mechmotum / ollie-optimization Goto Github PK

Johnny (2013) Skateboarding Is My
Lifetime Sport: DECK LENGTH
MEASURING BY COMPANY. URL
http://skateboardingismylifetimesport.
blogspot.com/2013/05/
deck-length-measuring-by-company.html

Only first name. Just a URL. Not really an good citation. All caps.

I'd like to rename the directory with the paper to "paper" and add a Makefile that can build the paper. Following that I may add the paper build to the CI. But just some tidying first.

Some of the tables, especially the one in the caption of figure 1, need to be improved to make them more aesthetic.

• Decide what we want to submit as supporting documents:
  • PDF of Jan's thesis
  • Single Python file for optimisations
• Clean up GitHub repository

Reviewer 2:
“Immediately prior to the impact of the tail with the ground, the skateboard rapidly moves backward.”

With respect to the human?

This can be a tracking issue for ideas on cutting the words.

• Move the equations of motion derivation to an appendix (or remove all together).

reviewer 2:

Does “nose-tail symmetry” mean the symmetry around the center of gravity along the longitudinal direction?
Probably, I misunderstood.
Fig.3 does not look like the symmetry around the center of gravity along the longitudinal direction.

Do we have any progress on getting smoother solutions? Any new results to show?

Do we have any idea if we are closer to getting global instead of local solutions?

If so, it'd be great to share the figures with the new results. If not, what's the status?

I was always taught that speed = scalar quantity and velocity = vector quantity. So if we are not referring to a quantity that has a vector component then we should use speed.

E.g.

"The first two introduce $\psi_1$, a slack variable representing the magnitude of the relative speed between the foot and the skateboard $\dot{s}_1$."

TO DO BEFORE CLOSING:

• Merge table 1 ("skateboard variables") into the caption of figure 3 ("skateboard parameterisation").
• Remove figure 4 ("skateboard segments").

See the guidelines: https://www.springer.com/journal/12283/submission-guidelines#Instructions%20for%20Authors_Manuscript%20Submission

@jtheinen says that it's on instagram, does that make it public and fair use?

Should he:

• message the guy and ask permission?
• who owns the IP, is it the subject or the photographer?

We can't include copyrighted figures/images in the paper without permission. Three options:

1. The figure is CC licensed and maybe we can include it if the journal allows.
2. We remove it (and repalce with our own figure if needed).
3. We ask the copyright holder for permission.

reviewer 2:
“During wheel-ground contact, we use a sliding joint for the rear wheel contact to eliminate the ground reaction forces from the equations of motion (EoMs).”

Probably, I misunderstood.
Were the ground reaction forces in the vertical direction considered?

reviewer 2:
Caption Fig. 3
CoM -> CoM (Center of Mass)
Probably, here is the first appearance of CoM.

Find out ORCID for all authors as this is requested by the submission guidelines.

• Supply all figures electronically.
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• Name your figure files with "Fig" and the figure number, e.g., Fig1.eps.

Line Art

• Definition: Black and white graphic with no shading.
• Do not use faint lines and/or lettering and check that all lines and lettering within the figures are legible at final size.
• All lines should be at least 0.1 mm (0.3 pt) wide.
• Scanned line drawings and line drawings in bitmap format should have a minimum resolution of 1200 dpi.
• Vector graphics containing fonts must have the fonts embedded in the files.

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• Combination artwork should have a minimum resolution of 600 dpi.
• Color Art
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• If the figures will be printed in black and white, do not refer to color in the captions.
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Figure Lettering

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Figure Captions

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I think it is best to license the source code with an OSI approved license. I suggest MIT or BSD to keep things simple. The paper text can be licensed CC-BY 4.0. CC-BY is slightly problematic for resuing source code.

See: https://opensource.stackexchange.com/questions/9242/why-does-creative-commons-recommend-not-using-cc-by-licenses-for-software

Reviewer 1 asked if the 'dragging up motion' contributes significantly and whether we could show this with our simulation.

We have multiple options:

1. Show already present simulation of the pennyboard without friction, he can see that the ollie will be lower
2. Solve base optimization without friction and show the difference.

original text by reviewer 1:

You wrote "for the human to ... then slide the front foot over the deck to drag it up" at the Discussion section 8th line.
This corresponds to the timing of t5 in Fig. 1.
Do you think how much the effect of this dragging up motion is? I mean, the contribution of the friction force between the board and fore foot to the Ollie height at the timing of t5.
Can you show the effect in your simulation?
I asked it since for example the Ollie jump was realized without this dragging up motion in the simulation of the reference [21].
Basically, the force normal to the board from the fore foot at t5 is considered to be small, so the tangential friction force will become very small as well.
Therefore, the effect of dragging up motion of the fore foot might be negligibly small.
Please add some text about this issue in the revised manuscript.

It may make it easier for Eline and Raymund to contribute if we used overleaf.

If you create an overleaf project you can sync it with a git repo. I've done that with other projects, but I think you may have to start at overleaf, getting the git url, then clone on github. You have to manually sync from github or maybe you can setup ci to do it.

Overleaf does resolve the problem of simultaneous editing and it has better ways to make comments and suggest changes.

Thoughts?

I've heard a few times now that the paper is close to 4000 words and that it would be shared so we can help shorten in. It is now the end of March. Please give us the latest version of the paper so that we can help edit it down.

cc/ @jtheinen

I think this is just a copy of the downloaded template, right?

All three simulation figures should be the same size.

• All tables are to be numbered using Arabic numerals.
• Tables should always be cited in text in consecutive numerical order.
• For each table, please supply a table caption (title) explaining the components of the table.
• Identify any previously published material by giving the original source in the form of a reference at the end of the table caption.
• Footnotes to tables should be indicated by superscript lower-case letters (or asterisks for significance values and other statistical data) and included beneath the table body.

I'm working on editing the paper and we have to change it to active voice. It is quite hard to read in passive voice. In my edits, I will start doing this, but we need to change it fully before submission. It will simplify the writing and reduce the word count significantly by doing so.

Here is an example of how I have done it for the same journal on another paper:

https://gitlab.com/mechmotum/ski-jump-analysis-paper/-/blob/master/Makefile

Reviewer 2:

1. “We solved the base skateboard OCP to demonstrate that the model and optimization methodology produce ollies with realistic kinematics and kinetics.”

Refer to the section where we describe the criterion to conclude this.

2. “To demonstrate simultaneously solving for the control trajectories and optimizing the geometry parameters we present two single parameter optimizations: skateboards 3 and 4 which have their wheelbase and taillength optimized, respectively,”

Refer to figure

3. “skateboard 5 which demonstrates a multiple parameter optimization involving the simultaneous optimization of wheelbase, deck length, tail/nose inclination, truck height, and wheel radius.”

Refer to figure