Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"seat cushion"”.
-
The design and performance of a low-cost inflatable wheelchair seat cushion
For wheelchair users, the use of wheelchair seat cushions is vital to preventing life-threatening pressure sores, but high quality air cushions are often too expensive and inaccessible for many people. Given the prevalence of pressure sores, there is a need for a more accessible alternative to …
-
A Study of the Effect of Varying Air-Inflated Seat Cushion Parameters on Seating Comfort
For many years seat cushions have been investigated for their ability to reduce seating discomfort. The objective of this thesis is to examine air-inflated seat cushions to determine how seating comfort (determined by pressure change rate) is affected by changing various parameters of the cushion. …
-
A Comparative Analysis of Air-inflated and Foam Seat Cushions for Truck Seats
… comprehensive comparison between an air-inflated seat cushion designed for truck seats and a commonly used foam cushion is provided, using a single-axis test rig designed for dynamic seat testing. Different types of tests are conducted in order to evaluate various aspects of each type of cushion; …
-
Field Study to Evaluate Driver Fatigue Performance in Air-Inflated Truck Seats
… understand the relationship between vehicle seat design and driver fatigue, improve two newly proposed objective methods for evaluating driver fatigue, and provide design guidelines for evaluating and improving vehicle seat characteristics in terms of driver fatigue. Each driver completed a …
-
Development of a Multi-Body Nonlinear Model for a Seat-Occupant System
A car seat is an important component of today's cars, which directly affects ride comfort experienced by occupants. Currently, the process of ride comfort evaluation is subjective. Alternatively, the ride comfort can be evaluated by a series of objective metrics in the dynamic response of the …
-
Enhanced comfort of seating systems through variable shape and compliance
A new type of seat cushion has been developed. The present use of the cushion is in wheelchair seating, but it may ultimately have application to general seating, particularly in situations where comfort is a significant consideration. The cushion is intended to optimally distribute the interface …
-
Objective assessment of static and dynamic seats under vehicular vibrations
… for performance assessment of automotive seats are reviewed. A comparative study of vibration transmission performance of the seats obtained with a number of subjects representing 50 th percentile male population and with an equivalent passive load is performed. The experimental results …
-
Experimental and numerical investigation of the dynamic seat comfort in aircrafts.
This research focuses on the dynamic seat comfort in aircrafts specifically during takeoff, landing and cruise through turbulence flight conditions. The experiments are performed using a multi axis shaker table in the Automotive Centre of Excellence (ACE) at the University of Ontario Institute of …
-
Study of driver-seat interactions and enhancement of vehicular ride vibration environment
… design and analysis of secondary suspension, and seating dynamics. Relationships between biodynamic measures are derived through analysis of measured data and selected biodynamic models. The magnitude of variations in subject characteristics and test conditions can be significantly reduced by …