Test method for empirically determining inertial properties of manual wheelchairs

Test method for empirically determining inertial properties of manual wheelchairs.

The iMachine is a spring-loaded turntable used to measure inertial properties of irregularly shaped rigid bodies, specifically manual wheelchairs. We used a Newton-Euler approach to calculate wheelchair mass and center of mass (CM) location from static force measurements using load cells. We determined the moment of inertia about the vertical axis from the natural frequency of the system in sim...

Evaluation of methods for determining rearward static stability of manual wheelchairs.

Wheelchair standards have been under development for several years. A set of tests has been approved by the American National Standards Institute (ANSI) and by the International Standards Organization (ISO) but continue to be refined. Static stability is one of the indicators used to evaluate manual wheelchairs and is measured by placing a loaded wheelchair on a platform that is tilted until th...

Curb descent testing of suspension manual wheelchairs.

Manual wheelchair users are subjected to whole-body vibrations (WBV) on a regular basis as they traverse obstacles and uneven surfaces. One way users could protect themselves from secondary injuries related to WBV is by using a suspension manual wheelchair. This study investigated the ability of suspension manual wheelchairs to reduce seat accelerations during curb descents of various heights (...

Performance Analysis of Suspension Manual Wheelchairs

Manual fluorometric paper disc method for determining tyrosine in blood.

A spectrophotofluorometric method is described for the determination of tyrosine in blood dried on filter paper discs. It has been found that by immersing the paper disc containing the dried blood in aqueoustrichioracetic acid, the blood proteins remain bound to the paper and the amino acid is eluted into the aqueousphase.This method of assay is based on the principle that tyrosine reacts with ...