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.
Our paper Numerical Synthesis of Six-bar Linkages for Mechanical Computation provides the mathematical theory that underlies the synthesis of a six-bar linkage with an input-output relationship that approximates a specified function. This describes how the Stephenson III six-bar linkage that sets the elevation for a ballistic trajectory was designed.
This poster was prepared as a gift to Ken Waldron on his 70th birthday and given to him at a conference organized in his honor. Anuj Taneja generated the SolidWorks model in 2006 from the original drawings of the Adaptive Suspension Vehicle. I recently found the electronic files and Kaustubh Sonawale generated the four-view drawing. The ASV is an important feat of engineering and the stories shared by those who worked on it were wonderful.
My 1990 book is now on-line as an iBook. It is available as of March 31, 2013. This 2013 version has corrections to errors and language, and includes a glossary and animations of various linkage systems. I hope you like it.
You can see it at the link: Introduction to Theoretical Kinematics.
This is a robotic gripper designed by Andrea Carli and Kaustubh Sonawale. It uses a six-bar linkage for the primary movement and a slider adjustment to provide a gripping fine movement.
Here is the schedule for the IDETC/NSF Workshop on 21st Century Kinematics:
The presenters for the 2012 IDETC/NSF Workshop on 21st Century Kinematics, August 11-12, 2012, Chicago, Il, have gathered background information into this book published by Springer. It is a guided compilation of work by the presenters found in their recent papers and books. We are grateful to ASME, IJRR, Robotica and Springer for the permission to reprint these excerpts.
Recently, I became aware of the overall poor quality of the articles on machines in Wikipedia, and I have spent quite a bit of time revising these articles over the past month. I hope my contributions are an improvement. Please take a look:
- Machine (mechanical)
- Mechanical system
- Linkage (mechanical)
- Screw axis
- Burmester’s theory
- Four-bar linkage
- Mechanism (engineering)
- Instantaneous center of rotation
- Screw theory
- Dual quaternion
- Mechanical advantage
- Overconstrained mechanism
- Kinematic pair
- Virtual work
As you may know anyone may edit Wikipedia, and it is intended to allow user communities to maintain the quality of particular sets articles. It is important that we take this opportunity because Wikipedia is an important resource to our students.