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

2020 ◽  
Vol 138 ◽  
pp. 106590 ◽  
Author(s):  
Pengfei Xing ◽  
Guobin Li ◽  
Hongtao Gao ◽  
Guoyou Wang
Keyword(s):  
Experimental Investigation ◽  
Vibration Signals ◽  
Friction Induced Vibration

Analysis of fingertip/fabric friction-induced vibration signals toward vibrotactile rendering

2015 ◽  
pp. 1-9
Author(s):  
Jiyong Hu ◽  
Xiaofeng Zhang ◽  
Xudong Yang ◽  
Ruitao Jiang ◽  
Xin Ding ◽  
...  
Keyword(s):  
Vibration Signals ◽  
Friction Induced Vibration

scholarly journals Quasi-Harmonic Friction-Induced Vibration

1970 ◽  
Vol 92 (4) ◽  
pp. 550-556 ◽  
Author(s):  
C. A. Brockley ◽  
P. L. Ko
Keyword(s):  
Experimental Investigation ◽  
Friction Velocity ◽  
Velocity Curve ◽  
Harmonic Vibration ◽  
Dynamic Friction ◽  
Sliding Velocity ◽  
Friction Forces ◽  
Automatic Transmissions ◽  
Friction Induced Vibration

A theoretical and experimental investigation of quasi-harmonic friction-induced vibration is reported. The vibration is of near-sinusoidal form and is solely governed by dynamic friction forces. However, the friction-velocity curve must be of a particular shape for the vibration to occur. The amplitude of the quasi-harmonic vibration is shown to increase with sliding velocity until oscillation ceases at some upper velocity boundary. The introduction of suitable damping will quench the vibration entirely. The vibration can exist at high sliding velocities and as a consequence may influence the operation of automatic transmissions, brakes, and clutches.

Experimental Investigation on the Influence of Tool System Imbalance on its Vibration Characteristics

2011 ◽  
Vol 291-294 ◽  
pp. 1768-1772
Author(s):  
Chun Gen Shen ◽  
Gui Cheng Wang ◽  
Shu Lin Wang ◽  
Gang Liu
Keyword(s):  
Experimental Investigation ◽  
Frequency Response ◽  
Frequency Spectrum ◽  
Spectrum Analysis ◽  
Structural Design ◽  
Vibration Characteristics ◽  
Vibration Characteristic ◽  
Frequency Spectrum Analysis ◽  
Vibration Signals ◽  
Speed Condition

Due to particular structural design, the error of manufacturing and other factors, the tool system will have more or less residual imbalance. The spindle-tool system’s vibration signals and its frequency response structure were made as reference under the testing of machine raising speed idle running, firstly the tool system’s amount of imbalance was adjusted with the aid of the special balancing ring, then the spindle-tool system’s vibration characteristic was obtained under various amount of imbalanced in idle running condition, finally making use of frequency spectrum analysis the influence of unbalanced quantity to spindle-tool system’s vibration characteristics was studied and compared, the results and the researching approach can help to find the rules about the influence of tool system imbalance to its vibration characteristics in higher speed condition.

Analysis and Experimental Investigation of Chatter Suppression in High-Speed Cylindrical Grinding

2010 ◽  
Vol 34-35 ◽  
pp. 1936-1940 ◽  
Author(s):  
Xiao Long Shen ◽  
Lai Xi Zhang ◽  
Hua Long ◽  
Zhi Xiong Zhou
Keyword(s):  
Experimental Investigation ◽  
High Speed ◽  
Spectral Estimation ◽  
Vibration Energy ◽  
Variable Speed ◽  
Vibration Signals ◽  
Chatter Suppression ◽  
High Speed Grinding ◽  
The Stability

In this paper, the variable speed grinding experiments at high speed have been studied systematically, and the method of improving the surface quality of high-speed grinding has been discussed on the basis of analysis of the chatter and the stability of the high-speed grinder. Through the variable speed grinding experiments at high speed, the vibration characteristics were measured by the vibration energy, and the power spectrum were analyzed by the maximum entropy spectral estimation of the vibration signals in time series. The results confirm that the chatter of high-speed grinding can be suppressed by the variable speed grinding to a certain extent.

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

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Di Sun ◽  
Pengfei Xing ◽  
Guobin Li ◽  
Hongtao Gao ◽  
Sifan Yang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Friction Pair ◽  
Wavelet Packet ◽  
Mean Square ◽  
Oil Lubrication ◽  
Composite Surface ◽  
Wear Process ◽  
Time Frequency ◽  
Harmonic Wavelet ◽  
Friction Induced Vibration

This paper investigated the friction-induced vibration (FIV) behavior under the running-in process with oil lubrication. The FIV signal with periodic characteristics under lubrication was identified with the help of the squeal signal induced in an oil-free wear experiment and then extracted by the harmonic wavelet packet transform (HWPT). The variation of the FIV signal from running-in wear stage to steady wear stage was studied by its root mean square (RMS) values. The result indicates that the time-frequency characteristics of the FIV signals evolve with the wear process and can reflect the wear stages of the friction pairs. The RMS evolution of the FIV signal is in the same trend to the composite surface roughness and demonstrates that the friction pair goes through the running-in wear stage and the steady wear stage. Therefore, the FIV signal with periodic characteristics can describe the evolution of the running-in process and distinguish the running-in wear stage and the stable wear stage of the friction pair.

Do moods and expectancies have unique or interactive effects?: An experimental investigation

2014 ◽  
Author(s):  
Shane Close ◽  
Victoria Adkins ◽  
Kandice Perry ◽  
Katheryn Eckles ◽  
Jill Brown ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Interactive Effects
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