 #147

Merged
merged 4 commits into from
Mar 23, 2023
Merged

Update second half of mass distribution chapter for 2023 #147

merged 4 commits into from
Mar 23, 2023

Conversation

moorepants
Copy link
Owner

No description provided.

@moorepants
Addressed some of Peter's comments and moved Angular Momentum to a ne…
1cd38f6 
…w section at the end with an extra bit on ang momentum of principal axes.
@github-actions
Copy link

Preview this pull request here https://moorepants.github.io/htmlpreview/?https://github.com/moorepants/learn-multibody-dynamics/blob/preview-pr-147/index.html

@Peter230655
Copy link

Will you inform, when it becomes part of the lecture, so it is in 'nice' print?
Thanks!

@moorepants
Several 2023 updates to second half of mass chapter:
532f278 
- added remaining learning objectives
- added integral equation for the inertia of a body
- added an exercise about rotating an inertia matrix
- improved explanation of the principal inertia output
@moorepants moorepants marked this pull request as ready for review March 23, 2023 15:51
@moorepants
Copy link
Owner Author

Merging.

@moorepants moorepants merged commit 7ee5136 into master Mar 23, 2023
@moorepants moorepants deleted the update-mass2 branch March 23, 2023 16:03
@Peter230655
Copy link

Above eq(109) you write:
differential equations that are most useful for simulation when in a first order form.
I assume 'simulation' means numerical integration.

@Peter230655
Copy link

Parallel Axis Theorem
If you know the central inertia dyadic of a rigid body B (or equivalently a set of particles) about its mass center Bo
then it is possible to calculate the inertia dyadic about any other point O
Does $B_o$ have to be the mass center, or would the theorem also hold for any other point?
(Of course, it makes paractical sense to take $B_o$ as the mass center)

@Peter230655
Copy link

In the excercise below eq (150) you write:
Gvine the inertia...
I believe Gvine is a typo.

@Peter230655
Copy link

In the excercise below er (150) you write:
...the head tube angle is 68 degrees from the ground plane.
Is it obvious what this angle is, or would a sketch help?

@moorepants
Copy link
Owner Author

Does have to be the mass center, or would the theorem also hold for any other point?

I think it only holds for the mass center. I would have to check.

@Peter230655
Copy link

https://aapt.scitation.org/doi/10.1119/1.4994835
I think, this link gives a generalization of the Huygens Steiner theorem - but I did not study it

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers
No reviews
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.
2 participants
@moorepants @Peter230655