Accession Number : AD0636317

Title :   DIAL-READING PERFORMANCE AS A FUNCTION OF FREQUENCY OF VIBRATION AND HEAD RESTRAINT SYSTEM.

Descriptive Note : Final rept., Mar 64-Jan 65.

Corporate Author : CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Personal Author(s) : Taub, Harvey A.

Report Date : APR 1966

Pagination or Media Count : 28

Abstract : Dial-reading performance under vibration was investigated at 6, 11, and 15 cps, + 1 Gx (acceleration vector of gravity) plus or minus 1.1 gx (vibration) with three X-axis head restraint configurations (a rigid restraint system, a piston-spring damper system and a spring (only) isolator system) and two Z-axis head restraint configurations (head locked in Z-Axis and head allowed to move freely in the Z-axis). Ten subjects were tested. The results indicated that less decrements in performance occurred at 6 cps than at 11 and 15 cps. Further, the use of the X-axis piston-spring damper isolation system resulted in significantly less errors as compared to the X-axis rigid restraint system. At 15 cps, where all three X-axis head configurations could be compared, there was no difference in performance with the piston-spring and spring (only) systems, while both resulted in less errors than the rigid system. Finally, the Z-axis restraint system had an effect upon performance only at 15 cps. The data suggested that allowing the head to move freely in the Z-axis at 15 cps resulted in less errors than when the head was locked in the Z-axis. (Author)

Descriptors :   (*ASTRONAUTS, PERFORMANCE(HUMAN)), (*STRESS(PHYSIOLOGY), ASTRONAUTS), VIBRATION, ATMOSPHERE ENTRY, READING, DISPLAY SYSTEMS, HEAD(ANATOMY), SAFETY BELTS, FREQUENCY, FUNCTIONAL ANALYSIS

Subject Categories : Psychology
      Stress Physiology
      Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE