Accession Number : ADA136563

Title :   An Investigation of Side-Stick Controller/Stability and Control Augmentation System Requirements for Helicopter Terrain Flight under Reduced Visibility Conditions,


Personal Author(s) : Aiken,E W ; Hilbert,K B ; Landis,K H ; Glusman,S I

PDF Url : ADA136563

Report Date : Jan 1983

Pagination or Media Count : 22

Abstract : A simulator experiment evaluated the effects of side-stick-controller characteristics and level of stability and control augmentation on handling qualities for several helicopter, low-altitude flight tasks conducted at night or in adverse weather. These reduced visibility tasks were simulated by providing the pilot with a visually coupled, helmet-mounted display of flight-control symbols superimposed upon terrain-board imagery. Forward-flight, low-speed, and precision-hover control modes were implemented, and a method for blending of control laws between each control mode was developed. Variations in the level of integration of primary control functions on a single side-stick controller were investigated. For most of the flight tasks investigated, separated controller configurations were preferred to a single, fully integrated sidestick device. Satisfactory handling qualities over all controller configurations were achieved only for a precision-hover task conducted with a high level of stability and control augmentation. Significant degradation in handling qualities occurred for most tasks flown with the helmet-mounted display relative to identical tasks flown under visual flight conditions.

Descriptors :   *Control sticks, *Flight simulation, *Flight control systems, Helicopters, Handling, Degradation, Flight maneuvers, Stabilization systems, Augmentation, Helmet mounted displays, Visual flight rules, Instrument flight, Low altitude, Terrain following, Pilots, Workload, Attack helicopters, Quality, Ratings

Subject Categories : Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE