CV-22 Human Vibration Evaluation
Interim rept. for Apr-Oct 2007
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
Pagination or Media Count:
The purpose of this study was to characterize and assess human vibration exposure onboard the CV-22 Osprey. Triaxial acceleration data were collected at the pilot station and flight engineer station in the cockpit, and at the crew chief station located at the front right side of the cabin. At all three stations, measurements were made at the seat base and at the interfaces between the occupant and seat pan and occupant and seat back for selected flight conditions. Acceleration data were also collected at the pilot helmet. The engineering data were used to evaluate characteristics of the frequency spectra as well as the direction, measurement site, and location station dependence of the vibration levels. Special conditions, including the disabling of the Active Vibration Suppression System AVSS and a light vs heavy aircraft, were also evaluated. The accelerations at the seat pan and seat back were weighted in accordance with ISO 2631-1 1997 Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration - Part 1 General requirements 1 are used to assess the comfort and health risk of the exposures. A rating scale of satisfactory, marginal, and unsatisfactory was established for comfort and health risk based on the standard guidelines. The overall rating for comfort was marginal. The overall rating for health risk was marginal based on data collected at the pilot station with an exposure time greater than 3 hours but less than 10 hours in duration.
- Human Factors Engineering and Man Machine Systems