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< h1 class = "title" > Metrology< / h1 >
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< h2 > Table of Contents< / h2 >
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< li > < a href = "#orgdf449a5" > 1. How do we measure the position of the sample with respect to the granite< / a > < / li >
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< p >
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The global measurement and control schematic is shown in figure < a href = "#org1be8cfd" > 1< / a > .
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< / p >
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< p > < img src = "figs/control-schematic-nass.png" alt = "control-schematic-nass.png" / >
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< p > < span class = "figure-number" > Figure 1: < / span > Global Control Schematic for the Station< / p >
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< p >
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In this document, are interesting by the "compute Sample Position w.r.t. Granite" bloc.
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< / p >
< p >
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First, in section < a href = "#org09b824d" > 1< / a > , is explained how the measurement of the position of the sample with respect to the granite is performed (using Simscape blocs).
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< / p >
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< h2 id = "orgdf449a5" > < span class = "section-number-2" > 1< / span > How do we measure the position of the sample with respect to the granite< / h2 >
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< p >
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< a id = "org09b824d" > < / a >
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A transform sensor block gives the translation and orientation of the follower frame with respect to the base frame.
< / p >
< p >
The base frame is fixed to the granite and located at the initial sample location that defines the zero position.
< / p >
< p >
The follower frame is attached to the sample (or more precisely to the reflector).
< / p >
< p >
The outputs of the transform sensor are:
< / p >
< ul class = "org-ul" >
< li > the 3 translations x, y and z in meter< / li >
< li > the < b > rotation matrix< / b > \(\bm{R}\) that permits to rotate the base frame into the follower frame.< / li >
< / ul >
< p >
We can then determine extract other orientation conventions such that Euler angles or screw axis.
< / p >
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< div id = "postamble" class = "status" >
< p class = "author" > Author: Dehaeze Thomas< / p >
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< p class = "date" > Created: 2019-12-11 mer. 17:33< / p >
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< p class = "validation" > < a href = "http://validator.w3.org/check?uri=referer" > Validate< / a > < / p >
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