SCALABLE VEHICLE MODELS FOR INDOOR TIRE TESTING
First Claim
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1. A method for creating a scalable vehicle model for indoor tire testing, comprising:
- selecting a vehicle segment representing a plurality of individual vehicles having various weights;
defining at least one vehicle model parameter, including at least one of;
the vehicle'"'"'s wheel base, the vehicle'"'"'s wheel track, the vehicle'"'"'s center of gravity, the vehicle'"'"'s suspension compliance, the vehicle'"'"'s suspension kinematics, the vehicle'"'"'s suspension alignment, the vehicle'"'"'s steering kinematics, the vehicle'"'"'s weight distribution, the vehicle'"'"'s ballasting, the vehicle'"'"'s front-to-rear brake proportioning, a tire stiffness, the vehicle'"'"'s aerodynamic drag, the vehicle'"'"'s frontal area, the vehicle'"'"'s auxiliary roll stiffness, the vehicle'"'"'s fore-aft stiffness, the vehicle'"'"'s cornering stiffness, the vehicle'"'"'s and unsprung mass; and
characterizing the at least one vehicle model parameter through regression analysis as a function of the total weight of a scalable vehicle model (“
W”
), using the equation P(W)=C0(W)+C1(W)A+C2(W)A2+C3(W)A3,wherein P(W) is the at least one vehicle model parameter,wherein Cn(W) is a regression coefficient as a function of W, andwherein A is an independent variable, including at least one of;
jounce and steering angle.
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Abstract
Tire testing systems and methods are disclosed for indoor simulation testing of tires of a wide range of sizes on a scalable vehicle model (“SVM”).
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Citations
20 Claims
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1. A method for creating a scalable vehicle model for indoor tire testing, comprising:
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selecting a vehicle segment representing a plurality of individual vehicles having various weights; defining at least one vehicle model parameter, including at least one of;
the vehicle'"'"'s wheel base, the vehicle'"'"'s wheel track, the vehicle'"'"'s center of gravity, the vehicle'"'"'s suspension compliance, the vehicle'"'"'s suspension kinematics, the vehicle'"'"'s suspension alignment, the vehicle'"'"'s steering kinematics, the vehicle'"'"'s weight distribution, the vehicle'"'"'s ballasting, the vehicle'"'"'s front-to-rear brake proportioning, a tire stiffness, the vehicle'"'"'s aerodynamic drag, the vehicle'"'"'s frontal area, the vehicle'"'"'s auxiliary roll stiffness, the vehicle'"'"'s fore-aft stiffness, the vehicle'"'"'s cornering stiffness, the vehicle'"'"'s and unsprung mass; andcharacterizing the at least one vehicle model parameter through regression analysis as a function of the total weight of a scalable vehicle model (“
W”
), using the equation P(W)=C0(W)+C1(W)A+C2(W)A2+C3(W)A3,wherein P(W) is the at least one vehicle model parameter, wherein Cn(W) is a regression coefficient as a function of W, and wherein A is an independent variable, including at least one of;
jounce and steering angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for creating a scalable vehicle model for indoor tire testing, comprising:
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selecting a vehicle segment representing a plurality of individual vehicles having various weights; defining at least one vehicle model parameter, including at least one of;
the vehicle'"'"'s wheel base, the vehicle'"'"'s wheel track, the vehicle'"'"'s center of gravity, the vehicle'"'"'s suspension compliance, the vehicle'"'"'s suspension kinematics, the vehicle'"'"'s suspension alignment, the vehicle'"'"'s steering kinematics, the vehicle'"'"'s weight distribution, the vehicle'"'"'s ballasting, the vehicle'"'"'s front-to-rear brake proportioning, a tire stiffness, the vehicle'"'"'s aerodynamic drag, the vehicle'"'"'s frontal area, the vehicle'"'"'s auxiliary roll stiffness, the vehicle'"'"'s fore-aft stiffness, the vehicle'"'"'s cornering stiffness, and the vehicle'"'"'s unsprung mass;characterizing the at least one vehicle model parameter through regression analysis as a function of the total weight of a scalable vehicle model (“
W”
), using the equation P(W)=C0(W)+C1(W)A+C2(W)A2+C3(W)A3,wherein P(W) is the at least one vehicle model parameter, wherein Cn(W) is a regression coefficient as a function of W, and is equal to an0+an1W+an2W2+an3 W3, wherein A is an independent variable, including at least one of;
jounce and steering angle; andusing vehicle dynamics software to input the characterization of the at least one vehicle model parameter as a function of W. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for creating a scalable vehicle model for indoor tire testing, comprising:
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selecting a vehicle segment representing a plurality of individual vehicles having various weights; defining at least one vehicle model parameter, including at least one of;
the vehicle'"'"'s wheel base, the vehicle'"'"'s wheel track, the vehicle'"'"'s center of gravity, the vehicle'"'"'s suspension compliance, the vehicle'"'"'s suspension kinematics, the vehicle'"'"'s suspension alignment, the vehicle'"'"'s steering kinematics, the vehicle'"'"'s weight distribution, the vehicle'"'"'s ballasting, the vehicle'"'"'s front-to-rear brake proportioning, a tire stiffness, the vehicle'"'"'s aerodynamic drag, the vehicle'"'"'s frontal area, the vehicle'"'"'s auxiliary roll stiffness, the vehicle'"'"'s fore-aft stiffness, the vehicle'"'"'s cornering stiffness, the vehicle'"'"'s unsprung mass;characterizing the at least one vehicle model parameter through regression analysis as a function of the total weight of a scalable vehicle model (“
W”
), using the equation P(W)=C0(W)+C1(W)A+C2(W)A2+C3(W)A3,wherein P(W) is the at least one vehicle model parameter, wherein Cn(W) is a regression coefficient as a function of W, and is equal to an0+an1W+an2W2+an3W3, wherein A is an independent variable, including at least one of;
jounce and steering angle;using vehicle dynamics software to input the characterization of the at least one vehicle model parameter as a function of W; applying the scalable vehicle model to at least one maneuver in the vehicle dynamics software to determine at least one of;
acceleration, deceleration, and lateral acceleration; and
creating a wheel loading history for each wheel of the scalable vehicle model; andcreating the scalable vehicle model scalable as a function of W. - View Dependent Claims (18, 19, 20)
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Specification