ADVANCED VEHCILE SEAT DESIGN
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Transcript of ADVANCED VEHCILE SEAT DESIGN
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Dan DamonKevin Hampton
Christine LeeShane Siwinski
ADVISOR: Professer Lin
SPONSER: General Motors
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PROBLEM STATEMENT
Design an advanced, adaptive Design an advanced, adaptive driver’s seatdriver’s seat that maintains occupant safety, enhances that maintains occupant safety, enhances comfort and meets current ergonomic comfort and meets current ergonomic standards.standards.
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REQUIREMENTS
Requirements as provided by GM / Prof. Lin: InnovativeErgonomicAdaptiveSafe
Include PneumaticsDesigned for integration with future
advancements
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RESULTING PROJECT SCOPE
Project Scope: Lumbar supportSide support Seat lengthening
option Ergonomic pan
contourDesigned for
future integration
Outside of Scope: • Safety belt • Orientation within
car• Head Rest
– Whiplash• User Interface• Automation• Sensors /
intelligence
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NEED FOR PROJECT
Improve the driver’s overall experience Increased comfort
Reduces fidgeting by maintaining proper posture Reduce risk of musculoskeletal injury and
intervertebral disc degeneration Both achieved by design for proper ergonomics
Adjustable provides a sense of customization Accommodates > 95% of the adult population
Advanced features increase marketability of product
Improved benefit of long-term physical health
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RESEARCH: Ergonomics
Problem: Disc Degeneration Sitting de-rotates pelvis Flattens lumbar curve
Loads intervertebral discs
Solution Prevent pelvic de-rotation Support lumbar Curve
Anthropometric data Research range of dimensions to
increase adjustablity
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PRELIMINARY DESIGN
•Beam Deformation
•Pistons
•Mesh Surface
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PRELIMINARY DESIGN: Flaws
Lumbar support geometry
Anticipated seat thickness (15”+)
Complex 16 pistons 24 universal joints
Material: Thermal effects? Fatigue?
Mesh tensioning
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RECOMMENDED DESIGN
Adjustable Lumbar support
Adjustable Bolsters
Adjustable Pan Length
Ergonomic Pan Contour
Components: Independent Modules
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LUMBAR COMPONENT
} Pneumatic bladders
Lumbar Form
Guide Rails
• Pneumatic actuation of lumbar vertical motion
•10 inch radius got lumbar curve
•Vertical range of 5 inches, 7-12 from center of lumbar form to seat pan
•Depth range of 2 inches
•Collapsible design for injury prevention
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Engineering of Lumbar Components
Designing thickness for collapse
Material removed to lessen stiffness
Ribs added to strengthen lumbar surface
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BOLSTER SUPPORT SYSTEM
Adjustable Provides personalized
fit for a variety of body types Range of 4.2 inches
Support for intense cornering Increases comfort
Pneumatic actuation system
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PAN LENGTHENING MECHANISM
Adjustable pan length Shorter Drivers: Pan
retracts relieving pressure on popliteal fold Avoid restricting
circulation
Taller Drivers: Supports longer legs Increases sense of comfort
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PAN CONTOUR
-10° anterior angle of the back of pan Prevent pelvic de-rotation Experiments conducted by Herman
Miller reported discomfort at angles from 20-30° Field testing to be conducted in future
work to assess the benefit of the 10° angle
Negative space under coccyx bone Additional relief from loading of the
lumbar vertebrae Enables joint / disc hydration
Min. 16 Max. 20
5
5° 10°
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MODULAR COMPONENTS
Adjustable components increases moving parts Decreases system reliability
Modules Isolate failed subsystems Standardize seat components Improve manufacturability Decreases maintenance time, replacement costs, and
waste
• Bolster & Pan modules designed with quick disconnect latches
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FUTURE ADVANCEMENT
Recommended technology for integration Continuous Passive Motion (CPM)
Origin: recovery of orthopedic surgery / injury Joints need to remain mobilized for proper hydration Use: cycle lumbar curve through subtle range of motion
Intelligent Automated Adjustment response system Benefit: provide a customized fit to occupants
Capable of accommodating 100% of the population Future Research: pressure sensors Future Development: intelligent pressure response
system