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The cost of product development is driven by an iterative design process that relies upon
subjective opinions and prototype expenses in materials and labor. ERL, LLC has developed
tools that minimize this cost by incorporating human body models in a biomechanically
biocompatible optimization algorithm that iterates the design and evaluation in the computer.
Seat design is developed in CAD-integrated software using an optimization algorithm and
patented human body models to calculate seat patches
at loaded and contact points on the STO surface. Seat stiffness defines deflection under the weight
of the occupant. This software calculates a Comfort Score that correlates highly
(r = 0.8)
with ride data from drivers.
With the seat patch geometry defining the
centerline shape, bolster shape and head restraint
position for FMVSS 202a, the stylist has no difficulty applying an artistic vision
that can be built by the supplier. Thus, the use of ERL reduces
iterations at the Design Studio, provides communication between Engineering and Studio,
and establishes a set of specifications that the Supplier must follow in a
process that has been developed from math data. This software is the only seat design
software in the world and represents a major advance in the state of the art in seat design
and evaluation. With ERL, the seat design process becomes mathematical.
Standards for Seat Design
1. Design meets foam manufacturability tests
2. Design meets meat-to-metal criteria
3. Seat passes H-point test of SgRP
4. Seat passes states test of FMVSS 202a
5. Seat meets or exceeds comfort of ERLRUN_BR1
6. Occupants reach seat & vehicle controls comfortably
7. Seating package meets market criteria
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