Correlation Between Friction Coefficient and Friction Vibration in Running-In Process Based on Cross Recurrence Plots

Abstract

Friction coefficient is difficult to measure in real application, whether it can be replaced by friction coefficient for dynamic analysis is an urgent issue to be solved. To study the correlation between the two signals, the friction tests were carried out under dry friction, starved and flooded lubrications, respectively. Cross recurrence plot (CRP) and its measures (recurrence rate, determinism, average diagonal line length and entropy) were used to explore the correlation. The results show that the more obvious the diagonal structures in CRPs, the stronger the correlation between the two signals, and average diagonal length is more sensitive to the degree of correlation. Irrespective of lubrication conditions, friction coefficient and vibration measured in a friction system have similar recursive characteristics. Thus, friction coefficient or vibration can be selected according to the convenience of measurement to monitor the running-in process.

Vectorial feature and evolution of run-in attractors for the AgCu-MoS2/AgCu10 tribo-pair

“…It is an important stage before it is put into normal operation. A tribological system is a nonlinear system affected by many factors [3][4][5]. The run-in state and its development directly affect the tribo-pair's work efficiency and serviceable life [6].…”

Experimental Investigation on the Friction‐Induced Vibration with Periodic Characteristics in a Running‐In Process under Lubrication

“…For example, Ding et al [17] found that the friction noise attractor is chaotic, and the attractor evolution of friction noise can help identify the wear process. Zhou et al [18] studied the correlation between the aperiodic FIV and friction coefficient under different friction states by cross recurrence plot. Xu et al [19] characterized the surface wear state of a sliding-rolling contact through the features of the aperiodic FIV.…”