公开(公告)号：US20210055324A1

公开(公告)日：2021-02-25

申请号：US16546832

申请日：2019-08-21

Applicant: Bell Textron Inc.

Inventor： Kip Gregory Campbell

IPC: G01P5/02 ,  G05D1/08 ,  G01C23/00

Abstract: According to one implementation of the present disclosure, a method for determining airspeed for an unpowered vehicle is disclosed. The method includes: during flight, determining, by an accelerometer disposed on the unpowered vehicle, first and second accelerometer outputs, where the first and second accelerometer outputs correspond to respective first and second body-fixed load factor measurements; determining an angle-of-attack parameter; determining a body Z-force coefficient based on the angle-of-attack parameter; and determining an airspeed value based on the second body-fixed load factor measurement and the second body-fixed coefficient.

公开(公告)号：US11209453B2

公开(公告)日：2021-12-28

申请号：US16546832

申请日：2019-08-21

Applicant: Bell Textron Inc.

Inventor： Kip Gregory Campbell

IPC: G01P5/02 ,  G01C23/00 ,  G05D1/08

Abstract: According to one implementation of the present disclosure, a method for determining airspeed for an unpowered vehicle is disclosed. The method includes: during flight, determining, by an accelerometer disposed on the unpowered vehicle, first and second accelerometer outputs, where the first and second accelerometer outputs correspond to respective first and second body-fixed load factor measurements; determining an angle-of-attack parameter; determining a body Z-force coefficient based on the angle-of-attack parameter; and determining an airspeed value based on the second body-fixed load factor measurement and the second body-fixed coefficient.

公开(公告)号：US20210371085A1

公开(公告)日：2021-12-02

申请号：US16889608

申请日：2020-06-01

Applicant: Bell Textron Inc.

Inventor： Kip Gregory Campbell

IPC: B64C13/24 ,  B64C39/02 ,  B64C27/50 ,  B64C11/28 ,  G05D1/10

Abstract: An unmanned rotorcraft includes an airframe, rotor blades that are coupled to the airframe for rotation therewith, a propulsion unit having a propeller, and an actuator that is coupled to the airframe and adapted to temporarily reorient the propulsion unit such that an axis of the propeller moves out of alignment with an axis of the rotor blades. Rotation of the propeller causes counter-rotation of the airframe and rotor blades. The rotor blades and blades of the propeller are adapted to deploy from collapsed positions when flight of the rotorcraft is initiated. A method of operation by the rotorcraft includes, when it is determined that a current heading does not correspond to a determined flight path, causing the actuator to temporarily reorient the propulsion unit in accordance with an angular orientation of the actuator relative to the current heading.

公开(公告)号：US20210056857A1

公开(公告)日：2021-02-25

申请号：US16545938

申请日：2019-08-20

Applicant: Bell Textron Inc.

Inventor： Kip Gregory Campbell ,  Juan Li

IPC: G08G5/04 ,  B64C39/02 ,  B64D31/00 ,  G08G5/00 ,  G05D1/10

Abstract: According to one implementation of the present disclosure, a method for formation flight is disclosed. The method includes: during flight, arranging for a first aircraft to fly into a proximity range of a second aircraft; and determining first aircraft positioning based on power consumption data of the first aircraft, where the first aircraft positioning corresponds to power-reducing formation flight of the first aircraft.