Mechanical Design

Mechanical Design 101

Mechanical Design Educational Resource

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Rectilinear eight-bar suspension

17 April, 2014 (03:17) | Linkage Animations | By: Prof. McCarthy

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This is a design concept for a rectilinear eight-bar suspension. It does not manage body roll but it does provide compact large travel.

Rectilinear eight-bar linkage

9 April, 2014 (19:57) | Linkage Animations | By: Prof. McCarthy

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This animation was prepared by Yang Liu for a linkage designed by Kaustubh Sonawale. The eight-bar linkage guides the platform in the approximation to rectilinear motion.

Six-bar linkage with rectilinear moving link

20 January, 2014 (23:15) | Linkage Animations | By: Prof. McCarthy

This is an animation of a Watt I six-bar linkage with a translating link that does not rotate (select the video to begin the animation). This is obtained using GeoGebra to execute a construction described by E. A. Dijksman in his book Motion Geometry of Mechanisms.

UCI’s 2013 Fall Design Review

8 January, 2014 (16:05) | Student Projects | By: Prof. McCarthy

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Over 80 student teams from across the Samueli School of Engineering presented their senior project plans for 2013-2014. Follow their progress at the Winter Design Review in March 2014.

KOCE reports on the California Challenge

28 October, 2013 (18:55) | Automotive Information, Student Projects | By: Prof. McCarthy

This video is a news report on the UCI California Challenge:  KOCE video.

“Kinematics and Polynomials” Available on a Mac

23 October, 2013 (18:11) | Lecture Notes | By: Prof. McCarthy

Until yesterday, my iBooks Introduction to Theoretical Kinematics and Kinematics and Polynomials were available only on the iPad, but now with OSX Mavericks they are available on any Mac. Please give it a try. You can download a sample at this link: Kinematics and Polynomials sample.

Preparing for the California Challenge

1 October, 2013 (14:35) | Automotive Information, Student Projects | By: Prof. McCarthy

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Some of the cars being prepared for the California Challenge on Saturday, October 5 at the Orange County Great Park.

Kinematics and Polynomials available for pre-order

28 September, 2013 (06:01) | Lecture Notes | By: Prof. McCarthy

My iBook Kinematics and Polynomials is now available for preorder on iTunes. You can see a preview at this link. At 75MB it is considered a relatively large download.

The goal is a presentation of the analysis and synthesis of kinematic systems that relies on the theory of polynomials. I wanted to include some Mathematica code by means of video screen capture and some animations. The iBook format makes this convenient, however the size of the document increases rapidly with each video.

Currently, it can only be seen on an iPad, but this is supposed to change soon, because the OSX Mavericks operation system is to include an iBooks application.

Kinematics and Polynomials in Brief to be released soon

20 September, 2013 (19:50) | Lecture Notes | By: Prof. McCarthy

Kinematics and Polynomials

Kinematics and Polynomials

My latest attempt at ePublishing is an iBook called Kinematics and Polynomials in Brief. It will be available on October 1, 2013. It is about 50 pages and includes six short videos, which unfortunately add up to about 75MB. This is about three times the size of Introduction to Theoretical Kinematics, though  about half the number of pages. It is also about six times what is recommended for a book download.

The extra MB arise from short videos of Mathematica algorithms that perform example calculations presented in the text. Actually, most of the videos show me silently executing the Mathematica commands, but I do talk in two of them, which significantly increases their size.  If you are interested in the Mathematica files, please contact me.

Mechanical characters

10 August, 2013 (15:21) | Linkage Animations, Robotics Information | By: Prof. McCarthy

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Disney Research guides two degree-of-freedom open chains using the coupler curve of a geared five-bar linkage to obtain geared seven-bar and nine-bar linkages, which they use to move the front and rear legs of their Cyber Tiger. By connecting the driving gears of the four legs, they obtain a one degree-of-freedom system that animates the Cyber Tiger.

The computational design system uses an optimization routine to adjust the coupler curve of the five-bar linkage to approximate a given curve in order to guide the system in a desired movement. The results are terrific, and look a lot like the mechanical toys of the past. Select this link for more information.