Efficient high speed uniformity measurements using speed ramps
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01M-017/02
G01M-001/22
B29D-030/06
출원번호
US-0647995
(2012-12-14)
등록번호
US-10024763
(2018-07-17)
국제출원번호
PCT/US2012/069745
(2012-12-14)
국제공개번호
WO2014/092722
(2014-06-19)
발명자
/ 주소
Nicholson, Verner Steve
Traylor, James Michael
출원인 / 주소
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
대리인 / 주소
Dority & Manning, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
Methods and systems for improving the uniformity of a tire by determining one or more high speed uniformity parameters of the tire are provided. The high speed uniformity parameters can be determined by continuously acquiring uniformity data while ramping the tire to and from high speeds. For instan
Methods and systems for improving the uniformity of a tire by determining one or more high speed uniformity parameters of the tire are provided. The high speed uniformity parameters can be determined by continuously acquiring uniformity data while ramping the tire to and from high speeds. For instance, measured uniformity data can be continuously collected for the tire as the tire is increased to high rotational speeds and decreased from high rotational speeds. The measured uniformity data can then be analyzed to determine one or more high speed uniformity parameters for the tire. For instance, the measured uniformity data can be corrected for non-high speed uniformity contributions to the uniformity measurements, such as contributions resulting from non-uniformity of a road wheel use to load the tire during uniformity testing, contributions resulting from mass unbalance of the tire, and contributions from low speed uniformity parameters of the tire.
대표청구항▼
1. A method of determining one or more high speed uniformity parameters of a tire, the method comprising: rotating a tire through a plurality of rotational speeds according to a speed ramp profile, the speed ramp profile specifying increasing the rotational speed of a tire in a first direction to a
1. A method of determining one or more high speed uniformity parameters of a tire, the method comprising: rotating a tire through a plurality of rotational speeds according to a speed ramp profile, the speed ramp profile specifying increasing the rotational speed of a tire in a first direction to a first rotational speed, and decreasing the rotational speed of the tire in the first direction from the first rotational speed;continuously acquiring measured uniformity data for the tire while rotating the tire and while the rotational speed of the tire is increasing and decreasing according to the speed ramp profile; andanalyzing the measured uniformity data acquired while rotating the tire and while the rotational speed of the tire is increasing and decreasing according to the speed ramp profile to determine one or more high speed uniformity parameters for the tire. 2. The method of claim 1, wherein the speed ramp profile further specifies increasing the rotational speed of the tire in a second direction to a second rotational speed and decreasing the rotational speed of the tire in the second direction from the second rotational speed. 3. The method of claim 2, wherein the first rotational speed and the second rotational speed are greater than about 600 rotations per minute. 4. The method of claim 1, wherein analyzing the measured uniformity data to determine one or more high speed uniformity parameters for the tire comprises correcting for one or more non-high speed uniformity contributions to the measured uniformity data. 5. The method of claim 4, wherein the one or more non-high speed uniformity contributions comprise one or more of a road wheel contribution, a mass unbalance contribution, or a low speed uniformity contribution. 6. The method of claim 4, wherein correcting for one or more non-high speed uniformity contributions comprises: modeling the measured uniformity data as a sum of a high speed uniformity term and one or more non-high speed uniformity terms; andestimating coefficients for the non-high speed uniformity terms using a regression analysis. 7. The method of claim 4, wherein the speed ramp profile specifies free rotation of the tire under an unloaded condition at the first rotational speed prior to decreasing the rotational speed of the tire in the first direction from the first rotational speed. 8. The method of claim 7, wherein correcting for one or more non-high speed uniformity contributions comprises identifying a mass unbalance contribution from uniformity data acquired during the free rotation of the tire under an unloaded condition. 9. The method of claim 4, wherein the speed profile further specifies maintaining the tire at zero rotational speed between decreasing the rotational speed of the tire in the first direction from the first rotational speed and increasing the rotational speed of the tire in a second direction to a second rotational speed. 10. The method of claim 9, wherein correcting for one or more non-high speed uniformity contributions comprises identifying a mass unbalance contribution from a moment measurement performed while the tire is maintained at zero rotational speed. 11. The method of claim 4, wherein correcting for one or more non-high speed uniformity contributions comprises: modeling the measured uniformity data as a sum of a high speed uniformity term and a mass unbalance term; andestimating coefficients for the mass unbalance term. 12. The method of claim 4, wherein the correcting for one or more non-high speed uniformity contributions comprises: modeling the measured uniformity data as a sum of a high speed uniformity term and a road wheel term;estimating coefficients for the road wheel term. 13. The method of claim 4, wherein the correcting for one or more non-high speed uniformity contributions comprises: modeling the measured uniformity data as a sum of a high speed uniformity term and a low speed uniformity term; andestimating coefficients for the low speed uniformity term. 14. The method of claim 1, wherein the method further comprises performing a correction technique on the tire based on the one or more high speed uniformity parameters. 15. A system for determining one or more high speed uniformity parameters of a tire, the system comprising: a tire hub on which a tire is securely mounted for rotation at a plurality of rotational speeds;a measurement machine configured to acquire uniformity data for the tire as the tire is rotated by said tire hub; anda control system coupled to said measurement machine and said tire hub, said computer control system configured to control said tire hub to rotate the tire through the plurality of rotational speeds according to a speed ramp profile, the control system configured to control said measurement machine to continuously acquire measured uniformity data for the tire while the tire is rotated and while the rotational speed of the tire is increasing and decreasing according to the speed ramp profile, the control system further configured to analyze the measured uniformity data acquired while rotating the tire and while the rotational speed of the tire is increasing and decreasing according to the speed ramp profile to determine one or more high speed uniformity parameters for the tire;wherein the speed ramp profile specifies increasing the rotational speed of the tire in a first direction to a first rotational speed, and decreasing the rotational speed of the tire in the first direction from the first rotational speed. 16. The system of claim 15, wherein the speed ramp profile further specifies increasing the rotational speed of the tire in a second direction to a second rotational speed and decreasing the rotational speed of the tire in the second direction from the second rotational speed. 17. The system of claim 15, wherein the system comprises a road wheel configured to load the tire during rotation of the tire by said tire hub. 18. The system of claim 17, wherein the control system is configured to analyze the measured uniformity data to determine one or more high speed uniformity parameters by correcting for a mass unbalance contribution and a road wheel contribution to the measured uniformity data. 19. The system of claim 17, wherein the control system is configured to correct for a mass unbalance contribution and a road wheel contribution to the measured uniformity data by: modeling the measured uniformity data as a sum of a high speed uniformity term, a mass unbalance term, and a road wheel contribution term; andestimating coefficients for the mass unbalance term and the road wheel term. 20. The system of claim 19, wherein the control system is further configured to correct for a low speed uniformity contribution to the measure uniformity data.
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