TEST PROCEDURE FOR DETERMINING STEERING INTERMEDIATE SHAFT RATTLE
First Claim
1. A method for determining rattle noise of a vehicle steering system, the method comprising:
- providing an intermediate shaft assembly comprising a first shaft member coupled to a second shaft member by a first joining member, a third shaft member coupled to the second shaft member by a second joining member, the first shaft member coupled to a first motor and the third shaft coupled to a second motor;
providing a first sensor coupled to the first joining member and a second sensor coupled to the second joining member, the first sensor configured to measure an acceleration of the first joining member and the second sensor configured to measure an acceleration of the second joining member;
providing a controller electrically connected to the first and second sensors and the first and second motors;
generating, by the controller, a first control signal transmitted to the first motor;
generating, by the controller, a second control signal transmitted to the second motor;
applying, via the first motor, a first torque to the intermediate shaft assembly;
applying, via the second motor, a second torque to the intermediate shaft assembly;
receiving, by the controller, first acceleration data from the first sensor and second acceleration data from the second sensor; and
analyzing, by the controller, the first and second acceleration data to determine a rattle noise of the intermediate shaft assembly.
1 Assignment
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Accused Products
Abstract
An exemplary method for determining rattle noise of a vehicle steering system includes providing an intermediate shaft assembly including a first shaft member coupled to a second shaft member by a first joining member, a third shaft member coupled to the second shaft member by a second joining member, the first shaft member coupled to a first motor and the third shaft coupled to a second motor, providing a first sensor coupled to the first joining member and a second sensor coupled to the second joining member, sensors configured to measure an acceleration of the first joining member and the second joining member, applying a first torque and a second torque to the intermediate shaft assembly, receiving first acceleration data from the first sensor and second acceleration data from the second sensor, and analyzing the first and second acceleration data to determine a rattle noise of the intermediate shaft assembly.
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Citations
16 Claims
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1. A method for determining rattle noise of a vehicle steering system, the method comprising:
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providing an intermediate shaft assembly comprising a first shaft member coupled to a second shaft member by a first joining member, a third shaft member coupled to the second shaft member by a second joining member, the first shaft member coupled to a first motor and the third shaft coupled to a second motor; providing a first sensor coupled to the first joining member and a second sensor coupled to the second joining member, the first sensor configured to measure an acceleration of the first joining member and the second sensor configured to measure an acceleration of the second joining member; providing a controller electrically connected to the first and second sensors and the first and second motors; generating, by the controller, a first control signal transmitted to the first motor; generating, by the controller, a second control signal transmitted to the second motor; applying, via the first motor, a first torque to the intermediate shaft assembly; applying, via the second motor, a second torque to the intermediate shaft assembly; receiving, by the controller, first acceleration data from the first sensor and second acceleration data from the second sensor; and analyzing, by the controller, the first and second acceleration data to determine a rattle noise of the intermediate shaft assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining rattle noise of a vehicle steering system, the method comprising:
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providing an intermediate shaft assembly comprising a first shaft member coupled to a second shaft member by a first joining member, a third shaft member coupled to the second shaft member by a second joining member, the first shaft member coupled to a first motor and the third shaft coupled to a second motor; providing a first sensor coupled to the first joining member and a second sensor coupled to the second joining member, the first sensor configured to measure an acceleration of the first joining member and the second sensor configured to measure an acceleration of the second joining member; providing a controller electrically connected to the first and second sensors and the first and second motors; generating, by the controller, a first control signal transmitted to the first motor; generating, by the controller, a second control signal transmitted to the second motor; applying, via the first motor, a first torque and a second torque to the intermediate shaft assembly; receiving, by the controller, first acceleration data from the first sensor and second acceleration data from the second sensor; receiving, by the controller, first motor torque data from the first motor and second motor torque data from the second motor; generating, by the controller, a net torque signal from the first and second motor torque data and generating an apply rate wave from the net torque signal; determining, by the controller, a plurality of peak acceleration value from each peak of the apply rate wave and fitting a line to the plurality of peak acceleration values; determining, by the controller, a rattle acceleration value from the fitted line; and analyzing, by the controller, the rattle acceleration value to determine a rattle noise of the intermediate shaft assembly. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for determining rattle noise of a vehicle steering system, comprising:
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an intermediate shaft assembly comprising a first shaft member coupled to a second shaft member by a first joining member, a third shaft member coupled to the second shaft member by a second joining member, the first shaft member coupled to a first motor and the third shaft coupled to a second motor; a first sensor coupled to the first joining member and a second sensor coupled to the second joining member, the first sensor configured to measure an acceleration of the first joining member and the second sensor configured to measure an acceleration of the second joining member; and a controller electrically connected to the first and second sensors and the first and second motors, the controller configured to generate a first control signal transmitted to the first motor, the first control signal controlling the first motor to apply a first torque to the intermediate shaft assembly; generate a second control signal transmitted to the second motor, the second control signal controlling the second motor to apply a second torque to the intermediate shaft assembly; receive first acceleration data from the first sensor and second acceleration data from the second sensor; and analyze the first and second acceleration data to determine a rattle noise of the intermediate shaft assembly.
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Specification