Accession Number:

AD0761199

Title:

Navy Vehicle Design and Construction: Measurement of Triaxial Vibration at SIGNIFICANT Human Interface Points on the CH-47C and SH-3A Helicopters

Descriptive Note:

Final rept.

Corporate Author:

NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA CREW SYSTEMS DEPT

Personal Author(s):

Report Date:

1972-12-31

Pagination or Media Count:

70.0

Abstract:

Triaxial vibration levels were recorded on the CH-47C and SH-3A helicopters at the pilots seat, collective control stick, rudder pedal, instrument panel, and the pilots head Z-axis only. These recordings were made on two separate two-hour flights for both helicopters. The first flight was a continuous mission profile representative of the helicopters primary mission. The second flight consisted of discrete maneuvers representative of a broad scope of mission profiles. The resulting vibration tapes were subjected to spectrum analysis and three peak frequencies found. These peaks were seen to be a function of the rotor head frequency and two harmonics of this frequency. Each of the three peak frequencies was shown to be critical in terms of human performance parameters.

Subject Categories:

  • Helicopters
  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE