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US 12,488,154 B2Granted
Systems and methods for designing kinetic shapes
AssigneeUniversity of South Florida
InventorsIsmet Handzic, Kyle B. Reed
Life of this patent
Estimating the term…
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.
Claims17
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, Fv is the vertical applied force, Fr is the desired reaction force profile, and θi 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.
40 more elements
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
- )
-
- d
-
- θ
- ]
- ,
- where θ is an angular position around the kinetic shape, R is the radius of the kinetic shape, Fv is the applied force, Fr is the desired reaction force, and θi is an initial angle of the wheel;
- and
- a manufacturing equipment that produces the wheel that includes the kinetic roll over shape, the wheel being configured to be connected to the weight bearing member via the axle to form the mobility aid device that is personalized for the given subject.
38 more elements
A non-transitory computer-readable medium comprising instructions to cause a processor to:
- obtain kinetic gait data from a subject as the subject walks over a force plate for a plurality of times, the kinetic gait data including an applied weight of the subject to the force plate;
- display a prompt to a user via a user interface to input information concerning the kinetic gait data;
- based on the input information and the kinetic gait data, determine a desired ground reaction force for a mobility aid device based on a gait symmetry of the subject in response to the applied weight;
- calculate a two-dimensional profile for a roll over shape of a ground contacting portion of the mobility aid device, the roll over shape having a radius that varies relative to an axis point of the ground contacting portion, such that the ground contacting portion provides the desired reaction force profile upon application of the applied weight, wherein the radius of the roll over shape is defined according to:
- R
- t
- (
- θ
- ,
- ϕ
- )
- =
- R
- t
- (
- θ
- i
- ,
- ϕ
- i
- )
-
- exp
- [
- F
- r
- (
- θ
- ,
- ϕ
- )
- F
- v
- (
- θ
- ,
- ϕ
- )
-
- d
-
- θ
- ]
- ,
- where θ is an angular position around the kinetic shape, R is the radius of the kinetic shape, Fv is the applied force, Fr is the desired reaction force, and θi is an initial angle of the wheel;
- and
- store a design file for the mobility aid device that is custom designed for the subject and includes the two-dimensional profile.
44 more elements
Dependencies are inferred from the claim text.