On Flying-Handling Qualities of B747-100 Longitudinal Flight based on Gain Scheduling Control

Authors : Ezzeddin ELARBIA, Abdulhamid GHMMAM, Saad ISSA

Pages : 113-124

View : 13 | Download : 13

Publication Date : 2020-12-31

Article Type : Research Paper

Abstract :This paper evaluates flying handling qualities insert ignore into journalissuearticles values(FHQ); for the Boeing 747-100 insert ignore into journalissuearticles values(B747-100); in longitudinal flight. A genuine control has been realized using the spline gain-scheduling approach and full-state feedback linear quadratic regulator insert ignore into journalissuearticles values(FSFLQR);. Converged steady-state responses have been shown for longitudinal states over Mach number and altitude ranging from 0.2 to 0.9 and sea-level to 12190m respectively. However, the FHQ verifications of such gain-scheduling control design are done using control anticipation parameter insert ignore into journalissuearticles values(CAP);, normalised parameters of pitch rate and Cstar insert ignore into journalissuearticles values(combination effects of pitch rate, pitch and normal acceleration responses);. The controller has been identified at which those conditions to be reformulated so that all the FHQ criteria are being satisfied. The CAP criterion well respects the level I of FHQ boundaries. However, some spectra of normalised pitch rate and Cstar with respect to their steady states slightly infringe the FHQ boundaries. This study has shown such a successful implementation of the gain-scheduling controller in terms of converged normal accelerations as well.
Keywords : Flying handling quality, Tracking longitudinal responses, Gain scheduling, Pitch rate criterion, CAP criterion, Cstar criterion, Normal acceleration