Subjects:įour adult men with complete motor tetraplegia (n=2) and paraplegia (n=2) agreed to participate. The frequency domain analysis brakes down the force and acceleration into their frequency content, and allows us to compare the results in the frequency range that is most harmful or uncomfortable to people. The time domain analysis will show the absolute force and acceleration experienced by the rider. Time and frequency domain analysis was performed to examine the forces and accelerations experienced by the riders. Mobile data collection system was used to collect data along the propulsion. Each subject propelled the instrumented chair through the test course with self-selected speed. The methodology of our current study is to simulate the wheelchair testing in the real world propulsion and measure the forces and accelerations acting on the rider when the subjects traversed a test course.
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The goal of this paper is to quantify the vibration experienced by manual wheelchair users and to determine if suspension can reduce the forces through the rider during riding, including wheelchair propulsion. Therefore, knowledge of the forces and accelerations experienced by the rider is important for understanding the benefits these suspension chairs provide.
To improve the ride, manufacturers developed designs using innovative caster, frames, and suspension systems to reduce shocks and vibration. It is also suspected that the added loads of a harsh ride can contribute to muscle fatigue }. Exposure to excessive shocks and vibration has been linked to back } and neck } pain. Wheelchair vibration, suspension system, force and accelerations, spinal cord injury, BACKGROUND:įor many persons with a spinal cord injury (SCI), the most common method of mobility is a wheelchair. We hypothesized that the front caster and rear wheel suspension system will reduce the vibration experienced by individuals propelling over the test track. The purpose of this study was to determine the influence of front caster and rear wheel suspension on seat forces and head accelerations experienced by individuals during overground wheelchair propulsion with a rigid frame wheelchair and 3 rear wheel suspension frame wheelchairs. Exposure to shocks and vibrations is a growing concern to the mobility and function of wheelchair users.
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