Biomedical Engineering Reference
In-Depth Information
Chapter 7
Optimization Potential of the Method
Abstract Based on the B
OSS
-Procedure (Chap. 2), an approach towards biome-
chanical shape optimization of body support devices prior to the manufacturing
process is presented. A 'manual' approach is demonstrated using various types of
bedding (Sect. 7.1) and an 'automated' approach, based on an optimization algo-
rithm is demonstrated using the example of a soft foam cushion (Sect. 7.2). Bedding
system simulation results are compared with pressure measurements based on a
pressure mapping device. The 'automated' approach comprising a shape optimi-
zation algorithm as illustrated in Sect. 7.2 is employed for commercial automotive
seating devices together with a female and a male B
OSS
-Model (Sect. 7.3).
7.1 Biomechanically Optimized Bedding System
The goal was to develop a novel bedding system providing optimal sleeping
comfort based on the principles of pressure and back pressure. Each relevant body
part (head, spine, buttocks and legs) was intended to be optimally supported in any
body position. The bedding, employing the pressure-back-pressure principle, was
designed to provide a micro-stimulating massage effect. The massage effect was to
be initiated by body and breathing movements during all sleep phases to provide
healthy, relaxing sleep.
7.1.1 Bedding System Designs
7.1.1.1 Basic System and FE-Modelling
The initial bedding system design illustrated in Fig.
7.1
[referred to as 'base
system' (BS)] consists of cross beams with T-sections, guiding for every T-beam,
an air-filled membrane (air mattress) and an enclosing soft foam cover. To attain
