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Method for determining a running condition by spatial harmonic analysis of speed

A space and fixed space technology, applied to vehicle parts, tire parts, tire measurement, etc., can solve problems that affect the reliability of rolling conditions

Inactive Publication Date: 2007-08-01
S.N.R.鲁尔门斯公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when implementing the method of WO-A-00 / 01545, energy changes, even significant energy changes, do not necessarily imply changes in roll state and seriously affect the reliability of determining roll conditions

Method used

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  • Method for determining a running condition by spatial harmonic analysis of speed
  • Method for determining a running condition by spatial harmonic analysis of speed
  • Method for determining a running condition by spatial harmonic analysis of speed

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no. 3 example

[0079] In a third embodiment, the analysis includes:

[0080] In determining the window, the digital filter of the acquisition signal; and

[0081] The determination law is used as a function of at least one filtered signal characteristic value, in particular said value represents the energy of the filtered signal.

[0082] In this embodiment, the acquired signal is first filtered to avoid repeated computation of the spatial Fourier transform.

[0083] In a fourth embodiment, the analysis includes:

[0084] In the determination window, the digital filter of the acquisition signal;

[0085] computing the spatial Fourier transform of the filtered signal; and

[0086] The law is determined as a function of the value of at least one spectral characteristic, in particular the value representing the energy of the filtered signal.

[0087] In a variant, the determination window is shifted towards low frequencies before the calculations, and the spatial signal is then reconstructe...

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Abstract

The invention concerns a method for determining the running condition of a member rotating on a surface, said method comprising the initial process which consists in performing a spatial frequency analysis of the rotational speed of the member so as to identify at least one frequency window not including a harmonic of the revolution of the member wherein a law determining the running condition is established, and an iterative process for determining the running condition comprising steps which consists in: measuring the rotational speed V of said member; spatially sampling said speed with a constant spatial sampling period Delta d; analyzing the sampled signal in the frequency window identified so as to determine the running condition on the basis of the established law.

Description

technical field [0001] The invention relates to a method of determining the rolling of an element rotating on a surface. Background technique [0002] Usually used to determine at least one of the rolling or "running" of a car tire on the ground. In particular, the determined rolling conditions can be used to determine the state or parameters of the connection at the interface between the tire and the ground, which, in particular, facilitate the implementation of systems that control vehicle dynamics, such as the Anti-Sudden Death System (ABS) , Electronic Stability Program (ESP). [0003] In order to determine the rolling situation, it has been proposed to analyze how the rotational speed of the tires changes, in particular by comparing the changes in the rotational speed of two wheels on the same axle. In particular, however, the determination scheme is not satisfactory because of the nature of the correlation and because of the large number of parameters (eg cornering) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C23/06
CPCB60C23/061B60T8/171B60T8/172B60T2210/12
Inventor 克里斯托弗·杜雷特
Owner S.N.R.鲁尔门斯公司
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