Aircrew Vibration Exposure Characterization and Health Risk Assessment of the CV-22 Osprey
Abstract
This study characterized and assessed aircrew vibration exposure aboard the CV-22 Osprey tilt-rotor aircraft owned and operated by the 20th Special Operations Squadron located at Cannon AFB, NM. The ISO 2631-1: 1997, and other related standards, were used as the guidelines. Triaxial accelerations were collected at the seat base/rigid structure, seat pan, seat back, and helmet (pilot only) at the pilot, flight engineer (FE), and cabin aircrew stations. Multiple data records were collected for typical aircraft flight conditions. Acceleration spectra, and the overall unweighted and weighted accelerations (1-80 Hz) were calculated for all records. During airplane (APLN) mode, multi-axis acceleration peaks were observed at 16.5 Hz and associated with the blade passage frequency (BPF) (84 RPM). During conversion (CONV) mode, multi-axis peaks was observed at 20 Hz (BPF at 100 RPM). Both modes showed notable peaks at multiples of the BPF. For all data records, the seat pan and seat back point vibration total values (pVTVs) were calculated (vector sum of the overall weighted accelerations in three directions (X, Y, Z)). The overall vibration total values (oVTVs) for assessing comfort reaction (ISO 2631-1) was calculated as the vector sum of these pVTVs. The comfort reactions at the pilot and FE stations ranged from "a little uncomfortable" to "fairly uncomfortable". The comfort reactions at the cabin aircrew station ranged from "not uncomfortable" to "a little uncomfortable".
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 2023
- Accession Number
- AD1217135
Entities
People
- Suzanne D. Smith