Accession Number : ADA198150

Title :   An Investigation of the Ability to Recover from Transients Following Failures for Single-Pilot Rotorcraft,

Corporate Author : NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER

Personal Author(s) : Mansur, M H ; Schroeder, Jeffery A

PDF Url : ADA198150

Report Date : May 1988

Pagination or Media Count : 43

Abstract : A moving base simulation was conducted to investigate a pilot's ability to recover from transients following single-axis hard-over failures of the flight control system. The investigation was performed in conjunction with a host simulation that examined the influence of control modes on a single pilot's ability to perform various mission elements under high-workload conditions. The NASA Ames large amplitude motion Vertical Motion Simulator (VMS) was utilized, and the experimental variables were the failure axis, the severity of the failure, and the airspeed at which the failure occurred. Other factors, such as pilot workload and terrain and obstacle proximity at the time of failure, were kept as constant as possible within the framework of the host simulation task scenarios. No explicit failure warnings were presented to the pilot. Data from the experiment are shown, and pilot ratings are compared with the proposed handling-qualities requirements for military rotorcraft. Results indicate that the current proposed failure transient requirements may need revision. Keywords: Helicopters, Control system failures. (sdw)

Descriptors :   *FLIGHT CONTROL SYSTEMS, *HELICOPTERS, AIRSPEED, CONTROL SYSTEMS, FAILURE, MILITARY AIRCRAFT, MISSIONS, MOTION, PILOTS, RATINGS, REQUIREMENTS, ROTARY WING AIRCRAFT, SCENARIOS, SIMULATION, TERRAIN, TRANSIENTS, VARIABLES, WARNING SYSTEMS, WORKLOAD

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE