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Design for Ergonomics
VEHICLE SEAT DESIGN: STATE OF THE ART AND RECENT
DEVELOPMENT
Introduction
 Seating comfort is a major concern for drivers and other members of the work
force who are exposed to extended periods of sitting and its associated side
effects.
 Research literature has shown that some of the main factors that affect seating
comfort are seat interface pressure distribution, whole-body vibration and
pressure change rate.
 The different requirements of commercial trucks and personal automobiles have
led to separate directions in seat design.
 This paper describes the research and development for vehicle seats based on
literature review of journals, technical reports and thesis.
Problem Identification
 According to Occupational Outlook Handbook by United State Department of
Labor, the truck drivers frequently work 50 or more hours a week.
 Assuming four weeks vacation and one more for holidays, which is about 2350
hours driving time per year.
 Automotive seats, which are in contact with vehicle occupants, play an important
role in improving the comfort and work environment of a driver and passengers.
 The improvement of automotive seating systems, particularly for the driver, has
been the subject of intense interest for many years since a driver feels more
fatigue than passengers.
Seating Discomfort
Human experience mode Physiology cause Engineering cause Seat/ Environment
Pain Circulation occlusion Pressure Cushion stiffness
Pain Ischemia Pressure Cushion stiffness
Pain Nerve occlusion Pressure Seat contour
Discomfort Vibration Vehicle ride
Percpiration Heat Material
Breathability
Perception Visual/ auditory/ tacticle Design/ vibrations Vehicle cost
Approach Based on Various Engineering Causes
VIBRATION
APPROACH
PRESSURE
APPROACH
ERGONOMIC
APPROACH
MEDICAL
APPROACH
THERMAL
COMFORT
ARTIFICIAL
INTELLIGENCE
Ergonomic Approach
 Driver posture is one of the most important issues to be considered in the vehicle
design process regarding not only the car and the user but also the experimental
conditions.
 Alem and Strawn:- An energy absorbing truck seat
 Cho and Yoon:- Biomechanical model of humans on a seat
 Coelho and Dahlman:- Car seat side support
 In future studies, research should be concentrated on knowledge improvement of
the exposure–response relationship between whole-body vibration and the
occurrence of low back disorder.
Summary
 From this literature review, it can be seen that the majority of vehicle seats studies
are concentrating on vibration, pressure and ergonomics.
 Besides, these topics, driver “fatigue” also needs to be considered in vehicle seat
design.
 Fatigue may lead to decreased attention, perception, decision-making, vigilance,
and reaction time.
 Future research on seat thermal and humidity comfort can be concentrated on
intelligent thermal and humidity control system and evaluate the physiological
seat comfort for drivers by using on-the-road experiment testing.
THANK YOU!
Presented By:- Prathamesh J. Phadnis

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Design for ergonomics

  • 1. Design for Ergonomics VEHICLE SEAT DESIGN: STATE OF THE ART AND RECENT DEVELOPMENT
  • 2. Introduction  Seating comfort is a major concern for drivers and other members of the work force who are exposed to extended periods of sitting and its associated side effects.  Research literature has shown that some of the main factors that affect seating comfort are seat interface pressure distribution, whole-body vibration and pressure change rate.  The different requirements of commercial trucks and personal automobiles have led to separate directions in seat design.  This paper describes the research and development for vehicle seats based on literature review of journals, technical reports and thesis.
  • 3. Problem Identification  According to Occupational Outlook Handbook by United State Department of Labor, the truck drivers frequently work 50 or more hours a week.  Assuming four weeks vacation and one more for holidays, which is about 2350 hours driving time per year.  Automotive seats, which are in contact with vehicle occupants, play an important role in improving the comfort and work environment of a driver and passengers.  The improvement of automotive seating systems, particularly for the driver, has been the subject of intense interest for many years since a driver feels more fatigue than passengers.
  • 4. Seating Discomfort Human experience mode Physiology cause Engineering cause Seat/ Environment Pain Circulation occlusion Pressure Cushion stiffness Pain Ischemia Pressure Cushion stiffness Pain Nerve occlusion Pressure Seat contour Discomfort Vibration Vehicle ride Percpiration Heat Material Breathability Perception Visual/ auditory/ tacticle Design/ vibrations Vehicle cost
  • 5. Approach Based on Various Engineering Causes VIBRATION APPROACH PRESSURE APPROACH ERGONOMIC APPROACH MEDICAL APPROACH THERMAL COMFORT ARTIFICIAL INTELLIGENCE
  • 6. Ergonomic Approach  Driver posture is one of the most important issues to be considered in the vehicle design process regarding not only the car and the user but also the experimental conditions.  Alem and Strawn:- An energy absorbing truck seat  Cho and Yoon:- Biomechanical model of humans on a seat  Coelho and Dahlman:- Car seat side support  In future studies, research should be concentrated on knowledge improvement of the exposure–response relationship between whole-body vibration and the occurrence of low back disorder.
  • 7. Summary  From this literature review, it can be seen that the majority of vehicle seats studies are concentrating on vibration, pressure and ergonomics.  Besides, these topics, driver “fatigue” also needs to be considered in vehicle seat design.  Fatigue may lead to decreased attention, perception, decision-making, vigilance, and reaction time.  Future research on seat thermal and humidity comfort can be concentrated on intelligent thermal and humidity control system and evaluate the physiological seat comfort for drivers by using on-the-road experiment testing.
  • 8. THANK YOU! Presented By:- Prathamesh J. Phadnis