Unigraphics software was used for the design of new components and assemblies, packaging studies, production of clay models, and CNC programming. An X-frame crossover design was chosen as the best able to meet the project objectives, which included minimizing weight, providing four doors, and seating four adults comfortably. Millard engineers used Unigraphics solid modeling to define the frame's geometry and to design the clamshell power door system. The four single-hinged doors open and close sequentially through electrical and optical controls without any manual force. They are operated by electric linear motors that also engage the locking mechanisms.
Activation is by fingertip controls or voice commands from the inside and touch pads on the outside.
This module was first used to validate the kinematic operation of the hinge system. The software traced envelope options and detected potential interferences. It also was used to calculate reaction forces so the motors and other components could be specified. All the suppliers that used electronic methods other than Unigraphics were asked to convert their data to the IGES neutral file format. Each of these files was then converted into a Unigraphics solid model by Millard designers.