Tire Uniformity Measurement Harmonic Correction
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Solution Overview
Problem
Conventional tire uniformity measurement methods often inaccurately attribute tire non-uniformities to measurement process harmonics, leading to incorrect tire manufacturing adjustments and reduced ride comfort due to transmitted vibrations.
Innovation Solution
A method and system that utilize Weibull regression analysis to identify and correct measurement errors caused by measurement process harmonics by transforming uniformity parameter magnitudes and estimating parameters of a probability distribution, allowing for accurate data indicative of measurement errors to modify tire manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement methods are used to measure tire uniformity, then measurement process is simple, but measurement precision deteriorates due to inability to distinguish tire harmonics from measurement process harmonics
Solution Approach 1:
The patent segments the uniformity measurement process into distinct components: tire harmonic effects and measurement process harmonic effects. By applying Weibull regression analysis, the method separates these two sources of periodic variation, allowing independent identification and correction of measurement errors from actual tire non-uniformities.
Solution Approach 2:
The patent introduces Weibull regression analysis as an intermediary computational method between the raw measurement data and the final uniformity assessment. This intermediary process models the probability distribution of measurement magnitudes and identifies measurement process harmonics that would otherwise be confounded with tire harmonics.
2Manufacturing precision
If measurement process harmonics are not corrected, then manufacturing process is simple, but manufacturing precision deteriorates due to incorrect uniformity adjustments
Solution Approach 1:
The patent performs preliminary analysis of measurement data using Weibull regression before making manufacturing adjustments. By identifying and correcting measurement process harmonics in advance, the method ensures that subsequent manufacturing decisions are based on accurate tire uniformity data rather than contaminated measurements.
Solution Approach 2:
The patent implements a feedback mechanism where measurement data is analyzed, measurement process harmonics are identified and corrected, and the corrected information is used to adjust manufacturing processes. This closed-loop approach continuously improves tire uniformity by eliminating the confounding effects of measurement errors.
3Reliability
If tire harmonics and measurement process harmonics are not distinguished, then analysis process is simple, but reliability deteriorates due to incorrect attribution of non-uniformities
Solution Approach 1:
The patent segments the sources of periodic variation in uniformity measurements into tire harmonics (actual tire non-uniformities) and measurement process harmonics (measurement errors). By modeling the probability distribution of measurement magnitudes through Weibull regression, the method reliably distinguishes between these two segments, improving the reliability of uniformity assessments.
Data Source
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AI summary
Methods and systems for improving the uniformity of a tire are provided. More particularly, a magnitude of a uniformity parameter can be obtained for each tire in a set of a plurality of tires. The magnitudes associated with the set of tires can be transformed according to a probability distribution function (e.g. a Weibull distribution function) to obtain a set of transformed magnitudes. Parameters associated with a probability distribution function can be estimated based at least in part on the transformed magnitudes. Parameters associated with the probability distribution function can be used to determine data indicative of a measurement error in the uniformity measurements attributable to a measurement process harmonic. The data indicative of the measurement error can be used to correct uniformity measurements obtained for tires and to modify tire manufacture based at least in part on the corrected measurements.