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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 3 of 3 (0.09 seconds)Spelling suggestions: "subject:"enternal sensors"" "subject:"ainternal sensors""
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Detection of tool wear in drilling based on axis position signals / Metod för determinering av verktygsslitage vid borrning baserad på data från in-terna positionsensorerHansson, Anders January 2016 (has links)
Cutting operations are important and commonly used operations in the field of manufacturing. Automated machining is today commonly used in CNC-machines. One common drawback with automated machining is that the tool condition is challenging to predict which leads to a conservative tool replacement times. This leads to a low utilisation of the tool economical lifetime and an unnecessary high number of tool replacements. Methods for indirect continuous monitoring of the tool wear exist but usually require retrofitting of external sensors that can be both costly and also interrupt the machine operation due to the additional wiring. It is therefore of interest to investigate the possibility to use the, often high resolution, sensors already fitted in a CNC-machine to extract valuable data that can indirectly give an estimation of the tool condition. This thesis work has, with attention to the X-, Y- and Z-position sensors, resulted in development of algorithms that show relations between tool wear and data acquired from these sensors. The algorithms operate in the frequency domain to determine changes in the dynamic response over the time of tool degradation.
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An Evaluation of Monitoring and Preservation Techniques for the Main Cables of the Anthony Wayne BridgeLayton, Kyle William January 2013 (has links)
No description available.
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On Localization Issues of Mobile DevicesYuan, Yali 30 August 2018 (has links)
No description available.
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