Experimental investigation on identifying friction state in lubricated tribosystem based on friction-induced vibration signals

The aim of the present paper is to indicate how to identify friction state by the friction-induced vibration in a lubricated tribosystem. The friction-induced vibration signals with two different amplitude-frequency characteristics were respectively extracted from the measured vibration signals and their relationships with friction state were discussed. The results show that the friction-induced vibration is closely related to the friction state and can be used to identify the friction state. Therefore, the proposed approach can be a reliable tool for identifying friction state. (C) 2019 Elsevier Ltd. All rights reserved.