Systems and methods for designing kinetic shapes

Patent metadata

Field	Value
Publication number	US-12488154-B2
Application number	US-202217902322-A
Country	US
Kind code	B2
Filing date	Sep 2, 2022
Priority date	Feb 12, 2014
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

In one embodiment, a kinetic shape is designed by determining an applied force to be applied to an object that is to incorporate the kinetic shape, determining a reactive force that is desired to be produced in response to the applied force, inputting the applied force and the reactive force into a kinetic shape equation, and solving the equation to obtain the kinetic shape.

First claim

The invention claimed is:

1 . A system for manufacturing a mobility aid device having a kinetic shape, the system comprising:
a user interface, including a user input device; a processor; a memory communicatively connected to the processor and having a set of software instructions stored thereon which, when executed by the processor, cause the processor to:
receive information regarding: vertical applied force during a stance phase of a given subject's gait based on the given subject's weight, and a personalized measurement of the given subject's gait, and desired horizontal force to be applied by the mobility aid device during the given subject's stance phase;
determine a desired reaction force profile based on the personalized measurement, the vertical applied force, and the desired horizontal force, the desired reaction force profile corresponding to desired forces to be applied to the given subject during the given subject's stance phase;
determine a two-dimensional profile for a roll over shape of the mobility aid device based on the information regarding the vertical applied force and the desired reaction force profile to provide the desired reaction force profile upon application of the vertical applied force at an axis of the roll over shape of the mobility aid device of the given subject, according to:

R
⁡
(
θ
)

=

R
⁡
(

θ
i

)

⁢

exp
[

∫

F
r

(
θ
)

F
v

(
θ

⁢
d
⁢
θ

]

,

where θ is an angular position around the two-dimensional profile, R is a radius of the two-dimensional profile, F v is the vertical applied force, F r is the desired reaction force profile, and θ i is an initial angle of the object; and
design the mobility aid device personalized for the given subject, the mobility device comprising the roll over shape based on the two-dimensional profile; and
output a file representing the mobility aid device including the roll over shape based on the two-dimensional profile in memory.

2 . The system of claim 1 , wherein the two-dimensional profile comprises an irregularly curved shape for rotating around the axle, the two-dimensional profile configured to have a peripheral point configured to touch a flat plane, the two-dimensional profile generating the desired reaction force profile parallel to the flat plane in response to a force being applied perpendicular to the flat plane.

3 . The system of claim 2 , wherein a ground point of the applied force to the flat plane is different from the peripheral point to roll the irregularly curved shape on the flat plane.

4 . The system of claim 2 , wherein the applied force comprises a constant force.

5 . The system of claim 2 , wherein the desired reaction force profile comprises a constant force.

6 . The system of claim 2 , wherein the desired reaction force profile comprises a variable force to determine the two-dimensional profile by determining an angle between the flat plane and a line from the peripheral point to the axle through which the irregularly curved shape rotates.

7 . The system of claim 6 , wherein the variable force comprises a constant force with a sinusoidal force.

8 . The system of claim 6 , wherein the variable force comprises a piecewise force function using a plurality of Fourier series terms.

9 . The system of claim 1 , wherein the file includes an axle point aligned with the axis point and that corresponds to an opening in the mobility aid device for an axle.

10 . The system of claim 9 , wherein the axle is configured to be attached to a shoe, such that a peripheral point initially contacts a flat plane when a wearer of the shoe takes a step.

11 . The system of claim 1 , wherein the mobility aid device includes a spring to bias the object toward an initial position of the object at the initial angle.

12 . A system for designing a mobility aid device for a user, the system comprising:
a weight bearing member of the mobility aid device, the weight bearing member configured to receive an applied force from a given subject while in motion and to provide the applied force at an axle connected to the weight bearing member; a non-transitory computer-readable medium storing executable instructions to;
receive information regarding the applied force and desired forces to be applied by the mobility aid device to the given subject,
determine a desired reaction force profile for the mobility aid device to provide a corresponding desired reaction force to the given subject while in motion,
produce a kinetic roll over shape that defines a shape of a wheel for the mobility aid device, the wheel configured to be mounted to the axle, the kinetic shape configured to provide the desired reaction force upon application of the applied force at the axle,
determine an axle point that corresponds to an opening in the wheel for mounting the axle, the kinetic shape based on the applied force and the desired reaction force and having a radius according to:

R
⁡
(
θ
)

=

R
⁡
(

θ
i

)

⁢

exp
[

∫

F
r

(
θ
)

F
v

(
θ
)

⁢

Assignees

• Univ South Florida

Inventors

• Handzic Ismet
• Reed Kyle B

Classifications

• G06F2119/14

  Force analysis or force optimisation, e.g. static or dynamic forces · CPC title

• G06F30/00 Primary

  Computer-aided design [CAD] · CPC title

• G06F30/10 Primary

  Geometric CAD · CPC title

• G06F17/11

  for solving equations {, e.g. nonlinear equations, general mathematical optimization problems (optimization specially adapted for a specific administrative, business or logistic context G06Q10/04)} · CPC title

• A63B21/012

  using frictional force-resisters {(electromagnetically-controlled brakes A63B21/0056)} · CPC title