Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-09-24

Total Pages: 94

ISBN-13: 9781723975578

A piloted simulation study conducted in NASA Langley Visual Motion Simulator addressed the impact of dynamic aero- servoelastic effects on flying qualities of a High Speed Civil Transport. The intent was to determine effectiveness of measures to reduce the impact of aircraft flexibility on piloting tasks. Potential solutions examined were increasing frequency of elastic modes through structural stiffening, increasing damping of elastic modes through active control, elimination of control effector excitation of the lowest frequency elastic modes, and elimination of visual cues associated with elastic modes. Six test pilots evaluated and performed simulated maneuver tasks, encountering incidents wherein cockpit vibrations due to elastic modes fed back into the control stick through involuntary vibrations of the pilots upper body and arm. Structural stiffening and compensation of the visual display were of little benefit in alleviating this impact, while increased damping and elimination of control effector excitation of the elastic modes both offered great improvements when applied in sufficient degree.Raney, David L. and Jackson, E. Bruce and Buttrill, Carey S.Langley Research CenterSUPERSONIC TRANSPORTS; FLIGHT CHARACTERISTICS; COCKPITS; STRUCTURAL VIBRATION; ACTIVE CONTROL; DYNAMIC STRUCTURAL ANALYSIS; VISUAL STIMULI; VIBRATION DAMPING; STIFFENING; PILOT PERFORMANCE; DISPLAY DEVICES; CONTROL EQUIPMENT; MOTION SIMULATORS