Laboratory comparative tests for geomaterial strengths with drilling process monitoring technique

2008 ◽  
pp. 127-131
Author(s):  
Z Yue ◽  
W Lu ◽  
T Lau
2004 ◽  
Vol 13 (4) ◽  
pp. 096369350401300 ◽  
Author(s):  
D. Kim ◽  
M. Ramulu

Drilling experiments were conducted using carbide and cryogenic treated carbide drills into carbon fiber-reinforced thermoplastic composites, namly Graphite/PIXA-M (PIXA-M) composites. Drilling force signals were collected from all conditions and analysed using fast Fourier transformations and autoregressive (AR) time series models. Power spectrums were used to examine the cutting characteristics in the drilling process. AR coefficients were used to distinguish the cutting signals of autoclaved and induction heated PIXA-M composites, and conventional and cryogenic treated carbide drills.


2013 ◽  
Vol 711 ◽  
pp. 602-607
Author(s):  
Da Ming Pei ◽  
Li Rui Wang ◽  
Qi Jin Tang

Aiming at the demands of top-down task transmission and bottom-up status coordination in the execution of ship curved block construction, a hierarchical execution process monitoring technique considering workplace, curved block, task package (TP) and workload distribution sheet (WDS) was put forward. Adopting linear fitting and graphics epitaxy, the plane vector projection modeling for ship curved block was achieved. Based on visualized monitoring technology for curved blocks evolution over time in workplace, a hierarchical execution process monitoring system was built. Through data collection and feedback based on work distribution sheet, the backwards status coordination was implemented. At last, the validity of the proposed technique was verified by an application example.


2005 ◽  
Vol 21 (1) ◽  
pp. 13-28 ◽  
Author(s):  
Jyh-Jen H. Shiau ◽  
Chih-Rung Chen ◽  
Carol J. Feltz

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