Тёмный

Compliant Transmission Mechanism with Two Decoupled Degrees of Freedom 

The FACTs of Mechanical Design
Подписаться 40 тыс.
Просмотров 132 тыс.
50% 1

This video introduces a compliant mechanism that converts two rotational degrees of freedom (DOFs) into two translations with a specified transmission ratio. In other words, two handles can be rotated to drive an output stage such that it translates in two different directions according to a ratio that relates how much the output stage translates over how much the two input handles rotate. Moreover, the mechanism uses decoupling flexures so that each input handle can be rotated independently without appreciably affecting each other and so that the desired output motions of the stage are also independent and achieve negligible parasitic motion error. The mechanism was designed using Prof. Hopkins’ freedom and constraint topologies (FACT) synthesis approach.
To learn more about the compliant transmission mechanism of this video, you can read our journal paper published in Precision Engineering:
www.sciencedirect.com/science...
The part files for the mechanism can be downloaded from Thingiverse at this link:
www.thingiverse.com/thing:543...
Acknowledgements:
Special thanks to Dr. Robert Panas and Professor Martin Culpepper for helping to collect data and fund the effort at MIT.
Also, we acknowledge the following source:
commons.wikimedia.org/wiki/Fi...
upload.wikimedia.org/wikipedi...
U.S. Air Force photo/Airman 1st Class Laura Max., Public domain, via Wikimedia Commons
Donate to help support my channel:
If you’d like to make a one-time donation, you can use the following link:
PayPal.me/FACTsMechDesign
Thank you for your support! It is much appreciated and helps enable me to make more content.
Disclaimer:
Responsibility for the content of this video is my own. The University of California, Los Angeles is not involved with this channel nor does it endorse its content.

Опубликовано:

 

13 июл 2022

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 117   
@BRUXXUS
@BRUXXUS 2 года назад
Shockingly great explanation and demonstration! I also very much love that these are provided for 3D printing.
@alericjohansen6775
@alericjohansen6775 2 года назад
I'll be honest, a lot of what was said went over my head, especially at the part in the middle where it was putting up all the formulas and such that you used to determine it's degree of translation (i don't even know if im using that terminology right, lol) I come from practical knowledge of car mechanics. so when i saw the title that mentioned a transmission mechanism, i thought it had to do with actual car transmissions, and was VERY curious how this would fit in with that stuff. I'm SUPER glad i clicked on this as a result. i learned something new that still had to do with mechanics, just not with car mechanics, lol. ill have to watch this a few times to fully grasp exactly what im looking at, but its REALLY cool
@helmet098
@helmet098 2 года назад
I like your videos because the way you break it down, you really explain it in a way that anyone can understand.
@MadHatter123456
@MadHatter123456 2 года назад
Oh my. As a mechanical engineer, I can roughly imagine how much time, brain matter and effort you've put into this. Great work, truly amazing!!
@levoniust
@levoniust Год назад
Thank you for providing the STLs. for me there is no better way to learn and understand a new concept than to get my hands on it!
@andrewwatts1997
@andrewwatts1997 2 года назад
In the beginning of the video I thought ( this would be amazing for microscapy ) low and behold, 3 minutes later. Amazing work!!
@dieselphiend
@dieselphiend Год назад
It essentially has no 'moving pieces'. It's 'solid state', and yet, it has two degrees of freedom.
@capnthepeafarmer
@capnthepeafarmer 2 года назад
I love flexures in mechanical design! They are so useful and customizable people often overlook their use!
@senftube2460
@senftube2460 Год назад
as a german, I appreciate the design of the front
@MrSaemichlaus
@MrSaemichlaus 2 года назад
Excellent explanation, made sense all the way through.
@Trent-tr2nx
@Trent-tr2nx 2 года назад
Excellent and well summarized. When designing, did you also simulate/measure whether temperature could induce unwanted motion in the flexure?
@nos9784
@nos9784 2 года назад
Isn't that simply a question of "use stuff that has the same thermal expansion in all directions"? I guess rolled steel could break that- it gets anisotropic in rolling direction.
@JESUSCHRYSLER5512
@JESUSCHRYSLER5512 2 года назад
@@nos9784 THERE IS **NO** SUCH WORD AS ANISOTROPIC!!**
@nos9784
@nos9784 2 года назад
@@JESUSCHRYSLER5512 uhm... are you sure? After all, I just said it? If there wasn't before, there would now. anisotropic. There, I did it again, copied from wiktionary. Whats your point, and what is wrong with you?
@JESUSCHRYSLER5512
@JESUSCHRYSLER5512 2 года назад
@@nos9784 nothing is wrong with me, **KAREN!!** DERGON DERZHERLERABLE SPPLERZGERNOVLERS DERZHERLERABLESZHNOILBLWRZHERCOBSHERVER DERGON DERZHERLERABLE SPPLERZGERNOVLERS DARZHNARZHZARZHER.
@Shit_I_Missed.
@Shit_I_Missed. 2 года назад
@@JESUSCHRYSLER5512 an·i·so·trop·ic [anˌīsəˈträpik, ˌanˌīsəˈträpik] ADJECTIVE physics (of an object or substance) having a physical property that has a different value when measured in different directions. A simple example is wood, which is stronger along the grain than across it. (of a property or phenomenon) varying in magnitude according to the direction of measurement: "electron scattering is anisotropic"
@weirdsciencetv4999
@weirdsciencetv4999 2 года назад
This is absolutely brilliant
@robinmoussu
@robinmoussu 2 года назад
Thanks for sharing. It’s was very informative, and easy to understand.
@Legomasterguy
@Legomasterguy 2 года назад
Fantastic work!
@Shrike200
@Shrike200 2 года назад
At first I thought this wasn't serious, because the start just sounded like this: "The original machine has a base-plate of prefabulated amulite, surmounted by a malleable logarithmic casing in such a way that the two spurving bearings were in a direct line with the pentametric fan"
@DogeMultiverse
@DogeMultiverse 2 года назад
client: i want as much jank as possible. designer: say no more
@chadjones1266
@chadjones1266 2 года назад
Another great use.
@igorteller2371
@igorteller2371 Год назад
Amazing! Thank you a lot for sharing
@indian.techsupport
@indian.techsupport 11 месяцев назад
I love the felxures on the front
@mp6756
@mp6756 2 года назад
To avoid risking embarrassment my comment will be limited in the next few words. Very nicely done
@Ray-mr3gq
@Ray-mr3gq Год назад
Awesome awesome awesome mechanism.
@multiforc271
@multiforc271 2 года назад
WOW, i loved it, the mechanism was beautiful and interesting. designing the mechanisms are wonderful, assembling different piece of puzzles, different properties and characteristics to create a piece art, or better say, piece of engineering, that can be anything we want to be is the joy of life. I wished i could do my PhD in this field, but to be honest I have lost my self-confidence and mojo. By any chance, can you spare few minuted of your time to read my cv, and give me your opinion for the next stage of my life ??? i have recently finished my master.
@HuskyMachining
@HuskyMachining 2 года назад
this is so cool! This makes me want to go back to school and get a mechanical engineering degree
@quentinmangel2265
@quentinmangel2265 2 года назад
amazing
@sethbettwieser
@sethbettwieser 2 года назад
When you said how little it moved, I immediately thought of working with microscopes and, lo and behold, so it was designed for.
@fella9921
@fella9921 Год назад
I love this
@josepablolopezaguado6191
@josepablolopezaguado6191 2 года назад
Thanks so much for the amazing content, I think a video on the techniques and tips and tricks on how to actually manufacture and assemble flexure mechanisms would come in handy, do you use CMM machines to verify the assembly? Are dowel pins enough for part alignment?
@TheOriginalBubster
@TheOriginalBubster 2 года назад
Quite a interesting shape on that square
@planckstudios
@planckstudios 2 года назад
seeing the angles of the blades on a flexure bearing intersect w/ the body's rotational axis - can that be used as a generic marker for identifying movement/function in these complicated flexures? if flat multiple flexures converge, follow the lines, then twist body along perpendicular axis at the meeting point?
@ced6354
@ced6354 2 года назад
Brillant
@leeknivek
@leeknivek 2 года назад
perfect, the precision swastika, just what the world had been waiting for
@DanielReetz
@DanielReetz 2 года назад
These are so cool. Are you cutting them via waterjet or wire EDM?
@Nets-nutsBr
@Nets-nutsBr 2 года назад
I understood. A quick question: how did you have the insight: "yeah let me make this super duper mechanism" ? Would mind telll us how such great idea was born? Thanks!
@xaytana
@xaytana 2 года назад
I want to see this miniaturized, say a 25mm cube, and made as a one-piece part, with a modified pitch so that movement isn't microscopic, align the rotational axes with the cubes center, and give the linear portion more throw. There could be some interesting applications for this throughout all scales.
@mildsauce5019
@mildsauce5019 2 года назад
but do you have a product which people would pay for? if so, what is it?
@ker6349
@ker6349 2 года назад
@@mildsauce5019 get out of here with that hypercapitalist nonsense.
@SoulAir
@SoulAir 2 года назад
@@mildsauce5019 Hot sauce
@darkracer1252
@darkracer1252 Год назад
what a compliant mechanism. i have seen solid hardwood tables more compliant then this thing.
@officalGlitchlab
@officalGlitchlab 2 года назад
I feel smart now. Joking aside I understood everything he said and actually found it cool.
@prj0l1
@prj0l1 16 дней назад
строение таких штук максимально контринтуитивно, но благодаря им можно делать приборы высокой точности
@samwpatterson
@samwpatterson 2 года назад
"Now is the story of a family who lost everything.." ❤️
@mully006
@mully006 2 года назад
What is the sensitivity of this mechanism to thermal expansion?
@mitchellsteindler
@mitchellsteindler 2 года назад
Infinity 🤣🤣🤣
@kitewinds663
@kitewinds663 2 года назад
Super cool! Thanks for sharing. I tried to follow your link to Thingiverse but unfortunately this do not work. I can only see two designs at the landing page, and none of those two is the one from this video. If you ever consider sharing the geometry, please post a link, as I would love to print a version of this for my usb-microscope :)
@Jkauppa
@Jkauppa 2 года назад
two discs on their axles, one running side ways on the other, 90 degree angle, its a cvt transmission with the other disc being the clutch
@nickjohnson410
@nickjohnson410 2 года назад
This is awesome I don't understand any of the math... But it's still awesome
@Unmannedair
@Unmannedair 2 года назад
Wow, this would be great for aiming lasers.
@satibel
@satibel 11 месяцев назад
now if you fix a laser on it and add a lens, use the mechanism to move a lens relative to the laser, or constrain the front of the laser with the moving plate and the back with the ground, you might be able to get extremely precise cuts. the other option would be to simply have the piece you wanna cut on the plate.
@canylmaz7185
@canylmaz7185 2 года назад
Love 🥰
@travisallen5716
@travisallen5716 2 года назад
I followed the link to the thingiverse files but the files from this video don't seem to be there
@ternovoygarri
@ternovoygarri 2 года назад
It resembles apparently some tibetan sign of sun... 😁 Great work!!!
@Mr.YExplains
@Mr.YExplains 11 месяцев назад
Did the 3D print. Thanks,
@EternalDog
@EternalDog 2 года назад
But where does the Retro Encabulator fit? Does it have hydrocoptic marzelveins fitted to ambaphasiant lunar wainshafts to prevent side fumbling?
@Caramelldanson
@Caramelldanson 2 года назад
When in use as a microscope stage, how is the target flexion maintained?
@phpn99
@phpn99 2 года назад
Interesting, but that can easily be done with a handful of racks and pinions or worm screws. Well ; maybe at a large scale, but likely not at a microscopic scale.
@steveharrigan7811
@steveharrigan7811 2 года назад
Could this be used to set up the intonation on a guitar?
@meinleben2132
@meinleben2132 2 года назад
Our future is physically solid state, that's so very cool.
@satin227
@satin227 2 года назад
This reminds me of G-Force sensors in smartphones and other electronics
@danko6582
@danko6582 Год назад
Does the stage twist, though?
@jameshopkins21
@jameshopkins21 2 года назад
This is an amazing mechanism! Was this designed to repair or create microchip circuitry? One could also create nano art and sign it with a nano-sized signature for display in a nano gallery for mega-bucks!
@noobulon4334
@noobulon4334 2 года назад
Its intended to be a finely adjustable microscope stage
@hashbrown777
@hashbrown777 Год назад
I'd love to see the various 3D printer channels give those files a crack, and also design a way to have those inputs not move when not touched (id est not flex back once you have made an adjustment and just want to look down the microscope and maybe write some notes)
@redpug5042
@redpug5042 2 года назад
maybe by using a screw, you could move those handles (replaced with gears) and then a set of bevel gears to turn 90 degrees to get easy to use handles that keep their positions
@henriksundt7148
@henriksundt7148 Год назад
If you introduce gears, you could just as well skip the rest of the mechanism and translate the centre stage directly by toothed bars.
@leozendo3500
@leozendo3500 2 года назад
cool but why does piezo ceramic not work?
@JinKee
@JinKee Год назад
Is there any material that is 100% immune to work hardening and fatigue?
@notconnected3815
@notconnected3815 Год назад
Wow, this is genius! Dis some one try to 3D-Print it?
@xspager
@xspager 2 года назад
Interesting shape you got there would be terrible if it looked like something BAD
@geraldozambrinjunior4667
@geraldozambrinjunior4667 2 года назад
👍👍👍👍💯
@dimitar4y
@dimitar4y Год назад
I can't imagine the math required to do this. Imagine someone trying to design this 30-40 years ago. Headboom.
@raymondelder5004
@raymondelder5004 2 года назад
it would be sweet if somebody 3d printed this.
@johnjensen2217
@johnjensen2217 2 года назад
Very cool device but I have to ask what advantage does this have over a two axis stage moved by manual screw drives geared down to provide fine motion?
@hamjudo
@hamjudo 2 года назад
This has much less backlash.
@d0tline468
@d0tline468 2 года назад
none, this is a precision movement controller that not only needs force to be constantly applied to remain at a given position and will rapidly lose precision as the spring temper wears unevenly between the two with every movement. The only real use case for very complicated compliant mechanisms is for products too microscopic to physically produce that outcome in any other way.
@jakubhostinsky4482
@jakubhostinsky4482 Год назад
Fancy Etch A Sketch :-D
@konradtabbi5875
@konradtabbi5875 2 года назад
Nice mechanism but why does it need to look like a censoried 1944 sign? Ps:i'm sorry if you didn't noticed it.
@321750101
@321750101 2 года назад
What happens if we invert the input direction, would small micron sized motions be blown up by the same ratio to generate course motion in the handles? Can some analogous compliant mechanism be designed for efficient energy conversion from finer resolution scales to larger ones
@tHaH4x0r
@tHaH4x0r 2 года назад
Sure, that works. But keep in mind that this is not 'energy conversion' or 'power conversion'. The power that goes into a passive transmission is equal to the power that comes out (minus losses). That means that although you have as an input tiny motions, you will need very large forces to achieve large motions with small forces on the output.
@321750101
@321750101 2 года назад
@@tHaH4x0r right! meant more like motion patterning. Imagining some encoded information getting translated upwards in scale with a use of some "amp", a weird form of compliant data storage.. kinda like a vinyl record player or RNA polymerase going through DNA
@DogeMultiverse
@DogeMultiverse 2 года назад
@@321750101 try atomic force microscopes
@321750101
@321750101 2 года назад
@@DogeMultiverse hahahah pretty much
@demetriusmichael
@demetriusmichael 2 года назад
I’ve seen a lot of large turn into small movement. Are there any examples of the reverse?
@SoulAir
@SoulAir 2 года назад
Its aluminum, so how are you going to have the strength to bend it like that?
@demetriusmichael
@demetriusmichael 2 года назад
@@SoulAir referring to the RU-vid channel / complaint mechanisms in general, not to this specifically.
@SoulAir
@SoulAir 2 года назад
@@demetriusmichael Gotcha
@ramonhamm3885
@ramonhamm3885 Год назад
Can you add the 3rd dimension of movement?
@TheFACTsofMechanicalDesign
@TheFACTsofMechanicalDesign Год назад
Yes, you could add any DOF with any transmission you'd like using the FACT theory to design it.
@TheStuartstardust
@TheStuartstardust 2 года назад
7:34 - why the big outlier? 🤔 My brain does not like it 🤓😄
@Graham_Wideman
@Graham_Wideman 2 года назад
Yes, I saw that too. It's off by about 20% of the entire range! There must be some interesting story about that. And why were the measurements taken at such irregular intervals? Not linear, but not log either. And the outlier point was conspicuously close on the X axis to another point that had a Y value that was spot on. Very odd. Maybe the mechanism had some sticking point or buckling point.
@gmonte00
@gmonte00 2 года назад
This is so hard
@jmssun
@jmssun 7 месяцев назад
2:39 “Show me your transmission capabilities”
@roxasparks
@roxasparks 2 года назад
I understand this well... but boi dose it hurt my head.
@21doctor54
@21doctor54 11 месяцев назад
this is all well and good. i noticed a slight minor flaw in the design. your output looks like a swastika...
@holski77
@holski77 2 года назад
I watched this video and now i know im a dummy head
@MrGmanFreeman
@MrGmanFreeman Год назад
wow a sideways etch-a-sketch
@kevindomenechaliaga8085
@kevindomenechaliaga8085 Год назад
¿What?
@ijuvatar
@ijuvatar 2 года назад
my brain cant handle this mechanism i am sorry
@aidshusten240
@aidshusten240 6 месяцев назад
like the sun symbol
@user-tk2jy8xr8b
@user-tk2jy8xr8b 11 месяцев назад
Does the mechanism include a swastika on purpose?
@thetruthexperiment
@thetruthexperiment 2 года назад
Yeah well, that’s all well and good accept it looks like a swastika. Better start over.
@AuthoritativeBanana
@AuthoritativeBanana Год назад
BLACK hair
@TheFACTsofMechanicalDesign
@TheFACTsofMechanicalDesign Год назад
Yes. Hair color is strongly correlated with hair thickness.
@thatGUYbehindthemask
@thatGUYbehindthemask 2 года назад
but you cant put this transmission in a car...
@a51mj12
@a51mj12 Год назад
Is that supposed to be impressive...?
@leaettahyer9175
@leaettahyer9175 2 года назад
Throw that in the waste bin and buy a Tesla
@montagray3761
@montagray3761 2 года назад
Seems utterly useless and prone to hyper metal fatigue. Pointless
@Graham_Wideman
@Graham_Wideman 2 года назад
How it seems to you may be telling us more about you than the mechanism!
Далее
This Expanding Mechanism is Crazy Clever
9:06
Просмотров 1,4 млн
Gearless Magnet Bike
17:57
Просмотров 6 млн
Why Machines That Bend Are Better
12:52
Просмотров 12 млн
Flexure Joints for Large Range of Motion
5:24
Просмотров 92 тыс.
How to achieve nanometer precision in space?
11:07
Просмотров 711 тыс.
I Might Have Invented Something New...
25:07
Просмотров 1,9 млн
This Car Travels Farther Than You Push It
13:42
Просмотров 2,8 млн
Wirtz pumps are really clever
12:05
Просмотров 13 млн