IP Library Granted Patent US 11,685,530
Granted Patent B1
US 11,685,530 · App. 17/932,708 · Granted Jun 27, 2023

Aircraft seat

Inventors: Stephen Howard Fagan (Wichita, KS); Paul Stokholm Warren (Wichita, KS); Emily O'Kelley Pearson (Wichita, KS); Jeremy Joseph Kneuper (Hesston, KS); Phillip Anthony Kendrick (Wichita, KS)
Assignee: Textron Innovations, Inc.
B64D11/0619B64D11/064B64D11/06395
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Quick Facts
Patent No.
US 11,685,530
App. No.
17/932,708
Granted
Jun 27, 2023
Kind
B1
Abstract

A seat base includes a plurality of linear actuators each having a first end pivotally mounted to a base member and a second end pivotally mounted to a seat member. A controller is adapted for controlling an extension length of each of the plurality of linear actuators in a coordinated manner for adjusting a position of the seat member with six degrees-of-freedom and for damping vibration of the seat member. An active vibration mitigation method for reducing vibrations of an aircraft seat includes receiving vibration data from one or more accelerometers mounted to the aircraft seat and determining a vibration profile based on the vibration data. When vibration mitigation is warranted, control signals for damping vibration are determined and transmitted to a plurality of linear actuators adapted to support the aircraft seat.

Claims (40)

1. An active vibration mitigation method for reducing vibrations of a seat onboard an aircraft, comprising:

determining, via a controller, an expected level of vibration for the seat based on command inputs from a pilot control device or autopilot servo;

receiving, via the controller, vibration data from one or more accelerometers located onboard the aircraft;

determining a vibration profile of the seat based on the vibration data;

determining whether vibration mitigation is warranted based on the expected level of vibration and the vibration profile; and

when vibration mitigation is warranted, determining control signals for damping vibration and transmitting the control signals to a plurality of linear actuators adapted to support the seat.

2. The active vibration mitigation method of claim 1 , wherein determining the vibration profile comprises filtering the vibration data to exclude low amplitude and low frequency vibrations.

3. The active vibration mitigation method of claim 1 , wherein determining the vibration profile comprises filtering the vibration data to exclude cutout frequencies.

4. The active vibration mitigation method of claim 1 , comprising:

receiving aircraft avionics data via the controller;

determining an aircraft phase of flight based on the aircraft avionics data; and

determining the expected level of vibration for the seat based on the aircraft phase of flight.

5. The active vibration mitigation method of claim 4 , comprising:

moving the seat via the plurality of linear actuators based on the aircraft phase of flight.

6. The active vibration mitigation method of claim 1 , comprising:

extending/retracting the plurality of linear actuators in a coordinated manner for counteracting expected aircraft motion based on the command inputs.

7. The active vibration mitigation method of claim 1 , comprising actively controlling vibration of the aircraft seat induced while taxiing, during landing, or from air turbulence during flight.

8. The active vibration mitigation method of claim 1 , comprising:

receiving first vibration data from a center-of-gravity accelerometer located at a center-of-gravity of the aircraft and second vibration data from a seat accelerometer located at a seat base; and

determining control signals for damping vibration of the seat base by reducing a difference between the first vibration data and the second vibration data.

9. The active vibration mitigation method of claim 1 , comprising providing height adjustability, inboard/outboard tracking and tilting, forward/aft tracking and tilting, and swiveling of the aircraft seat by coordinating extension/retraction of the plurality of linear actuators.

10. The active vibration mitigation method of claim 1 , comprising:

extending/retracting the plurality of linear actuators in a coordinated manner for adjusting position of the aircraft seat in six degrees-of-freedom based on inputs received from a user input device communicatively coupled with the controller.

11. The active vibration mitigation method of claim 1 , comprising initiating vibration of the seat by controlling an extension/retraction of the plurality of linear actuators at a predetermined frequency and amplitude for providing a notification to a user of the seat.

12. A vibration mitigation method for an aircraft seat, comprising:

receiving, via a controller, command inputs from a pilot control device or autopilot servo;

determining, via the controller, an expected level of vibration for the aircraft seat based on the command inputs;

receiving, via the controller, vibration data from an accelerometer mounted to the aircraft seat; and

damping vibration of the aircraft seat via a plurality of linear actuators based on the expected level of vibration and the vibration data.

13. The vibration mitigation method of claim 12 , comprising filtering the vibration data to remove low amplitude signals or low frequency signals.

14. The vibration mitigation method of claim 12 , comprising:

determining that the aircraft is banking a turn based on the command inputs; and

tilting the aircraft seat to partially or fully counteract a banked turn.

15. The vibration mitigation method of claim 12 , comprising:

determining a pitch of the aircraft based on the command inputs; and

tilting the aircraft seat to partially or fully counteract the pitch of the aircraft.

16. The vibration mitigation method of claim 12 , comprising:

selecting a mode of operation via a user interface;

actively damping vibrations in all directions while in a full stabilization mode; and

actively damping vibrations in a Z-axis while in a reduced stabilization mode.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 16, 2022
From: FAGAN, STEPHEN HOWARD; WARREN, PAUL STOKHOLM; PEARSON, EMILY O'KELLEY; KNEUPER, JEREMY JOSEPH; KENDRICK, PHILLIP ANTHONY
To: TEXTRON AVIATION INC.
Reel/Frame 061116/0568 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 16, 2022
From: TEXTRON AVIATION INC.
To: TEXTRON AVIATION RHODE ISLAND INC.
Reel/Frame 061116/0764 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 16, 2022
From: TEXTRON AVIATION RHODE ISLAND INC.
To: TEXTRON INNOVATIONS, INC.
Reel/Frame 061116/0873 →
Continuity (3)
Division 16660192 · Oct 22, 2019
Provisional Application 62886467 · Aug 14, 2019
Provisional Application 62760393 · Nov 13, 2018