Advanced Vehicle Seat Design by R7OqsR

VIEWS: 9 PAGES: 16

									             Dan Damon
          Kevin Hampton
            Christine Lee
          Shane Siwinski



  ADVISOR: Professer Lin
SPONSER: General Motors
           PROBLEM STATEMENT



 Design an advanced, adaptive driver’s seat that
 maintains occupant safety, enhances comfort and
 meets current ergonomic standards.
              REQUIREMENTS

Requirements as provided by GM / Prof. Lin:
 Innovative
 Ergonomic
 Adaptive
 Safe


 Include Pneumatics
 Designed for integration with future
 advancements
 RESULTING PROJECT SCOPE

Project Scope:          Outside of Scope:
 Lumbar support        • Safety belt
 Side support          • Orientation within
 Seat lengthening        car
  option                • Head Rest
 Ergonomic pan
                           – Whiplash
  contour
                        • User Interface
 Designed for future
  integration           • Automation
                        • Sensors /
                          intelligence
                  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
               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
           PRELIMINARY DESIGN




•Beam Deformation
•Pistons
•Mesh Surface
         PRELIMINARY DESIGN: Flaws

 Lumbar support geometry

 Anticipated seat thickness (15”+)

 Complex
    16 pistons
    24 universal joints


 Material:
   Thermal effects?
   Fatigue?


 Mesh tensioning
         RECOMMENDED DESIGN

 Adjustable Lumbar support


 Adjustable Bolsters


 Adjustable Pan Length


 Ergonomic Pan Contour


 Components: Independent Modules
                  LUMBAR COMPONENT

• Pneumatic actuation of lumbar vertical motion
•10 inch radius got lumbar curve
                                                                 Guide Rails
•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




                 }
                                                   Lumbar Form


                                                   Pneumatic
                                                   bladders
    Engineering of Lumbar Components

 Designing thickness
 for collapse

 Material removed to
 lessen stiffness

 Ribs added to
 strengthen lumbar
 surface
             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
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
                          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                      5°                 10°

   Additional relief from loading of the
    lumbar vertebrae                                                   5
                                                             Min. 16
   Enables joint / disc hydration                           Max. 20
                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
              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

								
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