Proposed roll control criteria for the design of lateral control stick shaping functions in large transport aircraft

摘要

Two simulation experiments were performed at the NASA Ames Vertical Motion Simulator facility in order to develop/validate lateral flying qualities requirements for large transport aircraft. ^The objectives were to specify the optimum levels of roll control effectiveness and roll control sensitivity, the combination of which determines the shaping functions for lateral control inceptors. ^In addition, the effects of varying the roll mode time constant on aircraft flying qualities were considered. ^Roll control effectiveness was measured in terms of the minimum time required to reach 30 deg of bank angle change, while roll control sensitivity was measured in terms of the initial roll acceleration per pound force of lateral control inceptor input. ^The subject aircraft model represented a large, modern, supersonic, civil transport, with center control stick. ^For the roll control effectiveness criterion, the results verified the validity of the existing flying qualities Level boundaries in the terminal area. ^For the nonterminal area, however, the data suggested that the current boundaries are too restrictive, and new flying qualities Level boundaries were proposed. ^For the roll control sensitivity requirements, flying qualities Level boundaries were derived in both terminal and nonterminal area operations. ^The flying qualities Level 1 limit for the roll mode time constant was found to be faster than that suggested in the current requirements. ^(Author)