Quantifying Patient Vibration Patterns During Aeromedical Evacuation (AE) Aboard the CV-22 Osprey
Abstract
This study characterized and assessed litter patient vibration exposure aboard the CV-22 Osprey tilt-rotor aircraft during aeromedical evacuation (AE). The study was supported by the 20th Special Operations Squadron located at Cannon AFB, NM. The ISO 2631-1: 1997 was used as the guideline for assessing patient comfort. Triaxial accelerations were collected on the floor-mounted standard 7309 litter (forward cabin) and Stokes litter (aft cabin) at the pelvis and back interfaces, at the occupants chest and head (bitebar), and at the floor. Multiple data records were collected for typical aircraft flight conditions. In both cruise airplane (APLN) mode and conversion (CONV) mode, multi-axis acceleration peaks were observed at all measurement sites between 5.5 and 6.5 Hz in the vicinity of the propeller rotation frequency (PRF), depending on the rotor RPM. Both flight modes also showed multi-axis acceleration peaks between 16.5 and 20 Hz associated with the blade passage frequency (BPF), as well as some peaks at multiples of the BPF. The highest overall unweighted accelerations (1-80 Hz) tended to occur in one or more horizontal directions at most measurement sites with Litter A.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 20, 2024
- Accession Number
- AD1223777
Entities
People
- Christopher J. Dooley
- Suzanne D. Smith