Running-in state identification method based on frictional temperature signal

Abstract

The invention discloses a running-in state identification method based on a frictional temperature signal, comprising the following steps: transmitting a temperature signal acquired by a thermal resistance to a data acquisition system by virtue of a temperature transmitter, then sequentially performing gross error removal, wavelet denoising, phase space reconstruction and nonlinear coordinate calculation, constructing a coordinate graph, plotting points, and finally performing a clustering algorithm, when the calculated nonlinear coordinates are of the same type for three times in succession and are different from an initial point in the type, judging running-in to be finished, otherwise, judging the running-in to be unfinished. The method disclosed by the invention can effectively measurerunning-in condition of a friction pair in a frictional wear process. The measured temperature signal is subjected to the gross error removal and wavelet denoising, thus signal effectiveness is guaranteed; and due to the phase space reconstruction and calculation of the nonlinear coordinates, the problems that the conventional data measurement is tedious and period is long are avoided; and finally clustering computation is performed, thus a running-in state of the friction pair can be efficiently judged.

Description

technical field [0001] The invention relates to the field of friction and wear testing, in particular to a method for identifying a running-in state based on a friction temperature signal. Background technique [0002] The operating conditions of the mechanical friction pair need to be adjusted according to the wear state, so the identification and detection of the running-in state of the friction pair has always been an important topic. [0003] The identification of the running-in state of the friction pair is mainly carried out through the analysis of oil fluid analysis, vibration, noise and temperature signal. In oil analysis, technologies such as ferrography and spectral analysis can intuitively express the wear principle of the friction pair. For example, the content of each metal element in the lubricating oil can be measured by spectral analysis, and then combined with the wear mechanism of the metal, the running-in state of the friction pair can be identified. Howe...

AI Technical Summary

Problems solved by technology

However, different friction pairs may have the same metal element, which makes it impossible to judge the proportion of a certain metal element from each friction pair, and its content may change due to the replacement of lubricating oil, resulting in misjudgment of the running-in state

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