Hi all, I am working on an small project in turbocharger. In that, I want to do an mechanism simulation for its VGT-Cartridge(Variable geometry turbine). I am using CREO.
Please check the images.https://imgur.com/a/6lrybzm
In that, the red part(Called as outer ring) is free to rotate on its center axis(considering it as an pin).
The red part has some slots all around it. In those slots, a component will be assembled- Guide Pins.
Shown in Blue colour. This guide pins will be centered in the marked holes. With having its center there, it will be assembled with tangency constraint to the slots in red part. The side surfaces of slots will be tangent to the guide pin.. Assembly is shown in the image.
This assembly enables the guide pin to rotate the outer ring(red part) with its tangent constraint.
I am trying to do this in mechanism, I am not able to give this tangency constraint . I have tried all the connection types(pin, Cylinder etc).
Please let me know if there is any way.
I couldn't explain this assembly correctly in this post. If needed please dm me. I will send the animation video.
Yesterday I posted here about adding a tangency callout on a drawing, kind of like they have in the CSW tests. Thanks to u/mile14 and u/DadBod_NoKids I figured out a solution!
The icon is not actually included in the SW symbol library and has to be manually coded. If you want to add it to your program:
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Go to C:\ProgramData\SOLIDWORKS\SOLIDWORKS 20xx\lang\english (the address may vary depending on your install);
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Make a backup of "gtol.sym" and open it with notepad;
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Scroll down to the bottom and paste the following:
;;
#Custom Symbols, Custom Symbols
*Tangency, Tangency relation symbol
A,CIRCLE .35,.35,.25
A,LINE .2,.9,.9,.2
;;
DO INCLUDE THE SEMICOLONS! The name "Custom Symbols" may be changed if you'd like, It is how the category will be named inside the program. Same goes for the "Tangency". The stuff written next to the names is the description.
Funnily enough, I didn't manage to make the circle and the line actually touch, but this is only visible when zoomed in.
To add the symbol to a drawing, use the "balloon tool" > "More properties" > "Add symbol". If a "1" shows up in front of the symbol, set the "balloon text" to "text" and leave it blank.
If you want to create your own custom symbols (or try to make the one I made actually tangent), I highly recommend reading this tutorial:
https://www.cadimensions.com/blog/creating-custom-symbols-solidworks/
If you have any problems, contact me and I will try to help out as best as I can!
https://preview.redd.it/ows53kp3e7e71.png?width=158&format=png&auto=webp&s=14d7b19b4955ac0671d63743698fde3d2f42e9bb
(And the strong version of EMH)
Assumptions:
- There is one intergalactic market that contains everything of value
- The market includes a risk-free asset (though I don't believe this is truly a requirement for this conclusion)
- I can buy an infinitesimal amount of anything and everything in the market
- Everyone knows everything about everything in the market, and they've traded with such liquidity that the value of everything in the market has been determined exactly
- The market portfolio is the sum of everything in the market
- We're in a frictionless vacuum, and cows are spherical
Then, the market portfolio is the best mean/variance portfolio: if a higher Sharpe ratio portfolio existed, then everyone would recognize this and use it, changing the prices in the market, making the portfolio worse than or equivalent to the market portfolio.
And if I wanted to invest in the market portfolio, I would buy a fractional share of the market, the components of which would then be weighted by their value in the market (their market capitalization)
Is that all accurate? Are there points that should be changed?
Trying to make a sweep with a radius that decreases at a constant rate aka a spiral. I have an existing arc though that I'm trying to have the resulting spiral be tangent to. Anyone familiar with the math to get this to work? I need to work out the diameter of the guide circle, the center point of the guide circle and the start angle. Unless someone knows of a different way to define this. A style spline perhap?
Title.
I'm new to surface modeling and I've been following a tutorial using SW 2020, but in the tutorial it does not mention anything about changing tangency directions. For some reason I cannot explain, some splines that I try to make tangent to surface edges are fixed to go in the direction I do not want them to. I do not have an option to "Reverse Tangency Direction" when I right click on it. Please help!
Find an equation of the straight line tangent to the curve y = e^x and passing through the origin
Please show me your work in math notation. Thank you
Hey guys! I am new to the group, but I would love to hear your opinion about the magic system in my project. I would also be very grateful for your suggestion and constructive criticism. I am not a native English speaker, so please don't be too harsh about the grammatical side of this post.
***Setting:***
The setting of an adventure story in my project is the equivalent to the transition period between ancient and medieval times in their religious and cultural aspects.
(Basically, the decay of empires, the clash of monotheism and polytheism, relations among theology, philosophy and science, conflict between moral code in the law and institutionalised slavery, etc., etc.).
In terms of an environmental worldbuilding or in my case worlds-building, the story is set on three different planets/"Spheres", between which the teleportation, called "Spherportation" is possible. However, it can only happen during the conjunction of two worlds and only between two closest points: "Zenith" and "Antizenith".Here, I wanted to kinda reverse this common fantasy trope, where the conjuctions of planets happen once per millennium and they always cause the end of the world :D
In "Triworld" they occur every few days and they are a key element of the trade routes. Conjunctions happen so frequently due to very small orbits. Think, Trappist-1. Naturally, the most significant cities were founded near the Zenith and Anti-zenith points.
***Magic:***
Now about the Tangency, one of my two (but Spherportation can be counted as third one) magic systems.Its core principle can be said in one sentence. As long as your hands are in contact with something and you are aware of it, you can manipulate it. Minerals, fluids, cosmic forces- here your imagination and knowledge are one of the limits.
Example: You are holding the glass bottle. Thus, you can control any glass in your sight. Bend it or tear it down into small sharp pieces that will injure your enemy. This however costs much magic energy called "Arlysium" which is conduct throught iron in human blood.Magic itself is as strong as your muscles or even weaker at the beginning. Going back to glass- magic energy need to lift or shatter it with Tangency is equal or bigger to the energy you would have to use to lift it or break it with you own hands.
Basic Laws:
- **You can control either substances or "essences" that you ar
Im working on a question looking at utility maximization, which I guess is a calculus optimization problem.
Typically, I've worked on problems which are just given as a Cobb-douglas utility.
Im working to solve Marginal utilities, which is just partial derivatives. Im a bit lost if I'm doing this correctly. The whole subject to a function part is throwing me off. I might just be doing the math incorrectly.
I have all the answers, but I'm trying to see if I can work these out myself.
https://reddit.com/link/i6fseh/video/ar5oxglfoxf51/player
I've been working on a program to simulate keplerian orbits, which are all conic sections, and one of the problems I'm coming across is trying to find the velocity vector of the satellite given the keplerian elements of the orbit, the three important ones for this problem are the eccentricity, semi-major axis, and true anomaly (the angle I referred to in the title.) I know the magnitude of the velocity from the vis-visa equation, but I still need the direction in the form of a unit vector, which will be tangent to the conic section at the point the satellite is at. I just don't know a formula for finding it.
The strangest thing that you were probably always told is that love can save you. That Love is the answer. Well yeah, sure it is, but the problem is nobody ever really told me what love is and what it means to give it. Love hurts. Love pushes back. Love is never easy. I remember easy. Easy was nice. Easy was loud. Easy dies fast. Love is though. Love is quiet. Love is a whisper that makes you yell to the world I’ll do anything for it. Man...the dumbest but realest shit I’ve ever heard was, “once you can love yourself, you can love others.”...I’m not a Kumbaya sum’ bitch by any means but love is so good. So powerful. It’s hard to give it. I think sometimes it’s even harder to receive it. But once you realize that it’s all we’ve really got...The only real power we’ve ever had...well it makes me wanna scream, “kumbaya mother fuckers!!! I love y’all and I wish you the best!!! I know we’re absolute strangers and my anecdote may not resonate with you but fuck it I believe in you anyway! Cheers to another fuckin’ day in paradise and may it be forevermore, more beautiful tomorrow. Much love. Word to your mom.”
I am making a drawing for a part which has 2 cylinders with their axis perpendicular to each other. I have a section view shown as in this link:
https://imgur.com/a/QFto6
What's the correct callout to the tangency in this feature?
Thanks
(Cross post from CAD)
I have found information on how Bezier curves are the splines used by creo here https://community.ptc.com/t5/PTC-Mathcad-Questions/ProE-Spline-Equation/td-p/279104/page/2
Now I am curious how creo chooses the two internal control points for a spline when I impose the tangency requirement to both ends? The curves always turn out smooth, and I would like to replicate something like this in a bit of code I am building.
Imposing tangency to the end points is easy. The question becomes, what length should I choose for the first and last controling lines to get a minimum strain energy curve, similar to how a drafting spline would work?
Story: I was recently reminded that when I took Prof. Robert Shiller's Financial Markets course on Coursera (it's free) I was quite surprised that he presented personal portfolio management as somewhat of a 'solved problem', saying that the tangency portfolio maximizes expected returns divided by risk (represented by standard deviation as you'll never account for every risk in the real world). So of course I set out to calculate one for the current situation, and failed previously. Fortunately I found an excel add-on that will calculate one for you here (careful, the macro will only let you open and run it once).
Data: I grabbed data for the following ETFs that I can trade commission free, that I felt would give a representative sample of assets with as little correlation as possible:
BND Vanguard Total Bond Market Index Fund ETF Shares - Intermediate-Term Bond - 0.08% ER
TIP iShares TIPS Bond ETF - Inflation-Protected Bond - 0.20% ER
VNQ Vanguard REIT Index Fund ETF Shares - Real Estate - 0.10% ER
VEU Vanguard FTSE All-World ex-US Index Fund ETF Shares - Foreign Large Blend - 0.15% ER
IVV iShares Core S&P 500 ETF - Large Blend - 0.07% ER
VB Vanguard Small-Cap Index Fund ETF Shares - Small Blend - 0.09% ER
- I wanted to include DBC here for commodities, but I don't want a 0.85% Expense Ratio in my portfolio
Problem: BND and VEU only go back to 2007. I believe that since federal interest rates have been kept so low during this period, that my tangency portfolio will over-value bonds. It doesn't have an example of rising interest rates to show the kind of risk that BND carries, especially right now when the fed has said that they'll raise rates in the next few years. Others don't go back much farther. I switched to iShares AGG instead of BND to get back to 2003, but I'd still like much more data. Can I somehow get the historical prices for the underlying indexes, or even theoretical prices before they existed?
My tangency portfolio: http://i.imgur.com/Ctyivoe.jpg
I used monthly data. The left axis is expected return, higher is better; the bottom axis is standard deviation, our approximation of risk in the portfolio. We want to maximize
... keep reading on reddit ➡Title.
Rightclick menu items seem to change a bit arbitrarily.
I'm doing a math lesson on Friday at my kids' school, and it would help to know why we use the same word to refer both to a line barely touching a curve and for the ratio of sin/cos. Thanks.
I felt like everyone around me talks about advanced surfacing, but I never really understood how to do it properly and there are a lot of varying opinions. This guy from the DiMonte Group has posted some really amazing videos that cover best practices in a really short and concise manner! He definitely deserves some love from us.
Hope you Solidworks people enjoy this stuff as much as I did!
