The dynamic characteristics and human perception of higher frequency multi-axis vibration associated with a military propeller aircraft environment were investigated. Triaxial accelerations were measured at the interfaces between the occupant and aircraft seat surface (seat pan and seat back) to evaluate and compare the effects of the aircraft seat fitted with different cushions. While all cushions showed a significant reduction in the X-axis seat pan vibration as compared to the original operational seat cushion at the blade passage frequency (BPF approximately 73.5 Hz), the associated accelerations remained significantly higher than the floor input accelerations. Transmissibility data confirmed these seat system characteristics at higher frequencies. A body region perception survey suggested that the subjects were most sensitive to the BPF component of the operational exposure in contrast to the results for the weighted acceleration levels (ISO 2631-1: 1997). Effective multi-axis vibration mitigation strategies depend on the relationships between the location, direction, magnitude, and frequency of vibration entering the occupant and human perception of the exposure. Current human exposure guidelines may not optimally reflect these relationships for assessing higher frequency propeller aircraft work environments.
Dynamic Characteristics and Human Perception of Vibration Aboard a Military Propeller Aircraft
2007
37 pages
Report
Keine Angabe
Englisch
Aircraft , Psychology , Psychiatry , Anatomy , Physiology , Structural Mechanics , Vibration , Human body , Perception(Psychology) , Aerial propellers , Military aircraft , Cushioning , Aircraft seats , Exposure(Physiology) , Acceleration , Weighting functions , Whole-body vibration , Propeller aircraft , Prolonged exposures , Frequency weightings , Human vibration perception
Human Vibration Assessment and Mitigation in Military Propeller-Driven Aircraft
British Library Conference Proceedings | 2004
|Vibration characteristics of aircraft engine-propeller systems
Engineering Index Backfile | 1939
|Vibration Characteristics of Aircraft Engine-Propeller Systems
SAE Technical Papers | 1939
|