Configuration Space and Linkage Defects

The design of linkages presents many challenges.  Most notably the nonlinearity of the design space. However, another challenge is created by the presence of defects in linkage designs. The regularly studied linkage defects are named order, branch, and circuit. See Balli and Chand. An effective method to eliminate linkage designs that possess branch and circuit defects […]

Synthesis of Six-bars

The six-bar linkage is the next simplest 1-DOF planar mechanism after the four-bar. However, designing these mechanisms presents a challenging set of synthesis equations. For example, a four-bar motion generator is determined by a polynomial system that has 4 isolated roots (of which one is the origin), where each root represents a potential design. On […]

Path Generators

Designing a path generating linkage means designing a linkage to guide a point path in some particular manner.  We specifically have worked on designing six-bars.  Much work has been completed on four-bar path generators, but it wasn’t until 1992 that Wampler et al. [1] found a complete solution set of 4,326 to the general 9-point […]

Creative Design

A massive piece of kinetic artwork was designed to be installed on wall. A simulation of this artwork appears below.   For creative design inquiries, fill the contact form below:

Shape Changing Parabolic Reflector

Here is a bit from my undergraduate honors thesis work at the University of Dayton. The objective was to design a mechanically adaptable light reflector that moves five panels through five parabolic design profiles. The video below also shows designs for a shape-changing seat, cam, and face. M. Plecnik, Design of a Shape-Changing Rigid-Body Parabolic […]

Rotary Weaver

A hydraulic hose manufacturer in the US approached UC Irvine in order to design a linkage for their rotary weaver equipment. They were trying to equip their machines so that they could change out the current 2 over 2 braid pattern into a 3 over 3 braid pattern. They wanted to avoid the use of […]

Rice Transplanter

A novel six-bar linkage was designed to move transplant rice seedlings. The idea is to create a manual device that eliminates very labor intensive hand transplantation.  For more information on this subject click here. The next phases of this project are to design and test end effector geometry and feed indexing. This work is being completed […]

Wing Mechanism

A wing mechanism was designed to reproduce a complex accelerative flapping gait from a single constant RPM motor. The flapping gate was deciphered from data obtained by Tobalske and Dial, 1996, of black-billed magpies. The synthesis process begins by specifying a 4R spatial serial chain that resembles a magpie’s anatomy. Moving the spatial chain through […]

Six-bar Suspension

For Long Travel A design algorithm was created that synthesizes suspension linkages that feature the Watt I six-bar mechanism. Watt I mechanisms offer motion capabilities beyond four-bar double wishbone designs, however their design in not intuitive so we depend on the mathematics to find linkage designs for us. The algorithm was applied to the design […]