A Wavelet Decomposition Method for Tuning Thermal Models to Aperiodic Transient Test Data

2012 ◽  
Author(s):  
Matthew Kaplan ◽  
Matt Garrett ◽  
Bryan Rasmussen
Keyword(s):  
Test Data ◽  
Decomposition Method ◽  
Wavelet Decomposition ◽  
Thermal Models

3D Topography Analysis of Ball-End Milled H-13 Die Steel Surfaces Using Wavelet Decomposition Method

2016 ◽  
Vol 693 ◽  
pp. 689-696
Author(s):  
Shuai Liu ◽  
Jun Zhao ◽  
Xian Hua Tian ◽  
Wen Zhen Qin
Keyword(s):  
Surface Topography ◽  
Frequency Band ◽  
High Frequency ◽  
Decomposition Method ◽  
Wavelet Decomposition ◽  
Great Influence ◽  
Median Frequency ◽  
Die Steel ◽  
Changing Trend ◽  
Steel Surfaces

Optical profiler is employed to measure the surface topography of H-13 die steel machined by ball end cutter. By using 2D discret wavelet decomposition, the topographies of different frequency bands are obtained and the influence of cutter posture on varying frequncy bands topography is studied. The results show that cutter posture has a great influence on the whole frequency band roughness. The changing trend of roughness is roughly the same under different cutter postures which increase firstly then decrease with the decrease in frequency. A surface with a small high frequency roughness may have a large median frequency roughness.

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