公开(公告)号：US20190369647A1

公开(公告)日：2019-12-05

申请号：US15996132

申请日：2018-06-01

Applicant: Bell Helicopter Textron Inc.

Inventor： Luke Dafydd Gillett ,  Sung Kyun Kim ,  Robert Earl Worsham, II

IPC: G05D1/08

Abstract: In an embodiment, a rotorcraft includes: a flight control computer configured to: receive a first sensor signal from a first aircraft sensor of the rotorcraft; receive a second sensor signal from a second aircraft sensor of the rotorcraft, the second aircraft sensor being different from the first aircraft sensor; combine the first sensor signal and the second sensor signal with a complementary filter to determine an estimated vertical speed of the rotorcraft; adjust flight control devices of the rotorcraft according to the estimated vertical speed of the rotorcraft, thereby changing flight characteristics of the rotorcraft; and reset the complementary filter in response to detecting the rotorcraft is grounded.

公开(公告)号：US10481615B2

公开(公告)日：2019-11-19

申请号：US15446911

申请日：2017-03-01

Applicant: Bell Helicopter Textron Inc.

Inventor： Sung Kyun Kim

IPC: G05D1/08 ,  B64C13/50 ,  B64C27/04 ,  B64C13/04

Abstract: A method of operating a rotorcraft includes transitioning from a first mode to a second mode when a velocity of the rotorcraft exceeds a first velocity threshold. Transitioning between the first and second modes includes fading out a gain of a dynamic controller over a first period of time, and decreasing a value of an integrator of the dynamic controller over a second period of time. In the first mode, the translational speed of the rotorcraft is determined based on a pilot stick signal, and in the second mode, an output of an attitude rate controller is proportional to an amplitude of the pilot stick signal.

公开(公告)号：US20190084690A1

公开(公告)日：2019-03-21

申请号：US15708767

申请日：2017-09-19

Applicant: Bell Helicopter Textron Inc.

Inventor： Christopher M. Bothwell ,  Robert Earl Worsham, II ,  Sung Kyun Kim ,  Brandon Jeffrey Thomas

IPC: B64D45/00 ,  B64C27/82 ,  B64D43/00

Abstract: In an embodiment, a rotorcraft includes: tail rotor blades; a tail rotor actuator coupled to the tail rotor blades such that the pitch of the tail rotor blades varies according to a current extension of the tail rotor actuator; pilot flight controls electrically coupled to the tail rotor actuator; and a flight control computer electrically coupled to the tail rotor actuator and the pilot flight controls, the flight control computer configured to: determine the current extension of the tail rotor actuator; determine whether the current extension of the tail rotor actuator is within a margin of a maximum extension of the tail rotor actuator; and indicate a first warning to a pilot in response to the current extension of the tail rotor actuator being within the margin of the maximum extension of the tail rotor actuator.

公开(公告)号：US20180292841A1

公开(公告)日：2018-10-11

申请号：US15484994

申请日：2017-04-11

Applicant: Bell Helicopter Textron Inc.

Inventor： Christopher Mike Bothwell ,  Sung Kyun Kim ,  Jillian Samantha Alfred ,  Robert Earl Worsham, II ,  Luke Dafydd Gillett ,  Morganne Cody Klein

IPC: G05D1/06 ,  B64C27/06 ,  B64C13/50 ,  B64C27/56 ,  B64C27/605

CPC classification number: G05D1/0607 ,  B64C13/50 ,  B64C13/503 ,  B64C27/06 ,  B64C27/56 ,  B64C27/605 ,  G05D1/0858

Abstract: A rotorcraft including a flight control computer (FCC) providing a vertical speed hold for the rotorcraft, a collective control, and a collective trim motor connected to the collective control. The collective trim motor moves the collective control according to a collective set command generated by the FCC according to a target vertical speed and when the FCC determines the collective control is in-detent. A collective position sensor is connected to the collective control. The collective position sensor generates, and sends to the FCC, a collective position signal indicating the position of the collective control. A flight control device controls a flight parameter of the rotorcraft in response to a flight control device control signal received from the FCC. The FCC generates the flight control device control signal according to the collective position signal, and sends the flight control device control signal to a flight control device.