公开(公告)号：US20210229798A1

公开(公告)日：2021-07-29

申请号：US16775531

申请日：2020-01-29

Applicant: Bell Textron Inc.

Inventor： Kevin Thomas CHRISTENSEN ,  Hunter Barton NELSON ,  Martin Wesley SHUBERT ,  Paul David RUCKEL

IPC: B64C19/02 ,  B64C15/12

Abstract: An exemplary method for controlling low speed flight of an aircraft having a controller receiving pilot input includes transitioning from a translational rate command (TRC) to a linear acceleration command (LAC) when the controller is displaced above a control transition displacement (CTD), and while in LAC holding speed when the controller is relaxed to CTD.

公开(公告)号：US20210261237A1

公开(公告)日：2021-08-26

申请号：US17317657

申请日：2021-05-11

Applicant: Bell Textron Inc.

Inventor： Brady Garrett ATKINS ,  Michael David TRANTHAM ,  Paul David RUCKEL

IPC: B64C13/16 ,  B64C29/00 ,  B64C13/50

Abstract: A system and method for preventing a maximum asymmetric condition between pylon tilt angles due to a degraded pylon in a fly-by-wire tiltrotor aircraft during transitions between airplane mode and helicopter mode includes a conversion system for imparting movement on a right and left pylon. A flight control computer is operatively connected to a set of transducers for measuring pylon angles. The flight control computer is further connected to a set of actuators which are attached to each pylon. The flight control computer receives flight dynamics input from the set of transducers and/or the pilot and sends pylon command to the set of actuators. The conversion system measures the difference between the pylon angles during the transition and provides a pylon command adjustment if the difference exceeds a preset threshold.