Halloween Display 2019

This video shows how the linkage systems moving spooky decorations designed by my six student teams were combined into a Halloween display.

More Halloween Linkage Designs

The Halloween decorations designed by project teams 4, 5 and 6 can be seen in the video

Halloween Design Project

Students in my MAE 245 Advanced Kinematic Synthesis class have designed Halloween decorations using a four-bar linkage by itself or in combination with a parallelogram or pantograph linkage. You can see the work of teams 1, 2 and 3 in the video:

Walker Group 6

Mechanical Walker Project Animations: Spring 2019

Here are the solid models of some of the walkers designed by UC Irvine students in my Spring 2019 course MAE 183 Kinematic Synthesis of Mechanisms.

Walker Group 1

Walker Group 2

Walker Group 4

Walker Group 6

Walker Group 8

Walker Group 9

Walker Group 10

Leg Mechanism for a Mechanical Walker

This is an animation of the leg mechanism for a mechanical walker designed using function generators to drive the hip and knee joints. A second parallelogram linkage is used to construct a translating leg that allows placement of the foot trajectory where ever the designer chooses.

Three Position Synthesis 2

Construction for Three-Position Synthesis of a Four-Bar Linkage

The graphical construction of a four-bar function generator that coordinates three input and three output angles is presented in the video below. It is possible to coordinate as many as five input-output angles, but this requires numerical calculations using software like our MechGen FG iOS application.

More notes on Kinematic Synthesis    Also see my book Kinematic Synthesis of Mechanisms: a project based approach

MechGen on iPhone

Five Position Synthesis of Four-bar Function Generators

Our MechGen FG iOS application provides five position synthesis for four-bar linkages. A Demo of the iPad version is provided below. It is also available on the iPhone.

Construction for Two-Position Synthesis of a Four-Bar Linkage

The graphical construction of a four-bar linkage that coordinates two positions of an input crank with two positions of an output crank is presented in this video using Geogebra.

A linkage that coordinates the values of input and output angles is called a function generator. It is possible to design a four-bar linkage to coordinate as many as five input and output angles. However, this requires numerical calculations using software such as our MechGen FG iOS application.

More notes on Kinematic Synthesis    Also see my book Kinematic Synthesis of Mechanisms: a project based approach

Graphical Two Position Synthesis of a Four-bar linkage Function Generator.

Construction of a Skew Pantograph Leg Mechanism

This video adds a skew pantograph to a four-bar linkage in order to reorient and change the size of the coupler curve. The result is a six-bar leg mechanism with a foot trajectory that is a scaled version of the original coupler curve.

Construction of Klann-style Leg Mechanism

In this video, we start with a four-bar linkage and coupler curve and construct an additional crank with a floating link connected to the coupler point. This floating link becomes the leg of the Klann-style leg mechanism. Adjustment of the dimensions of the added links shapes the foot trajectory.