Vehicle seat with angle trajectory planning during large events

Patent metadata

Field	Value
Publication number	US-2017129367-A1
Application number	US-201514934465-A
Country	US
Kind code	A1
Filing date	Nov 6, 2015
Priority date	Nov 6, 2015
Publication date	May 11, 2017
Grant date	—

Abstract

Systems and methods for controlling movement of an active payload support system. In one example, a seat system for a vehicle includes a seat, a support structure coupled to the seat and including an actuator configured to move the seat at a command angle relative to a floor of the vehicle responsive to movement of the vehicle, at least one sensor positioned to detect movement of the vehicle, and a controller configured to receive a signal from the at least one sensor, generate a command signal to instruct the actuator to move the seat relative to a floor of the vehicle, determine whether the command signal will cause the seat to exceed a limit, scale the command signal to conform to movement of the vehicle within the limit, and provide a force command to the actuator to move the seat based on the scaled command signal.

First claim

What is claimed is:

1 . A method of controlling seat movement in a vehicle, comprising:
receiving a signal from at least one sensor positioned to detect movement of the vehicle; generating a command signal to instruct an actuator coupled to the seat to move the seat relative to a vehicle centerline; determining whether the command signal will cause the seat to exceed a limit; scaling the command signal to conform movement of the seat to movement of the floor of the vehicle within the limit; and providing a force command to the actuator to move the seat based on the scaled command signal.

2 . The method of claim 1 , wherein scaling the command signal includes causing the command signal to transition to a maximum command angle and transition from the maximum command angle.

3 . The method of claim 2 , wherein causing the command signal to transition to the maximum command angle includes:
calculating an index according to:

(

ideal



command



signal

-

saturation



threshold

)

(

maximum



command



angle

-

saturation



threshold

)

,

wherein the saturation threshold includes a command angle of the command signal beyond which scaling begins; and
determining a first scaling factor based at least in part on the calculated index.

4 . The method of claim 3 , wherein the index includes an index to an attenuation table having a plurality of scaling factors, and causing the command signal to transition to a maximum command angle further includes referencing the attenuation table based on the calculated index.

5 . The method of claim 4 , wherein the plurality of scaling factors include a range of values based on a ¼ sine wave.

6 . The method of claim 3 , wherein causing the command signal to transition to the maximum command angle further includes scaling the command signal according to:
saturation threshold+((maximum command angle−saturation threshold)*first scaling factor).

7 . The method of claim 6 , wherein causing the command signal to transition from the maximum command angle includes identifying a peak value of movement of the vehicle based on a previous ideal command signal.

8 . The method of claim 7 , wherein causing the command signal to transition from the maximum command angle further includes:
generating a second scaling factor according to:

command



signal

ideal



command



signal

;

and
scaling the command signal according to:
second scaling factor*ideal command signal.

9 . The method of claim 1 , wherein the seat is positioned to move along a vertical axis extending orthogonally from the floor of the vehicle, and scaling the command signal includes limiting movement of the seat so as to prevent interference with an interior of the vehicle.

10 . The method of claim 9 , further comprising determining a maximum command angle for the command signal based on at least the position of the seat along the vertical axis extending orthogonally from the floor of the vehicle.

11 . The method of claim 10 , wherein scaling the command signal further includes determining the command signal has reached the maximum command angle, and providing a force command to the actuator includes generating a force command so as to cause the actuator to stop movement of the seat at the maximum command angle.

12 . A seat system for a vehicle, comprising:
a seat; a support structure coupled to the seat and including an actuator configured to move the seat at a command angle relative to a floor of the vehicle responsive to movement of the vehicle; at least one sensor positioned to detect movement of the vehicle; and a controller configured to:
receive a signal from the at least one sensor,
generate a command signal to instruct the actuator to move the seat relative to a floor of the vehicle,
determine whether the command signal will cause the seat to exceed a limit,
scale the command signal to conform to movement of the vehicle within the limit, and
provide a force command to the actuator to move the seat based on the scaled command signal.

13 . The seat system of claim 12 , wherein the controller is configured to scale the command signal by causing the command signal to transition to a maximum command angle and transition from the maximum command angle.

14 . The seat system of claim 13 , wherein the controller is further configured to:
calculate an index according to:

(

ideal



command



signal

-

saturation



threshold

)

(

maximum




Assignees

• Bose Corp

Inventors

• Hein Travis Lee

Classifications

• B60N2002/0212

  the seat or seat part turning about or moving along a longitudinal axis · CPC title

• B60N2/39

  Seats tiltable to compensate for roll inclination of vehicles · CPC title

• B60N2/16 Primary

  height-adjustable · CPC title

• B60N2002/0268

  Operations & Transport · mapped topic

• B60N2/0244 Primary

  with logic circuits · CPC title