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James Troy

Seattle, Washington USA
jim.troy@boeing.com
Engineering Swept Volumes
6" x 6" x 20"

Artist Statement: Swept volume solids are 3D models that represent the space that objects occupy or sweep out while moving. We've been working with complex swept volumes at Boeing for several years and often come across ones with unique shapes. This display is a collection of some of those intersting models.

The concept is to display physical 3D models of engineering related swept volumes in a visually interesting way, allowing viewers to examine the models from all sides. The geometry for each model was created by the voxel-based software we've developed for use in our design analysis processes, which is based on the methods discussed in the haptics interaction paper we presented at SIGGRAPH99.

The display will consist of three vertically stacked, clear Plexiglas cubes each containing a physical 3D model (stereolithography). The stack will be approximately 18 inches high and 6 inches at the base. Next to the model stack will be a description of 3D models describing how they were created and used by designers at Boeing.

Below is a brief description of three different methods we've used to create the underlying motion of these types of models.

The first model is a representation of a human figure reach analysis motion for a new aircraft seating design project. The motion was created by keyframing positions of a human model performing several tasks, including reaching under the seat. The tessellated model was generated by the swept volume module of the Voxmap PointShell (VPS) software toolkit. The physical model was printed on a Z Corp model 406 color 3D printer.

The second model is of the extend/retract motion of the main landing gear of a large commercial aircraft. It is shown here without wheels for better visibility of internal linkages. The motion was created in CATIA and exported to our FlyThru (R) visualization software for the swept volume model creation using VPS.

The motion paths for the third model were created by manipulating objects in a haptics enabled, physically based, virtual environment. The collection of swept volumes shows the extraction of some hydraulic system components through an access port. The like the other two models, the tessellated solids were created by the swept volume generation functions of the VPS toolkit.

(Note: The 3D prints of the second and third models are not available at this time, but will also be created on the Z Corp printer.)
Engineering Swept Volumes
6" x 6" x 20"

Engineering Swept Volumes
6" x 6" x 20"