HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
DNTV
Gadget Freak

Gadget Freak Case #258: Memory Wire Muscles Actuate Biped

Marin Davide created a prototype of a moving biped using a shape memory alloy that works like a real muscle to move a cardboard leg.
Click here for build instructions, BOMs, and more.
7/11/2014 | 8 comments
View Comments: Newest First|Oldest First|Threaded View
yohann164
User Rank
Iron
Re: How's it work?
yohann164   9/3/2014 9:05:32 AM
NO RATINGS
Eh oui! De C'est très très Captivante, et la création est vraiement réussie.

Unai40
User Rank
Iron
Re: How's it work?
Unai40   8/18/2014 6:53:14 AM
NO RATINGS
Très très impressionnant! J'aime bien ;)

Philippe64200
User Rank
Iron
Re: How's it work?
Philippe64200   8/6/2014 3:21:05 AM
NO RATINGS
Très impressionnant! 

Amclaussen
User Rank
Platinum
Re: How's it work?
Amclaussen   8/5/2014 4:20:53 PM
NO RATINGS
Charles:   It is a change in shape when the alloy undergoes a temperature change; they are called "SMA's" or Shape Memory Alloys for that. A very concise and short explanation can be realized if you understand that the alloy change from say, austenite to martensite and viceversa. Both are the same metal, but its microcristalline structure is different. Most known and common SMA's are based on Nickel-Titanium alloys or "Nitinols".  Visualize a change from Body-Centered Cubic cristal structure to Face-Centered Cubic structure, and this is the reason for the change in geometry. For more info look at "SMA" and "Cristal Structures" at Wikipedia for a more complete explanation.

Several years ago I became very interested in Shape Memory Alloys, because I have a young relative that was born without his right arm and hand, so that I thought to mimic muscle action in a very direct way by using some SMA artificial "muscles". But the still high cost of these alloys, and the very high electrical current consumption to heat them quickly, made me aware of the practical difficulties and limitations.  Later on, I read a report about a systems conference where an engineer from an aerospace firm revealed that an F-16 Fighter jet needed several times the energy to actuate the control surfaces based on SMA actuators than with the conventional ones...

Used on short distances, SMA actuators can develop quite a force, but most uses tend to employ them as a pilot to control another larger conventional actuator, like a small pilot valve controlling a larger pneumatic or hydraulic valve.  Amclaussen.

 

 

thierry1313
User Rank
Iron
Re: How's it work?
thierry1313   7/30/2014 9:28:43 AM
NO RATINGS
Très captivante. Merci pour la vidéo! ;)

marc13
User Rank
Iron
Re: How's it work?
marc13   7/30/2014 8:59:30 AM
NO RATINGS
Une belle création!! Bravo!

marc13
User Rank
Iron
Re: How's it work?
marc13   7/30/2014 8:59:30 AM
NO RATINGS
Une belle création! Bravo!

Charles Murray
User Rank
Blogger
How's it work?
Charles Murray   7/11/2014 8:07:44 PM
NO RATINGS
Cool. How's this work? Application of current causes mechanical stress?

Partner Zone
Related Videos
Gadget Freak
Gadget Freak Case # 265: Propane ...
This project is an experiment in generating supersonic ...
Gadget Freak Case #267: What Happens ...
The Arduino is great for connecting with hardware but has a ...
A Lesson In Lithium-Ion Volatility
During a teardown of the iPad Air and Microsoft Surface Pro ...
Gadget Freak Case #266: The Window Watcher
The Window Watcher stops the burglar before he does damage ...
Gadget Freak Case # 264: Drink Delivery ...
The DDV-IP is an inverted pendulum driving machine. The ...
Gadget Freak Case #263: Midi Key-tar
Adam Berger hacked a computer keyboard into a mini key-tar ...
Gadget Freak Case #262: Boat Lift ...
Dick Bipes couldn't find a boat lift remote with the specs ...
Gadget Freak Case #261: Dr. Seuss ...
Colorado State University students have created a Dr. Seuss ...
Gadget Freak Case #260: Arduino Solar ...
This solar charge controller, which is placed between a ...
Gadget Freak Case #259: Gag Bomb ...
This Hollywood movie-style gag bomb doubles as an alarm ...
Gadget Freak Case #257: TempBug -- ...
You can put this thermometer anywhere with WiFi and collect ...
Design News Webinar Series
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service