Accession Number : ADA300600

Title :   Effects of Head Supported Devices on Pilot Performance During Simulated Helicopter Rides.

Descriptive Note : Final rept.,

Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

Personal Author(s) : Alem, Nabih M. ; Meyer, Martin D. ; Albano, John P.

PDF Url : ADA300600

Report Date : SEP 1995

Pagination or Media Count : 16

Abstract : Effects of helmet weight moments on helicopter pilot fatigue and performance during extended missions were evaluated in a study in which 12 volunteer subjects were exposed to random vibrations in 4-hour sessions while wearing various helmet configurations. One of the objectives of the study was to investigate an upper limit criterion of 83 N cm for the weight moment of head-worn devices previously proposed by Butler (1992). In this study, four helmet configurations, having weight moments of 20, 110, 200, and 290 N cm, were tested with each subject. Detection and acquisition of visual targets, a task often performed by AH-64 helicopter pilots, were simulated by requiring the subject to aim a light beam, emanating from a helmet-attached source, at light emitting diodes (LED) which were lit at random. Vigilance of the subject was measured by the duration the LED remained lit before it was turned off by the subject. Analysis of this vigilance data did not reveal a consistent relationship between exposure duration and performance. However, the vigilance data clearly demonstrated pilot performance degraded as the weight moment of the helmet increased, and that acquisition times were shortest for weight moments of about 78 N cm.

Descriptors :   *HELICOPTERS, *HELMET MOUNTED DISPLAYS, *HEAD UP DISPLAYS, VIBRATION, DETECTION, ACQUISITION, EXPOSURE(GENERAL), PERFORMANCE(HUMAN), VIGILANCE, PILOTS, LIGHT, MOMENTS, CONSISTENCY, LIMITATIONS, CONFIGURATIONS, MISSIONS, FATIGUE(MECHANICS), VISUAL TARGETS, LIGHT EMITTING DIODES, HELMETS.

Subject Categories : Anatomy and Physiology
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE