Dataset: Investigating shock and vibration exposure of a manual wheelchair during multi-drum testing Jacob Misch 1,2 William Ammer 3 Stephen Sprigle 1,2 1 Rehabilitation Engineering and Applied Research Lab, Georgia Institute of Technology, Atlanta, Georgia, United States of America 2 School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America 3 Ammer Consulting, Glenshaw, Pennsylvania, United States of America Email contact: rearlab@gatech.edu The contents of this dataset and corresponding journal article were developed under a grant from the National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR grant number 90IFRE0036-01-02). NIDILRR is a Center within the Administration for Community Living (ACL), Department of Health and Human Services (HHS). The contents of this dataset and corresponding journal article do not necessarily represent the policy of NIDILRR, ACL, or HHS, and you should not assume endorsement by the Federal Government. This work was also supported in part by internal funding from the Rehabilitation Engineering and Applied Research (REAR) Lab. This data was used in the manuscript submitted to Disability and Rehabilitation: Assistive Technology, with submission ID: 234931831 Title: Investigating shock and vibration exposure of a manual wheelchair during multi-drum testing Authors: Jacob Misch, William Ammer, Stephen Sprigle DOI: The methods of data collection for the main outcome metrics (vibration, shock) are summarized in the journal article, with references to more detailed articles. The data analysis methods are described in depth within the journal article associated with this dataset. Data was collected in April 2023. This workbook includes a worksheet with data: "Data" - Raw measurements and processed values from the accelerometers related to the main outcome metrics (vibrations and vibration dose values for shocks) of each tested wheelchair configuration. More detailed descriptors of the data and column headers can be found in the worksheet. "Data" columns: LOCATION - The mounting location of the accelerometer. SEAT was mounted to the top surface of the flat foam seat cushion, under the loaded wheelchair dummy. AXLE was clamped to the rear axle of the wheelchair. FRAME was clamped to the cross-member frame tube underneath the seat. CASTER was clamped to the frame tube directly next to the caster stem. LOAD - Mass, in kg, of the wheelchair test dummy that was placed in the wheelchair for the duration of the multi-drum testing. The 80 kg dummy represented the mass of the robotic wheelchair occupant used in previous wheelchair vibration studies within the REAR Lab. The 125 kg dummy matched the listed maximum weight capacity of the manual wheelchair frame specified by the manufacturer. A_X - Root-mean-square (r.m.s.) value for the accelerometer reading (in m/s^2) along the fore-aft direction. The data was frequency-weighted according to ISO 2631-1. A_Y - Root-mean-square (r.m.s.) value for the accelerometer reading (in m/s^2) along the lateral (side-to-side) direction. The data was frequency-weighted according to ISO 2631-1. A_Z - Root-mean-square (r.m.s.) value for the accelerometer reading (in m/s^2) along the vertical direction. The data was frequency-weighted according to ISO 2631-1. A_XYZ - Root-mean-square (r.m.s.) value for the resultant (X-Y-Z) accelerations, in m/s^2. VDV_X - Vibration dose value (in m/s^1.75) along the fore-aft direction, calculated from the frequency-weighted accelerations in the same direction. VDV_Y - Vibration dose value (in m/s^1.75) along the lateral (side-to-side) direction, calculated from the frequency-weighted accelerations in the same direction. VDV_Z - Vibration dose value (in m/s^1.75) along the vertical direction, calculated from the frequency-weighted accelerations in the same direction. VDV_XYZ - Vibration dose value for the resultant (X-Y-Z) accelerations, in m/s^1.75. RAW_X - Root-mean-square (r.m.s.) value for accelerometer readings (in m/s^2) in the fore-aft direction. These measurements were not frequency-weighted or filtered using the filters described in ISO 2631-1. These are provided for ease of comparison but were not used in the associated manuscript. RAW_Y - Root-mean-square (r.m.s.) value for accelerometer readings (in m/s^2) in the lateral (side-to-side) direction. These measurements were not frequency-weighted or filtered using the filters described in ISO 2631-1. These are provided for ease of comparison but were not used in the associated manuscript. RAW_Z - Root-mean-square (r.m.s.) value for accelerometer readings (in m/s^2) in the vertical direction. These measurements were not frequency-weighted or filtered using the filters described in ISO 2631-1. These are provided for ease of comparison but were not used in the associated manuscript. RAW_XYZ - Root-mean-square (r.m.s.) value of the combined resultant (X-Y-Z) of the unfiltered accelerometer readings . DURATION - The duration of the measurement, in seconds. Longer trials were segmented into individual minute-long trials for analysis. Methods: The objective of this study was to investigate the standardized multi-drum wheelchair test to assess its ability to reflect real-world wheelchair usage conditions. Wheelchairs experience frequent breakdowns in everyday life, potentially injuring or immobilizing the wheelchair user. To address this, standardized 'accelerated durability' tests were developed. However, it is unclear if these tests reflect real-world usage conditions, as statistics show real-world failures and multi-drum failures differ. This study aimed to measure vibrations and shocks induced within a manual wheelchair frame during standardized multi-drum testing and compare the results with measurements previously reported for actual over-ground travel with a manual wheelchair. One aluminum ultra-lightweight manual wheelchair frame was used in this study (Rogue by Ki Mobility). This chair was equipped with 24x1-3/8" tires inflated to 75 psi on metal-spoked wheels, with solid 5x1" urethane casters and rigid aluminum caster forks. One wheelchair test dummy was seated in the wheelchair and the vehicle was loaded onto a standard multi-drum tester. Two masses were used for the dummy (80 kg, 125 kg) to represent different common loading configurations. Vibrations were recorded with triaxial accelerometers mounted to four locations, much like those found in [1,2]: (1) atop the seat cushion, under the dummy; (2) clamped to the rear axle; (3) clamped to a frame cross-member under the seat; and (4) clamped to the frame adjacent to the caster fork stem attachment point. Root-mean-square (r.m.s.) values of the frequency-weighted vibrations in all three directions (fore-aft, lateral, vertical) were reported for all four accelerometers at each location. Shock was measured using vibration dose values calculated from the same frequency-weighted accelerometer measurements. The vibration and shock values were presented and compared with values reported for real-world wheelchair usage in the literature. (More detailed methods can be found in the associated article in Disability and Rehabilitation: Assistive Technology) References in Methods: [1] Misch, J.; & Sprigle, S. (2022). "Estimating whole-body vibration limits of manual wheelchair mobility over common surfaces". Rehabil Assist Technol Eng. doi: 10.1177/20556683221092322. [2] Misch, J.; Liu, Y.; & Sprigle, S. (2022). "Effect of Wheels, Casters and Forks on Vibration Attenuation and Propulsion Cost of Manual Wheelchairs". IEEE Trans Neural Sys Rehabil Eng, Vol. 30, pp. 2661-2670. doi: 10.1109/TNSRE.2022.3205507